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Caltech Seismological Laboratory @caltechseismo.bsky.social · 5h

Meet Leonid Pereiaslov, a Seismo Lab Grad Student who specializes in Bayesian inversion of InSAR, GNSS, and tsunami data to model co- and post-seismic slip and quantify its uncertainty! #SeismoLabSpotlight

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 8h

#EQHistory The 1983 Coalinga M6.5 earthquake had shocked the earth science community that such a large earthquake could occur on a fault that couldn’t be seen on the surface.

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 30/09/2026

Congratulations to Caltech Seismo Lab alumnus Xiaodong Song, recipient of AGU’s 2026 Inge Lehmann Medal! The medal recognizes outstanding contributions to our understanding of the structure, composition, and dynamics of Earth’s mantle and core.

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Past Recipients of the Inge Lehmann Medal | AGU

View past recipients.

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 29/09/2026

Last week, the U.S. Geological Survey and the Caltech Seismological Laboratory cohosted the U.S.-Japan Natural Resources Panel on Earthquake Research (UJNR). The UJNR Panel is the official government-to-government exchange between our two countries on this topic, and promotes advanced research ...

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 19/09/2026

Tres sismos grandes que han afectado la Ciudad de México ocurrieron un 19 de septiembre y eso ha llevado a algunas personas a pensar que hay algo especial en esa fecha. Pero la probabilidad de que ocurran, por pura casualidad, 3 sismos grandes en la misma fecha del calendario es alrededor de 1 en 3.

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Revista ¿Cómo ves? - Divulgación de la Ciencia, UNAM

¿Cómo ves? Revista de Divulgación de la Ciencia de la UNAM

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 18/09/2026

#FieldPhotoFriday takes us to a remote station in the Turquoise Mountains. A power charger update is planned soon to minimize fluctuations and keep the station running reliably. This background maintenance helps keep the SCSN resilient and ready. #ShakeAlert #CalOES

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 14/09/2026

The Swarm near #Lennox, CA, #Earthquake is confirmed valid. The largest so far is M2.7 on 9/12/26 with 116 events in the sequence as of the time of this post. Note that this sequence is normal for the area, with a nearby swarm just like it to the NW in 2021. Updated info available @ buff.ly/CmMkBzE

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Latest Earthquake Information | SCSN

For data archive access visit SCEDC

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 11/09/2026

Our team recently visited a station in the Los Padres National Forest that has been recording seismic activity since 2021. This site received a new solar panel and batteries to ensure the station can continue recording earthquakes day and night! #ShakeAlert #CalOES

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 04/09/2026

Today marks Margaret Vinci’s retirement after 33 extraordinary years of service to the Southern California Seismic Network, the Caltech Seismological Laboratory, and many communities throughout California.

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 04/09/2026

#FieldPhotoFriday In honor of #NationalWildlifeDay we went through and found some pictures of the times when the field crew encountered animals! Some of our stations are hosted on farms around the state so plenty of farm animals and the occasional wild animal!

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 01/09/2026

Another Seismo Lab presentation from Samantha Stanley at #SCEC2026 today! Presenting “Representations of earthquake prediction, forecasting, and early warning in popular media,” examining how earthquake early warning, aftershock forecasting, and prediction are portrayed in fictional films.

pie charts showing amounts of time concepts appear on screen

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 01/09/2026

Another Seismo Lab presentation at #SCEC2026 today! Samantha Stanley presents “Great social science for great earthquakes,” an interactive poster session crowdsourcing ideas from SCEC participants about the social factors that come into play in the context of a large earthquake.

academic poster showing concentric circles to collect ideas and explanations of the ShakeAlert project

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 31/08/2026

Postdoc Jingchuan Wang, who's looking at simulating tsunamis generated by seismically triggered landslides and Grad student Qian Shi, who's looking at conditions for runaway ruptures during reservoir operations both gave lightning talks at SCEC today, a great way to highlight their work! #SCEC2026

Postdoc Jingchuan Wang, SCEC 2026 Lightning talk

Grad student Qian Shi SCEC 2026 Lightning talk

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 31/08/2026

Another Seismo Lab presentation at #SCEC2026 today! Tom Heaton presents “There are no Earthquake Cycles,” exploring how earthquake ruptures occur as localized pulses of slip that are dynamically chaotic, and what that means for how we think about earthquake behavior and recurrence. #Seismology

Figure on Fractal Shear Stress on a Plane from Heaton presentation

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 30/08/2026

Weekly Earthquake Stats: 23 Aug 2026 - 29 Aug 2026. There were 600 events this week ranging from M -0.21 to 3.96. Check out our weekly playback map and visit www.scsn.org for detailed information. #earthquakes #seismology #SCSN #weeklystats @CaltechSeismo

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 30/08/2026

The 2026 SCEC Annual Meeting begins today in Palm Springs! Throughout the conference, we’ll be highlighting some of the Seismo Lab members presenting their latest research, so keep an eye out. #SCEC26

central.scec.org

Toward an AI-Enhanced Near-Real-Time Earthquake Cataloging System for the Southern California Seismic Network | Statewide California Earthquake Center

Central Functions

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 28/08/2026

#FieldPhotoFriday It's National Red Wine Day, so this week's site is a bit closer to home, The Athenaeum’s wine cellar on the Caltech Campus! Due to its proximity Margaret occasionally stopped by on her tours. It isn’t often that you see cases of fine wine on a solid platform with seismic equipment!

