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20 Best Personal Trainers in San Diego

One of the unique features of San Diego is the plethora of health and wellness services available throughout the city. Finding some of the healthiest people in San Diego isn't a surprise between the superb healthcare options and the first-class fitness industry.
20 Best Personal Trainers in San Diego

20 Best Personal Trainers in San Diego

San Diego is known as the crown and glory of the southern Californian region. It is home to millions of residents and is one of the top destinations for tourists worldwide. This isn’t surprising because the sunny weather, golden sunsets, sandy beaches, and countless attractions make this glorious city an easy choice for people of all ages, backgrounds, and nationalities. 

 

One of the unique features of San Diego is the plethora of health and wellness services available throughout the city. Finding some of the healthiest people in San Diego isn’t a surprise between the superb healthcare options and the first-class fitness industry. Almost every plaza and shopping center has a well-equipped gym with personal trainers ready to help its patrons achieve their goals. 

 

This article will spotlight some of the best personal trainers in San Diego. These trainers provide support and training for various workout styles. Whether your thing is Crossfit or Pilates, we know that one of the trainers highlighted in our article will provide excellent support on your fitness journey. 

1. David Sluss

 

David Sluss is at the top of the list of the best personal trainers in San Diego. For David, personal training is more than just a job; it is a lifestyle. David comes from a background in athletics and competitive training that spans over 20 years. Using his extensive experience and knowledge, David can provide tailored coaching to all who set out on their fitness journeys. 

 

David approaches each new client with a dedication to supporting their individual goals. Each client receives a comprehensive assessment that provides a baseline of their skills, goals, and expectations. This assessment allows David to formulate an individualized program tailored to the client’s needs and fitness goals. Each program contains nutrition guidance and physical and mental training that provides each client with a holistic approach to their fitness journey. 

 

Contact him at david@bearrepubliccrossfit.com for your fitness needs.

 

David specializes in Crossfit, and his certifications include the following: 

Crossfit Level 2 Trainer 

FRC movement specialist 

Crossfit Gymnastics Level 1 Trainer

Crossfit Gymnastics Level 2 Trainer

2. Bruce Gaston Jr. 

The next personal trainer in our spotlight is Bruce Gaston Jr. from Elite Training. Coach Bruce’s journey through athletics includes his time in the NFL, where he played for the Chicago Bears and Green Bay Packers as a football defensive tackle. Coach Bruce is a lead fitness trainer who specializes in providing comprehensive personal training as well as group training. 

 

With this extensive background, you can be sure that Bruce Gaston Jr. will help you start your fitness journey with great confidence. You can expect to achieve your first fitness challenge in just eight weeks of consistent training with Coach Bruce. Bruce’s fitness plans are unique to each client’s needs and abilities, with preventative movements that minimize injury risk.

 

In a snapshot, Coach Bruce’s certifications and experience offer the following benefits to clients: 

 

F45 Training

Self Made Training -Personal Trainer

Lateral Edge Fitness – Group Trainer

NFL – Chicago Bears, Chicago IL

NFL – Green Bay Packers, Inc. Green Bay, WI

 

3. Chris Keith

San Diego never fails to offer the best to its many residents and tourists, so it is no surprise to find an effective and motivational trainer like Chris Keith. In fact, Chris Keith has been voted Best Personal Trainer in San Diego by many publications for many years. 

 

With his personal training fitness training career taking off in 1995, Coach Keith has quickly won the heart of San Diego with the knowledge, compassion, and experience he offers in his coaching sessions. His coaching is effective, with clients boasting about meeting their personal fitness goals due to the training. 

 

Chris Keith provides excellent training and guidance in nutrition, powerlifting, bodyweight exercise, and weight loss solutions. Among his many certifications and credentials are the following: 

 

Aerobics and Fitness Association of America

Advanced Weight Training Specialist

APEX Fitness Group

Certified Nutritionist and Aerobics Instructor

Voted BEST Personal Trainer by San Diego Magazine

 

4. Kale Pirga 

When living in the glory that is San Diego, it is easy to find excuses that help you avoid your physical fitness goals. Luckily, No Excuses Fitness Center exists to eliminate those excuses in its safe and inclusive workout environment. But as fantastic as the fitness center is, this article will spotlight one of its highly-skilled trainers, Kale Priga. 

