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Reposted by Dr. Lucy Jones Center

Lucy Jones @drlucyjones.bsky.social · 09/12/2025

Again, Kyle and Judith provide a great summary of the science around this earthquake

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Reposted by Dr. Lucy Jones Center

Lucy Jones @drlucyjones.bsky.social · 02/12/2025

Sometimes, music is the only tool I have for coping with the world. youtu.be/2Xj0KSgD24k?...

youtu.be

This Land Is Your Land

YouTube video by delreyjones

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Lucy Jones @drlucyjones.bsky.social · 06/08/2025

Only the Rialto events are aftershocks to the July 31 M4.3. The Lytle Creek events are near the San Andreas but not necessarily on it. We often see small events around the San Andreas but some analyses suggest they are on small faults not the main surface that will move in the big quakes.

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Lucy Jones @drlucyjones.bsky.social · 06/08/2025

In the last 24 hours, we have seen several M3s in 3 locations. The events near Ontario are at the western end of the Fontana trend. The Lytle Creek events are near the San Andreas & the Rialto events are where the Fontana trend intersects the San Andreas. Last week's M4.3 was at the Rialto location

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Lucy Jones @drlucyjones.bsky.social · 03/08/2025

The New York - Philadelphia - Wilmington urban corridor has felt small earthquakes roughly every 2-3 years. Moderately damaging earthquakes strike somewhere in the urban corridor roughly twice a century. So infrequent but not weird

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Lucy Jones @drlucyjones.bsky.social · 31/07/2025

On the M4.3 on the Fontana trend

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Lucy Jones @drlucyjones.bsky.social · 31/07/2025

Looks like a small swarm in the Fontana trend. This M4.2 had a few foreshcoks including a M3.0. The Fontana trend is a NE-striking lineation of earthquakes under the sediments of the San Bernardino Vslley. We believe it is one of the left-lateral striking faults that are south of the San Gabriels.

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Lucy Jones @drlucyjones.bsky.social · 30/07/2025

I’m seeing lots of questions about whether the rate of great earthquakes is changing or whether climate change affects earthquakes. The answer is no. The long term rate of these big events is about 1/decade. But the distribution is random. The last one was 2011 in Japan

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Lucy Jones @drlucyjones.bsky.social · 30/07/2025

The 7/29/2025 M8.8 looks like a repeat of an earthquake in 1952

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Dr. Lucy Jones Center @dljcss.bsky.social · 30/07/2025

An 8.7M earthquake in Russia has prompted a tsunami watch along the entire #California coast. @drlucyjones.bsky.social takes a closer look at the initial temblor and what the watch means in this NBC LA interview: www.youtube.com/watch?v=Uw2E...

youtube.com

Tsunami watch issued for California coast. Dr. Lucy Jones explains what that means

YouTube video by NBCLA

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Dr. Lucy Jones Center @dljcss.bsky.social · 30/07/2025

@drlucyjones.bsky.social joins KTLA5 to discuss the California coast #tsunami watch following the 8.7M quake in Russia. Watch the full interview: www.youtube.com/watch?v=NuKG...

youtube.com

California coast under tsunami watch after Russia earthquake

YouTube video by KTLA 5

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Reposted by Dr. Lucy Jones Center

Dr. Wendy Bohon @drwendyrocks.bsky.social · 17/07/2025

In addition to many M7+ earthquakes, this boundary has also hosted half a dozen M8+ earthquakes. Red circles mark the epicenter above the site where fault rupture began, and yellow shows the area on the megathrust fault that ruptured.

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Lucy Jones @drlucyjones.bsky.social · 24/06/2025

Even very small quakes can be felt if you are nearby (and a shallow quake is closer to people on the surface). But there is not much to be said about an M2.7 except that it happened earthquake.usgs.gov/earthquakes/...

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Lucy Jones @drlucyjones.bsky.social · 24/06/2025

I once had a M2.7 directly under my house that felt so strong I went to work without waiting for a page (in pre-Internet days). It's a good reminder that how strong the shaking feels has much more to do with how close you are to the event. Duration of shaking is better for guessing magnitude.