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 26/08/2026

Meet Nadira Sose, a Seismo Lab Staff Member who works as a Technical Documentational Analyst for SIS!! #SeismoLabSpotlight

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 26/08/2026

Earlier today, Margaret Vinci was recognized by the ShakeAlert System Executive Committee and the ShakeAlert Commissioners, Education, Outreach, and Technical Engagement Core Committee for 33 years of exemplary service to earthquake preparedness, safety, and communication!

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 23/08/2026

Weekly Earthquake Stats: 16 Aug 2026 - 22 Aug 2026. There were 466 events this week ranging from M -0.04 to 3.64. Check out our weekly playback map and visit www.scsn.org for detailed information. #earthquakes #seismology #SCSN #weeklystats @CaltechSeismo

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 21/08/2026

#FieldPhotoFriday For 11 years so far, this seismic station has been upgraded, maintained, and looked after by our hard working field crew. These photos from visits over the years show the ongoing work that keeps the network modern, resilient, and ready when SoCal shakes. #ShakeAlert #CalOES

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 20/08/2026

What a wonderful conclusion to this year’s Earthquake Fellows program! Last weekend, the Fellows shared the results of their research with the Seismo Lab community, family, teachers, and school administrators. A reception followed to celebrate their hard work, growth, and success! Congrats, Fellows!

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 14/08/2026

#FieldPhotoFriday Now that the crew is back from last week's station they shared that they had a visitor! With how hot it is out there, it's no wonder the local wildlife, in this case a wary coyote, uses the site for the little bit of shade it provides! #ShakeAlert #CalOES

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 13/08/2026

This week the lab was visited by a group from NBC for some Earthquake 101 training! These kinds of visits ensure that everyone is better prepared to share critical information with the public when a major quake occurs!

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 11/08/2026

Many of the earthquake products and tools that seismologists use and share are collaborative. They often take input from many organizations and people to produce, maintain, and innovate! Last week's ShakeMap workshop in Golden, CO is a great example of this!

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 09/08/2026

Weekly Earthquake Stats: 02 Aug 2026 - 08 Aug 2026. There were 303 events this week ranging from M -0.35 to 3.01. Check out our weekly playback map and visit www.scsn.org for detailed information. #earthquakes #seismology #SCSN #weeklystats @CaltechSeismo

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 07/08/2026

#FieldPhotoFriday Even seismic stations need fresh batteries! Yesterday, our crew worked through the heat to replace batteries causing intermittent outages and restore reliable monitoring, because earthquakes don’t take hot days off. (Photos from an earlier visit.) #ShakeAlert #CalOES

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 05/08/2026

Meet Eli Bird, a Seismo Lab Grad Student who works on understanding the Earth's seismic structure and its temporal variations on dense seismic arrays! #SeismoLabSpotlight #Caltech

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 02/08/2026

Weekly Earthquake Stats: 26 Jul 2026 - 01 Aug 2026. There were 309 events this week ranging from M 0.11 to 3.33. Check out our weekly playback map and visit www.scsn.org for detailed information. #earthquakes #seismology #SCSN #weeklystats @CaltechSeismo

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 01/08/2026

July EQ History: 7/21/1952 Kern County EQ, M7.5 - struck 23 mi south of Bakersfield on the White Wolf fault. It was the largest SoCal quake since 1857 and felt from Reno to San Diego. 12 killed, $50M+ damage. The fault was only ~30 mi long, surprisingly short. buff.ly/fCd2rEu

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 31/07/2026

#FieldPhotoFriday This desert station got a visit back in May, before the summer heat really turned up the dial. That was good timing for the field crew, it’s projected to reach 104°F there today! But when the network needs attention, even the heat doesn’t always keep them away. #ShakeAlert #CalOES

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 28/07/2026

Our thoughts are with everyone affected by the damaging earthquake in southern Japan, especially those who have lost loved ones or are awaiting news. Earthquake Insights provides more scientific context on the earthquake and the region: buff.ly/Ro88nlF

earthquakeinsights.substack.com

Southern Japan struck by deadly M6.8 earthquake

A reminder of the neighboring 2016 Kumamoto M7.0 earthquake

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 26/07/2026

Weekly Earthquake Stats: 19 Jul 2026 - 25 Jul 2026. There were 332 events this week ranging from M -0.19 to 3.62. Check out our weekly playback map and visit www.scsn.org for detailed information. #earthquakes #seismology #SCSN #weeklystats @CaltechSeismo

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 24/07/2026

#FieldPhotoFriday In May, our field crew braved a windy day near Furnace Creek. They repaired a deteriorated GPS connection, GPS antenna, noisy sensor, and more. The work restored clock quality from 10% to 100%, keeping the station reliable and ready for future quakes! #ShakeAlert #CalOES