 

Kale’s passion and enthusiasm for physical fitness and health are driven by the transformative results he experienced on his fitness journey. His clients consistently experience great improvements due to his training regimens. Whether you’re just beginning your fitness journey or are an experienced athlete, Kale’s specialized training and nutrition program will guide and support you to achieve your goals faster. 

 

There are many certifications and skills that Kale holds that allow him to offer superb training services to his clients, including the following: 

ACE Certified Personal Trainer

ACE Nutrition Specialist

ACE Behavioral Change Specialist

ACE Weight Management Specialist

Functional Training

Muscular Endurance and Hypertrophy

Strength & Conditioning

Sport Specific Training

 

5. Ashley Lane

Sports and athletics are at the heart of San Diego, and the skilled and talented Ashley Lane evidences this. Ashley Lane’s training program offers each woman a customized workout plan tailored to her physical needs and schedule. Beyond the personalized training, Ashley offers herself as an accountability partner and friend to keep pushing your forward towards your goals. 

 

What is unique about Ashley Lane’s training is that you can take it with you. Whether you’re traveling or are simply too busy to head to the gym, the ALFITCREW fitness app offers challenging workouts you can do from home. Additionally, she offers online #ALFITCLASSES hosted through Zoom, including full-body burn workouts. With the dynamic training offered by Ashley Lane, there is no doubt that she is one of the best personal trainers in San Diego. 

 

6. Ellie Huffman

If you’re looking for the perfect CrossFit coach for your kids, look no further than Ellie Huffman from CrossFit Fortius. Coach Ellie is a highly specialized coach who trains athletes of all backgrounds, including competitive athletes, kids, and adults looking to improve their overall health. 

 

Ellie is proficient in CrossFit gymnastics, nutrition, and personal training. Her skills will lead any adult or child towards an enhanced fitness regime and impressive results. Even more outstanding about Coach Ellie is her heart of compassion and attitude of grace towards everyone around her. With a coach like Ellie, any training athlete will feel assured and confident in their abilities to pursue their fitness goals. Below are the qualifications that allow Ellie to stand out from the crowd of personal trainers in San Diego: 

 

CrossFit Level 2

CrossFit Gymnastics

ACE Personal Trainer

Precision Nutrition

2017 Regional Team

2021 Semi Final Individual D1 Softball

 

7. Pedro Sun 

In our social media world, it is easy to get trapped by fad diets and other misinformation that promise a quick solution to your ideal body image. That information provides short-term or a lack of results. Seeing this trend on the rise, Pedro Sun committed to providing only science-backed nutrition and exercise data to guide their clients towards their goals. 

 

Pedro Sun is one of the best personal trainers in San Diego who provides a personalized fitness plan based on factual information, balance, and accountability. With coach Pedro, your fitness journey will be simple, enjoyable, and fun. You will see the results you crave. Pedro Sun has many certifications listed below:

 

BSc in Foods and Nutrition

CSCS – Certified Strength and Conditioning Coach

Reconciling Biomechanics With Pain Science

Cognitive Functional Therapy

Functional Therapeutic Movement

 

8. Jaylin Knight

Physical exercise and fitness do not have to be dreadful or boring. It can be enjoyable, and that is the philosophy Jaylin Knight, coach, and owner of Bootique Fitness, teaches in her personal training sessions. In her Bootique, Jaylin provides fun and individualized workouts to her clients on a one-on-one basis and in a group setting. 

 

Jaylin’s personal training program and Bootique Fitness is for the everyday girl who wants to have a good time while achieving fitness goals. Jaylin offers boot camp, dance, and Zumba through her services. You will have access to core, circuit, pre and post-natal training. Jaylin’s expertise land in the following areas: 

 

NASM Certified Personal Trainer

Certified REBT Mindset Lifecoach

Dance Instruction 

Precision Nutrition Certified Coach

 

9. Justin Orr 

Many people fear starting their fitness journey for various reasons, including being afraid of injuries. This fear is not irrational, as workout injuries happen very often. This reason drove Justin Orr, personal trainer, and owner of Iron Orr, to go into teaching and training people to reach their goals safely. After suffering an injury while preparing for the Olympics, Justin set out to create a safe and healthy approach to fitness regimes that are devoid of injuries. 