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Reposted by Dr. Lucy Jones Center

Lucy Jones @drlucyjones.bsky.social · 08/06/2025

This study uses "overdue" to mean that time time since the last quake is longer than the average time between earthquakes. But that doesn't mean the next quake is more likely in the near future. The length of intervals between events is very variable even at one location.

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Lucy Jones @drlucyjones.bsky.social · 07/06/2025

This does not mean the big earthquake is more likely. Whatever is making for long intervals is happening now.

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Dr. Lucy Jones Center @dljcss.bsky.social · 21/05/2025

A new study outlines the flooding risk from a magnitude 9 quake along the 700-mile Cascadia fault line.@drlucyjones.bsky.social explains that while we could still see damage for coastal areas, the fault line is offshore, so the heaviest shaking would be underwater. Watch her full interview on ABC7:

abc7.com

Could monster 9.0-magnitude earthquake sink part of CA's coastal communities?

Could a monster earthquake sink a portion of Northern California? A new study calculates the risk of where and how much land could sink, but experts say there's something else closer to home that we s...

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Dr. Lucy Jones Center @dljcss.bsky.social · 06/05/2025

Last week, @drlucyjones.bsky.social gave a lecture at the Newport Beach Public Library, providing insights on earthquake prediction, the importance of resilient structures, and why knowing your neighbors may matter most. Read more on the @latimes.com: www.latimes.com/socal/daily-...

latimes.com

O.C. residents pack Newport Beach hall to talk tectonics and tremors with seismologist Lucy Jones

About 100 people came out to learn from seismologist Dr. Lucy Jones at the Newport Beach Public Library's Friends Room Wednesday evening.

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Reposted by Dr. Lucy Jones Center

Lucy Jones @drlucyjones.bsky.social · 24/04/2025

I've partnered with OcTech, Caltech's choral octet, to create Courage To Care: a concert & discussion to process climate angst in a time of historic fires. If you're in SoCal, come build community with us! Sunday, April 27th, 7:30 PM Dabney Lounge on the Caltech campus Tickets: No tickets - free!

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Dr. Lucy Jones Center @dljcss.bsky.social · 16/04/2025

@drlucyjones.bsky.social joined KCAL News today to discuss the recent 5.2-magnitude earthquake in #SanDiego County, noting a relatively large aftershock sequence. In the same interview, she also addressed the overall earthquake activity in #SoCal ▶️: www.youtube.com/watch?v=rFJ1...

youtube.com

Seismologist Dr. Lucy Jones discusses Monday’s 5.2-magnitude earthquake

YouTube video by KCAL News

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Reposted by Dr. Lucy Jones Center

Lucy Jones @drlucyjones.bsky.social · 15/04/2025

Interesting to look at the detailed relocations of the aftershocks to the M5.2. It looks like they are not on the main strand of the Elsinore fault.

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Lucy Jones @drlucyjones.bsky.social · 14/04/2025

Earthquake Early Warning requires estimating the magnitude from the first few seconds on just a few stations. It is always very rough but lets us get out something quickly. There is a lot of variation between locations. The final magnitude averages 100+ stations and is always more accurate

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Lucy Jones @drlucyjones.bsky.social · 14/04/2025

The USGS produces a nice quantification of the risk of aftershocks. 7% chance of another M5 and less than 1% chance of being followed by a M6.

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Reposted by Dr. Lucy Jones Center

Lucy Jones @drlucyjones.bsky.social · 14/04/2025

Today's M5.2 is the largest quake near the Elsinore fault since I came to California in 1983. But there were quite a few M4s along the way. A junior sibling to the San Andreas, the Elsinore is long enough to have given us some bigger events

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Dr. Lucy Jones Center @dljcss.bsky.social · 02/04/2025

A 7.7 quake struck Myanmar on Friday, killing over 2,000 people and shaking buildings as far as Bangkok. What caused this quake, and could it happen in the US? @drlucyjones.bsky.social joined ForbesWomen’s Maggie McGrath to answer these questions and more ▶️ www.youtube.com/watch?v=sc-v...

youtube.com

Why The Myanmar Earthquake Death Toll Could Be '10 Times To 100 Times' Higher Than Reported

YouTube video by Forbes Breaking News

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Reposted by Dr. Lucy Jones Center

Lucy Jones @drlucyjones.bsky.social · 02/04/2025

I was proud to be a federal scientist at the USGS for 33 years. "Earth science in the public service" meant I could focus on creating and explaining science for public officials and providing public education, not just educating students at one university. theconversation.com/us-earthquak...

theconversation.com

US earthquake safety relies on federal employees’ expertise

The US experiences violent earthquakes, but the damage and death toll is much lower than in many countries because of the work of federal seismologists and engineers.