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 23/07/2026

This week, members of the Seismo Lab joined the NASA Exploration Science Forum to share their research on lunar exploration. Seismo Lab Director Zhongwen Zhan presented work from Caltech and JPL, while Yuri Tamama shared her research on thermal moonquakes during the poster session. buff.ly/K6qaYBP

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 21/07/2026

Life aboard a research ship still involves plenty of work on theses and papers. Downtime brought movies, games, a mess-hall coffee shop, ocean-assisted table tennis, and shared sunrises and sunsets. Read more: buff.ly/VVbCAol

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 19/07/2026

Weekly Earthquake Stats: 14 Jul 2026 - 18 Jul 2026. There were 447 events this week ranging from M -0.63 to 4.32. Check out our weekly playback map and visit www.scsn.org for detailed information. #earthquakes #seismology #SCSN #weeklystats @CaltechSeismo

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 17/07/2026

The 5th year of Earthquake Fellows wraps up this week after another successful summer! Throughout the summer, Fellows conducted their own research projects related to ambient noise, seismic instrumentation, and even machine learning!

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 17/07/2026

#FieldPhotoFriday With the heat upon us, we’re looking back at cooler fieldwork near Big Bear! These snowy pics are from a 2005 station visit. The crew will return soon to replace a datalogger causing daily reboots, though there sadly probably won’t be snow this time. #ShakeAlert #CalOES

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 15/07/2026

On July 10, the EQ Fellows Program held their first Alumni Celebration, where students from different cohorts came to speak with the current Fellows but also celebrate program success from these last 5 years.

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 15/07/2026

Last week, we hosted a #BICEPP meeting at Caltech. Margaret Vinci and Jessie Saunders guided local leaders through earthquake preparedness, early warning, operational uses for alerts, and a tour of our facilities. A great turnout and opportunity to build connections!

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 13/07/2026

M4.1 18km WSW of #Johannesburg, CA, #SouthernCalifornia #Earthquake confirmed valid. Updated analysis coming soon @ www.scsn.org/index.php/earthquakes/latest-earthquake-information/

scsn.org

Latest Earthquake Information | SCSN

For data archive access visit SCEDC

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 12/07/2026

Weekly Earthquake Stats: 05 Jul 2026 - 11 Jul 2026. There were 400 events this week ranging from M -0.33 to 3.22. Check out our weekly playback map and visit www.scsn.org for detailed information. #earthquakes #seismology #SCSN #weeklystats @CaltechSeismo

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 10/07/2026

This #FieldPhotoFriday we're back at Quakes Stadium from the 4th of July! A group of Seismo Lab members took equipment out, where they helped set up fireworks, tested CSN rapid deployment units, and deployed a datalogger to collect data during the live fireworks show, from within the firing area!

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 07/07/2026

"Ha llegado el momento de desarrollar sistemas eficaces que utilicen automáticamente las alertas tempranas y activen mecanismos para proteger a las personas" Así es como Hiroo Kanamori, describe su respuesta a los recientes terremotos en Venezuela en esta entrevista. Lee el artículo:

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El mayor experto en terremotos de Japón: "Son como un choque en cadena en una autopista"

Hiroo Kanamori, una leyenda viva de la sismología, cree que debemos responder más rápido y de forma automática; quizá detrás venga un tsunami. Su nueva investigación revela que el último gran…

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 05/07/2026

Weekly Earthquake Stats: 28 Jun 2026 - 04 Jul 2026. There were 350 events this week ranging from M -0.34 to 3.39. Check out our weekly playback map and visit www.scsn.org for detailed information. #earthquakes #seismology #SCSN #weeklystats @CaltechSeismo

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 05/07/2026

Missed our July 4 livestream? Watch the trimmed version: buff.ly/VGwRXnk Seismo Lab teamed up with Pyro Spectaculars to place a seismometer and cameras inside the firing zone, capturing both the fireworks display and the seismic signals generated by the aerial bursts.

youtu.be

Fourth of July Fireworks with Seismic data at Quakes Stadium 2026

Celebrate Independence Day with a unique view of the science behind the spectacle. We were live at LoanMart Field, Quakes Stadium in Rancho Cucamonga, CA showing the fireworks display and the effect…

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 05/07/2026

We're live! Watch fireworks from inside the firing zone and see the seismic signals they generate in real time. Cameras and instruments at LoanMart Field are capturing both the show in the sky and the motion recorded on a seismometer. buff.ly/8Erdher #FourthOfJuly #Fireworks #SCSN #Caltech

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7/4/26 Fireworks at LoanMart Field Quakes Stadium

Celebrate Independence Day with a unique view of the science behind the spectacle.Watch live fireworks and the effect on a seismometer as shock waves from ae...

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Caltech Seismological Laboratory @caltechseismo.bsky.social · 05/07/2026

Make sure to catch our live stream tonight at about 9pm! We've been out here setting up fireworks at Quakes Stadium, and getting the CSN rapid deployment units tested!

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