 

With the expertise acquired from decades of providing personal training to the athletes of San Diego, you can expect to meet your goals with the help of Coach Justin. He is one of the best personal trainers in San Diego who will formulate a personalized fitness plan tailored to your specific needs and goals. The following qualifications and certifications make Justin Orr one of the top fitness experts in San Diego:

 

NASM, Certified Personal Trainer 

Strength & Conditioning

Pain Relief & Muscle Gain Expert

10. Alex Cann

As a seasoned athletic coach, Alex Cann has a lot to bring to the table when providing personal training to her clients. Having coached people of all ages in the last decade, Coach Cann has the tools, resources, and skills to design a personalized fitness routine for anyone he trains. Whether your fitness goals include weight loss, strength conditioning, or a desire to increase your flexibility, he is prepared to work with you in your fitness journey. 

 

Alex Cann has trained athletes at all levels ranging from middle school students at the San Diego Unified School District to college athletes to senior citizens. As a professional educator and athlete, Coach Cann can assess your abilities and provide the perfect program fitting your needs.

 

Bachelor of Science in Exercise Science

Bachelor of Science in Physical Education

Strength and Conditioning

Obstacle Course Training

Weight Loss Management

11. Zarina Matevosian 

For those dealing with constant joint pain or are looking to increase their quality of life through exercise, Zarina Matevosian will be the perfect personal trainer for your needs. As a highly certified personal trainer, Zarina uses her love and passion for exercise to help her clients live improved life. 

 

Zarina is one of the best personal trainers in San Diego, offering a dynamic approach to training. Each training session is customized to the individual’s needs and can be held outdoors, inside the client’s home, or virtually. 

 

Strength Training

Weight Loss

Functional Training

NASM Certified Personal Trainer 

12. Javante O’Roy

For assistance in building muscle and healthily gaining weight, Javante O’Roy would be the best go-to trainer in San Diego. With an extensive background in athletics and training, Javante uses his experience and education to provide the best training programs that yield accurate results. 

 

He provides a realistic exercise plan with management assistance in nutrition and stress management. Many clients who worked with Javante experienced the results they were hoping for and, best of all, improved quality of life. 

 

Below are the certifications that allow Javante to stand out and be one of the best trainers in San Diego:

 

AAPTE Certified Personal Trainer 

Bachelor in Applied Arts & Sciences

Muscular Definition

Muscle Gain 

Sports Performance Training

13. John Turk

Only the best trainer in San Diego can help with that goal when embarking on the journey to build your best body. One of the best trainers for bodybuilding is John Turk, personal trainer and owner of Fearless Fitness. John isn’t your typical trainer. With over 30 years of experience in personal training and athletics, John knows what his clients are looking for when they come to him for their training. 

 

John Turk performed in several body-building competitions, modeled for fitness magazines, and trained police officers and competitive athletes. He has helped countless people regain control over their nutritional and fitness habits and improve their lives. If you have fitness goals that you need help reaching, John Turk will be the best trainer to seek out. 

 

NASM Corrective Exercise Specialist

NSCA Certified Strength and Conditioning Specialist (CSCS)

Nutrition Manager – American Academy of Sports Dietician’s & Nutritionists

14. Natalie Boles

The personal training program provided by Natalie Boles will be an excellent place to start for those looking for lasting lifestyle changes. As a certified trainer and owner of Agoge Solutions, Natalie delivers personalized programs to her clients built on her “Five-Pronged Approach,” which includes hydration, nutrition, fitness, stress decompression, and sleep. 

 

Natalie teaches her clients to manage these five areas through a comprehensive program and regain control over their health and wellness. This plan takes a holistic approach to exercise and nutritional science, allowing clients to take the program at their pace. With this well-rounded approach, Natalie’s clients experience consistent and lasting results that impact their lives positively for years to come. 

 

NASM Certified Personal Trainer

Institute for Integrative Nutrition

Department of Veterans Affairs National Veteran Caregiver Training Program

15. Diana Ferrer

If you’re looking to improve your health and increase your strength, Diana Ferrer is the best personal trainer in San Diego to help you out. Using her extensive education and experience in athletics and personal training, Diana will help you see an improvement in your lab work and abilities. 

 

Using training methods such as slow-motion strength training, Diana helps her clients gain the confidence and skills they need to implement physical fitness routines in their everyday lives. Many clients who work with Diana stay long-term and experience positive, lasting improvements. Here are her credentials:

 

Bachelor of Science, Kinesiology

Fitness, Health, and Nutrition 

16. Lydia Fowler

If you’re looking for a fun and caring personal trainer, we found the best personal trainer for you, Lydia Fowler. Many people know her as the Bootcamp expert as she frequently leads some of the largest Bootcamp classes in the area. However, her training programs are also noteworthy. 