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Dr. Lucy Jones Center @dljcss.bsky.social · 02/04/2025

#AirTalk with Larry Mantle celebrates 40 years on air, with leading voices joining to help listeners better understand the many facets of L.A.—from science to politics to history. Hear from guests, including seismologist @drlucyjones.bsky.social in this special episode: laist.com/shows/airtal...

laist.com

40 years of AirTalk

Today on AirTalk, we are celebrating the 40th anniversary of the very first live airing of AirTalk with Larry Mantle. Join us on a journey through the ages as we look back at the show's history and ho...

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Reposted by Dr. Lucy Jones Center

Alissa Walker @awalkerinla.bsky.social · 01/04/2025

After the fires, the only person I wanted to talk to was @drlucyjones.bsky.social. I was so thrilled to be able to sit down with her for this interview for Dwell. Our conversation about LA's future was, at times, painfully honest — but ultimately very hopeful

dwell.com

“We’re Going to Have Something Worse”: What Dr. Lucy Jones Says Will Make L.A. More Fire Resilient

The city’s seismologist turned climate disaster expert wants better building codes but isn’t waiting around for them.

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Reposted by Dr. Lucy Jones Center

Lucy Jones @drlucyjones.bsky.social · 31/03/2025

Quakes cause shaking at a range of frequencies. The lowest frequencies are controlled by the length of the fault that moves in the quake. A 400km long fault creates longer wave length (lower frequency) waves than a 10km long fault. So all quakes produce hi frequencies but only big quakes have low.

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Lucy Jones @drlucyjones.bsky.social · 30/03/2025

The high rise that collapses in Bangkok would have lower design standards than a building in LA. But notice the very long period (slow) motions in Bangkok. The long period waves travel farther and affect taller buildings, so collapsing a high rise while smaller buildings are ok is to be expected.

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Reposted by Dr. Lucy Jones Center

Lucy Jones @drlucyjones.bsky.social · 30/03/2025

This earthquake is similar to what we think happened in 1906 in northern California - that was a M7.7 with 440km rupture length. The strong shaking in Bangkok at ~600km distance is like a quake in San Francisco causing damage in LA. www.youtube.com/watch?v=oRuk...

youtube.com

LIVE: Bangkok Earthquake 'Capable of Causing Extreme Damage': Scientist | Myanmar Earthquake | N18G

YouTube video by Firstpost

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Lucy Jones @drlucyjones.bsky.social · 30/03/2025

This is an excellent post, summarizing the scientific data from the Myanmar earthquake. The long fault and close proximity to major cities indicate a high level of damage and we should expect the death toll to rise. But the ongoing civil war near Mandalay suggests we may never know.

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Lucy Jones @drlucyjones.bsky.social · 28/03/2025

This could be devastating. This is strike-slip mechanism on a plate boundary, much like the 1906 quake on the San Andreas. The rupture length is at least 300km. The capital, Yangon, is near the fault, but I can’t yet see if the fault ruptured towards Yangon or away from it

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Lucy Jones @drlucyjones.bsky.social · 17/03/2025

Small quakes do not prevent big quakes. It takes 1000 M3s to relieve the stress of one M5. It does slightly increase the chance of more just because the rate is up. As a seismologist with almost 50 years experience looking at quakes, I am thinking "How interesting. I wonder what will be next?"

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Lucy Jones @drlucyjones.bsky.social · 17/03/2025

The Malibu quakes: There have now been 12 M≥3.0 quakes in approximately the same location north of Malibu since February 2024. In comparison, the previous 25 years had 7 M≥3s in the same location. A couple are clear aftershocks (within a few hours of a larger event), but the others are spread out

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Lucy Jones @drlucyjones.bsky.social · 13/03/2025

Wow! I'm honored that KUSC wanted to include me as a woman making history - in music! I've only got one composition to my name so this is very special. www.kusc.org/articles/wom...

kusc.org

Women Who Made (Musical) History - Classical KUSC

Celebrating Women's History Month with a look at influential women in classical music, from Hildegard Von Bingen to Dr. Lucy Jones, who broke barriers and made history.