 

Training with Lydia is like training with a knowledgeable friend who will provide the guidance and coaching required to meet your goals. She has helped countless people lose body fat, gain muscle, and correct injuries. 

 

National Academy of Sports Medicine – Personal Training Certificate

National Academy of Sports Medicine – Injury and Corrective Exercises Certificate

17. Reggie Carter

Your fitness goals can often make you feel alone on your journey. However, with a personal trainer like Reggie, you will receive both coaching and the moral support required to meet your goals. Whether you’re preparing for a big event or a competition, Reggie will be there every step of the way to guide you toward your goals. 

 

Reggie’s mantra is that his client’s goals become his goals as well; as they work together, nothing is off-limits. Reggie is an expert personal trainer who will help you with fitness goals like weight loss, muscle and flexibility, and stamina. Reggie’s long track record of 26 years in the fitness industry shows that his training programs work and have helped countless people live better lives. 

 

Certified Personal Trainer

Competitive Training

Weight Loss

Strength Training

 

18. Lindsey Ikeler

Many people write off personal training as an option in their journey simply because of the expense. Lindsey from Underground Fitness recognizes this challenge and provides personal training that yields tangible results at an affordable price. 

 

Lindsey’s training focuses on helping her clients exercise confidently while teaching nutritional skills to supplement and enhance their goals. She has helped many individuals throughout the area prepare for big events, lose weight, and recover from health challenges like cancer. 

 

NASM Certified Personal Training

Strength Training

Weight Loss

Functional Training 

 

19. Nina Bassler

We cannot talk about the best personal trainers in San Diego without spotlighting Nina Bassler, a personal trainer, and Co-Founder of BodyFit. Not only is Nina highly educated in everything related to exercise science, but she is also a lifelong athlete who has gained many accolades for her athletic achievements. 

 

Nina’s passion for fitness and athletics transfers daily to her clients who seek improvement in their physical abilities. With Nina’s extensive education and 15 years of personal training, you can expect to receive a fitness program specialized to your body and goals. The services she provides at her family’s gym, BodyFit, include personal training, nutritional counseling, sports training, and metabolic testing. 

 

B.S. in Exercise and Sport Science

M.A. in Kinesiology, Sport and Exercise Psychology

ACE Certified Personal Trainer

Functional Movement Screen Certified

20. Michelle Symeonides

Not everyone prefers weight lifting as a form of exercise, so we sought out Michelle Symeonides, who offers personal pilates training to her clients. Michelle uniquely approaches each client’s needs using multiple methods in her training plans. 

 

Her workout plans and classes are fun, complete with pilates, yoga, functional weight training, and other core and stretching training. You can rely on Michelle’s 20 years of experience and multiple certifications to achieve your goals and so much more.

 

Certified Personal Trainer  

Pilates & Yoga Instructor

Core & Strength Training

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May 19, 2025

Toll Brothers Building New Luxury Homes in Encinitas, Mission Valley and Clairemont

Building your new home in San Diego, California with the help of Toll Brothers will open endless opportunities to complete your luxurious lifestyle.

Building your new home in San Diego, California with the help of Toll Brothers will open endless opportunities to complete your luxurious lifestyle. Everything that sets Toll Brothers apart—the places we choose to build, our impressive architecture, personalization options to suit your style, and the seasoned experts on your team—sets you on the path to a new home you will love. Simply put, Toll Brothers builds communities in the heart of where you want to live. No matter what you’re looking for in your new home, you can be sure we have set out to build communities of luxury homes that deliver just what you want in the most desirable areas.

The Cove at Encinitas

This exclusive all-electric community offers 42 new homes in Encinitas, CA, perfectly situated less than one mile from the beach, with close proximity to recreation, shopping, dining, and freeways. The Cove at Encinitas will feature distinctive floor plans with single- and two-story designs, 3–5 bedrooms, 2.5–5.5 baths, and 1,595-4,082 sq. ft. The coastal contemporary, contemporary craftsman, and modern farmhouse architectural styles will define this new luxury coastal community.

Each home design features an open-concept floor plan with a spacious kitchen, great room, and casual dining space. Homes feature unique bonus spaces like lofts, offices, flex rooms, and bedrooms with en suite baths. The city of Encinitas offers six beaches, numerous gorgeous viewpoints, 85 acres of open space, 40 miles of trails, and 19 parks, including three sports parks, a skatepark, and off-leash dog parks. Prices start at $2.6 million.

Everly at Civita in Mission Valley

Everly at Civita offers open-concept designs ranging from 1,458–2,301 sq. ft. with 3–4 bedrooms, 2.5–3.5 bathrooms, and an attached 2-car garage. This luxury new home community features resort-style amenities, including a sparkling lagoon pool, lap pool, covered patios for year-round BBQs, a game room, and a state-of-the-art fitness club. The award-winning and highly sought-after Civita master plan offers walkability to high-end shops and restaurants in the heart of Mission Valley, and an exclusive community shuttle provides convenient access to the area’s transit system.

Choose from any of our five contemporary, three-story condo designs with expansive decks off the main living space, ideal for enjoying the city lights and summer nights. Top-rated universities, world-renowned beaches, convenient shopping, upscale dining, and proximity to major transportation hubs in San Diego make this community an excellent place to call home. Homes priced from $1.3 million.

Mira Vista in Clairemont Mesa

Mira Vista is a new home community featuring 3-story townhome-style condos with 3–4 beds and 2.5–3.5 baths centrally located in Clairemont Mesa with access to Mission Bay Park, Pacific Beach, freeways, shopping, and dining.

Take it all in from a stunning vantage point within San Diego’s Clairemont Mesa. This exclusive new home community features just 40 home sites offering exquisite views of the surrounding open space and beautiful new construction luxury townhome-style condos with three levels of living space. Each home design in Mira Vista perfectly reflects the coastal style in this sought-after Bay Park neighborhood close to upscale shopping and dining and a plethora of world-class recreation. Priced from $1.2 million.

The Luxury of Choice

Home buyers can explore a wide selection of design options at the Toll Brothers Design Studio. The state-of-the-art Design Studio allows home buyers to choose from a wide array of selections to personalize their dream home with the assistance of Toll Brothers professional Design Consultants.

With your selections from premium products, state-of-the-art appliances, and luxury fixtures and finishes, your Toll Brothers home becomes a showcase for your individual style and preferences.

To view Toll Brothers homes in San Diego visit their website.

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May 19, 2025

Jamul Casino Resorts Revolutionizes Hospitality Connectivity with a 10GB Cox Business Bandwidth Leap

Jamul Casino Resort is set to redefine guest experiences in the hospitality industry with a groundbreaking upgrade to a 10GB bandwidth provided by Cox Business.

Jamul Casino Resort, under the technology leadership of Tara Sparks, is set to redefine guest experiences in the hospitality industry with a groundbreaking upgrade to a 10GB bandwidth provided by Cox Business. This initiative promises to deliver seamless, high-resiliency network connectivity across the integrated boutique Casino Resort property, ensuring guests enjoy uninterrupted service from luxury hotel suites to the bustling casino floor.

Sparks, celebrated for her unconventional approach to solving tomorrow’s challenges today, merges audacious creativity with strategic precision. Her ability to pivot between strategic ideation and execution accelerates organizational innovation and fosters a culture of fearless experimentation. 

“Tara has been instrumental in moving away from outdated infrastructure offerings to dynamically allocate bandwidth based on real-time demand,” stated Charles E. Daniel, Jr., Vice President of Information Technology for Jamul Casino.

This upgrade is hailed as a quantum leap for Jamul Casino resort in connectivity, promising frictionless transitions between hotel rooms, luxury suites, and elegant hotel and gaming spaces without latency. The result will be enhanced guest experiences with DigiValet iPad tablets and Alexa in-room voice-controlled commands.

Sparks emphasizes, “This isn’t just about faster Wi-Fi; it’s about future-proofing Jamul Casino Resort’s hospitality and gaming as a gateway to an immersive, connective technology experience.”

Sparks worked closely with Cox Business Sales Executive Lauro “JC” Teopengco III and Sales Engineer Clark Fryrear. As casinos and hotels race to elevate, one thing is clear: Jamul Casino Resort and Cox Business have dealt with the hospitality and gaming industry a winning hand.