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Dr. Lucy Jones Center @dljcss.bsky.social · 11/03/2025

Does climate change have any impact on #LosAngeles earthquakes? @drlucyjones.bsky.social sat down with NBC Los Angeles on Monday, March 10, to discuss recent seismic activity along the #Malibu Coast fault system. Watch the full interview here: www.nbclosangeles.com/on-air/does-...

nbclosangeles.com

Does climate change have any impact on Los Angeles earthquakes?

Seismologist Dr. Lucy Jones said there have been more activities along the Malibu Coast fault system.

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Lucy Jones @drlucyjones.bsky.social · 10/03/2025

I was out on a walk during the M4.1 quake. Not much to say about it. Run-of-the-mill for earthquake country. The most interesting thing is that it is the 3rd M4 at essentially the same location over the last 13 months.

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Lucy Jones @drlucyjones.bsky.social · 03/03/2025

A M3.9 in North Hollywood. Too small to definitively assign to any fault, but the closest is the Hollywood fault. Yawn. Nothing much to say about an earthquake in earthquake country. I am in Boston and am heading back to sleep.

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Lucy Jones @drlucyjones.bsky.social · 11/02/2025

It's essentially impossible to definitively assign a small quake (with fault area ~100m) at 8 km depth to a fault we map at the surface. But these look like they could be on the San Andreas itself which is relatively rare. The focal mechanisms align with the fault orientation

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Dr. Lucy Jones Center @dljcss.bsky.social · 05/02/2025

After the January 2025 #LAfires burned thousands of homes in Altadena, Pasadena, and the Pacific Palisades, the @caltech.edu Science Exchange asked @drlucyjones.bsky.social to share her insights on how communities recover from natural disasters.

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Dr. Lucy Jones Center @dljcss.bsky.social · 24/01/2025

“Emergency management is not just response,” @drlucyjones.bsky.social concluded in that report. “It is developing resilience before, responding efficiently during, and recovering quickly after a disaster.” Explore the full column on @latimes.com: www.latimes.com/california/s...

latimes.com

Column: Earthquakes and fires always stalk L.A. But our greatest danger is denial.

Denial and defiance: In Southern California, human nature -- rather than fires and earthquakes -- may be our undoing

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Lucy Jones @drlucyjones.bsky.social · 24/01/2025

The California Earthquake Authority gives $3000 grants for seismically retrofitting your home. Registration is open now. See if you qualify at www.californiaresidentialmitigationprogram.com/our-seismic-...

californiaresidentialmitigationprogram.com

CRMP Retrofit Grant Program Registration Process (EBB & ESS)

You can register for the Earthquake Brace + Bolt (EBB) and the Earthquake Soft-Story (ESS) programs when registration is open. Registration is offered for a limited time, at least once per year, for e...

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Dr. Wendy Bohon @drwendyrocks.bsky.social · 16/01/2025

“After a wildfire, the hazard to the public is not over,” said Jeremy Lancaster, California’s state geologist. …The two major hazards after a wildfire are flash flooding and post-fire debris flows.” www.nytimes.com/2025/01/16/c...

nytimes.com

The Next Threat to L.A.? Rainfall That Could Cause Landslides

While firefighters begin containing the Los Angeles wildfires, the land left behind is at a higher risk of floods and debris flows.

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Dr. Lucy Jones Center @dljcss.bsky.social · 09/01/2025

@drlucyjones.bsky.social joined @abc7.bsky.social yesterday to talk about the people who have had to evacuate due to the fast-moving fires and what they’re going through from a mental and emotional perspective: ▶️ www.youtube.com/watch?v=BR2K...

youtube.com

Southern California brush fires: Live Coverage via KABC

YouTube video by ABC News

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Reposted by Dr. Lucy Jones Center

Lucy Jones @drlucyjones.bsky.social · 08/01/2025

I'm in Pasadena, smelling the #EatonFire. I activated the group text for a disaster group that planned together last year, checking in, seeing if anyone needs help. One person has been evacuated and needed help. We all felt better for doing something. Helping neighbors is the most powerful response.

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