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May 15, 2025

Hit the Road: Our Annual Road Trip Guide 

Three of our favorite summer destinations are just a car ride away Gone are the days of stuffing a backpack with snacks and whatever’s clean, hopping in the car, and following the open road with nothing but our hearts and a printed-out sheet of Mountain Dew-stained Mapquest directions as our guide. Now that we’re adultier adults, we plan.  The great state of California is filled with highways and byways that lead to the destination you’ve been dreaming of—even if you’re not quite sure what that is yet. Don’t worry, we can help with that. Consider distance, for one. A long […]


Three of our favorite summer destinations are just a car ride away

Gone are the days of stuffing a backpack with snacks and whatever’s clean, hopping in the car, and following the open road with nothing but our hearts and a printed-out sheet of Mountain Dew-stained Mapquest directions as our guide. Now that we’re adultier adults, we plan. 

The great state of California is filled with highways and byways that lead to the destination you’ve been dreaming of—even if you’re not quite sure what that is yet. Don’t worry, we can help with that. Consider distance, for one. A long leisurely drive up the coast sounds relaxing, adventurous, even romantic—unless you’re riding in an SUV filled with kids asking the age-old question: “Are we there yet?”

Our annual Road Trip Guide is your roadmap for success, and these destinations are some of our top picks for a quick trip, a weekend getaway, or a stretched-out summer sojourn. 

Load up the trunk, rev the engine, and let’s hit the road. 

Carmel-by-the-Sea

Let sparks fly in Carmel-by-the-Sea. This idyllic village off Pacific Coast Highway along the Central Coast has been rated the third best city for romance in the world (after only Venice and Paris) by Travel & Leisure. After a picturesque drive along Carmel’s Scenic Road, you’ll be treated to one-of-a-kind experiences, cozy stays, and amazing food (there are more than 60 restaurants in the one-square-mile village). And don’t miss the eclectic art, shopping, and live theater—all within walking distance. Wine lovers will appreciate Carmel-by-the-Sea’s 18 wineries and tasting rooms, plus a self-guided wine walk mobile guide accessible for free on your smartphone.

Conejo Valley

In search of an inland adventure? Look no further than the Conejo Valley. Around 3 ½ hours from San Diego and just a short drive from LA, this hidden retreat offers the ideal mix of outdoor beauty and relaxation—without the crowds. Hikers and bikers will appreciate the region’s scenic trails along rolling hills, breathtaking views of the sweeping valley, and fresh air. After a day on the trails, taste your way through the Conejo Valley’s diverse dining scene. Keep an eye out for special events during your stay, like fun community events, concerts, and local theater productions. Whether you’re chasing sunsets or savoring local flavors, your perfect getaway starts here. 

Ventura

Even sunny San Diego can get old after a while. Cruise up the coast and experience an affordable beach vacation in Ventura, where you don’t have to break the bank for an ocean view. This hidden gem just north of Los Angeles is known for amazing surf spots perfect for surfers of all levels. There’s even a protected beach that’s gentle enough for the smallest of swimmers. Find hidden treasures thrifting in Ventura’s charming downtown area, and if adventure is calling, visit the Channel Islands National Park and say hello to the adorable island foxes.

Don’t Forget to Bring … 

Entertainment—A rocking playlist or intriguing podcast can make the hours on the road fly by. Just don’t get so into it you miss your exit.

Chargers—Make sure you have a charger that works with all of your devices and works in the car. We cannot stress this enough, check this in advance. You don’t want to get stuck without access to maps or able to make an emergency call.

A map—Your internet connection may get spotty. It helps to have a backup way
to get around.

Snacks and drinks—Save your hard-earned dollars and avoid convenience store grub by packing a cooler with snacks and drinks from home. Bonus points if they’re somewhat healthy.

Car maintenance kit—Probably not the most fun part of road trip planning, but you’ll thank us later if you happen to get a flat tire or need a jump.

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May 13, 2025

SDSU researchers spent 12 days at sea identifying potential hazards to coastal communities

Written by Bryana Quintana About 70% of earth’s surface is ocean, yet only 5% of the world’s oceans have been explored. One matter overlooked by the general public and scientific circles alike is how shifting faults and landslides thousands of feet under the water can lead to earthquakes and tsunamis on land. This is what San Diego State University associate professor Jillian Maloney and her team of researchers spent 12 days at sea investigating.  “These are hazards to people living in Southern California and making sure we’re prepared for these kinds of disasters saves lives and protects infrastructure,” Maloney said.  […]

Written by Bryana Quintana

About 70% of earth’s surface is ocean, yet only 5% of the world’s oceans have been explored. One matter overlooked by the general public and scientific circles alike is how shifting faults and landslides thousands of feet under the water can lead to earthquakes and tsunamis on land.

This is what San Diego State University associate professor Jillian Maloney and her team of researchers spent 12 days at sea investigating. 

“These are hazards to people living in Southern California and making sure we’re prepared for these kinds of disasters saves lives and protects infrastructure,” Maloney said. 

In Southern California, earthquakes are the primary cause of most large underwater landslides. Tsunamis can be triggered by earthquakes or sizable landslides which move huge volumes of sediment from higher to lower elevations, displacing large amounts of water. 

Local faults like the San Andreas are well-studied and can be more easily monitored because they are on land. But faults far off the coast and well below the water are much more difficult to study and even detect. 

That’s where the Research Vessel (R/V) Sally Ride came in. The vessel, managed by Scripps Institution of Oceanography, is equipped with specialized scientific instruments and used exclusively for research. 

With funding from the UC Ship Funds Program and a mission to map the seafloor to better predict and protect coastal communities from natural disasters, Maloney’s crew set out for the waters around San Clemente Island. About 100 miles off the San Diego coast, they saw nothing but blue sky, ocean and the occasional small island for nearly two weeks.

The team used the boat’s sonar technology to map the region’s complex topography, generating images showing the faults, tectonic segments and landslides hidden beneath the water.

“We identified faults that appear to be recently active, and that is an indication that they do pose a hazard,” Maloney said. “We identified new faults that could have earthquakes that we didn’t know about before and we did identify repeated landslide deposits, an indication that tsunamis are another hazard we should be considering.”

Maloney’s team also conducted sediment coring — quickly dropping a 10-foot tube into the water to extract a section of sediment that reflects thousands of years of seafloor history. Examining the cores for changes in sediment reveals when landslides, earthquakes and other natural events occurred. This informs on future risks.

SDSU researchers embark on a scientific mission off the coast of San Diego.
SDSU researchers embark on a scientific mission off the coast of San Diego. Credits: Andrea Fabbrizzi / San Diego State University


“Besides new fault segments and new submarine landslides, we found that there may be smaller landslides that we are not able to see on a sediment core,” said the project’s chief scientist, postdoctoral researcher Andrea Fabbrizzi. “That could be very important because having more ‘invisible’ landslides can change the seismic and tsunami hazard for coastal California.”

“Geological features that we don’t see are out there and must be investigated more to have a better picture of the hazard those features represent for global coastal regions,” he added.

Maloney emphasized that offshore faults and landslides must also be included in hazard assessments, just as cities account for seismic activity on land when developing building codes and emergency plans. Recognizing these threats is key for such large metropolitan areas — whose critical infrastructure includes communications cables running along the global seafloor which transfer more than 95% of the world’s data

“Earthquakes and tsunamis, we know from experience, are hazardous to life and property. A landslide that breaks a communication cable could be a big deal for people living here, or anything that’s on the seafloor,” Maloney said. “So we hope this work can get us closer to understanding the possibility of those affecting us so that we can be better prepared.”

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May 12, 2025

Artist in Focus: Iydeen Younis, San Diego Food Photographer

We partnered with Sony Electronics to tell the stories of the people building San Diego’s culture from the ground up

Artists in Focus: Iydeen Younis | Sony Electronics

San Diego’s got no culture. San Diego is a tourist town. San Diego is a nice place to retire.

Meanwhile cranking away under those well-worn clichés, the city’s creative edge is its best-kept secret. San Diego Magazine and Sony Electronics have partnered to tell the stories of the people building that culture from the ground up. 

Episode 2: Iydeen Younis, Photographer


“English is my third language, so I’m not always comfortable expressing myself in words. Photography lets me communicate with everyone.”

Photography as a language, a universal translation. Iydeen Younis knows this well. Her family was relocated to San Diego when she was five years old after their village was destroyed. As a young kid who didn’t speak the language, the camera was how she spoke. She used it to document her family’s new life.

Iydeen’s parents wanted her to become a doctor, a lawyer, something big and stable and safe with some important-looking letters after it. But she felt the need to tell people’s stories, capture rare moments, document good work being done. Now she shoots in kitchens across the city, like @cicciaosteriasd, helping the people of the food and drink culture translate what they’ve created. 

This is her story. Stay tuned for more. Shot On Sony FX6 and a7S III cameras at Ciccia Osteria in Barrio Logan.

To learn more about Sony’s Alpha 7 III full-frame hybrid camera, click here. #Shot On Sony #SonyCommunity

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