Caltech Seismological Laboratory
@caltechseismo.bsky.social
Caltech Seismological Laboratory | A focal point and source for earthquake science, discovery, and research in Southern California for over 100 years!
#FieldPhotoFriday from our station near Hector Mine! Installed in 1997, two years before the 1999 Hector Mine earthquake. It recently got a new battery. Getting up the steep, sketchy road was no small feat, but the crew made it just in time before this week’s rain rolled in!
November 14, 2025 at 6:03 PM
#FieldPhotoFriday from our station near Hector Mine! Installed in 1997, two years before the 1999 Hector Mine earthquake. It recently got a new battery. Getting up the steep, sketchy road was no small feat, but the crew made it just in time before this week’s rain rolled in!
Welcome to the Seismo Lab, Dr. Brent Minchew!
A Caltech alum, U.S. veteran, and now professor of geophysics, Dr. Minchew has expertise in ice dynamics, remote sensing, and Earth system processes.
We’re honored to have him back and thank him for his service, and scientific discovery!
buff.ly/YuNviGM
A Caltech alum, U.S. veteran, and now professor of geophysics, Dr. Minchew has expertise in ice dynamics, remote sensing, and Earth system processes.
We’re honored to have him back and thank him for his service, and scientific discovery!
buff.ly/YuNviGM
Brent Minchew - Environmental Science and Engineering
I study how glaciers and ice sheets respond to climate change. I am most interested in understanding the mechanisms that will govern rates of sea-level rise in the coming decades and centuries. I am…
ese.caltech.edu
November 12, 2025 at 7:00 PM
Welcome to the Seismo Lab, Dr. Brent Minchew!
A Caltech alum, U.S. veteran, and now professor of geophysics, Dr. Minchew has expertise in ice dynamics, remote sensing, and Earth system processes.
We’re honored to have him back and thank him for his service, and scientific discovery!
buff.ly/YuNviGM
A Caltech alum, U.S. veteran, and now professor of geophysics, Dr. Minchew has expertise in ice dynamics, remote sensing, and Earth system processes.
We’re honored to have him back and thank him for his service, and scientific discovery!
buff.ly/YuNviGM
Weekly Earthquake Stats: 02 Nov 2025 - 08 Nov 2025. There were 215 events this week ranging from M 0.18 to 3.33. Check out our weekly playback map and visit www.scsn.org for detailed information. #earthquakes #seismology #SCSN #weeklystats @CaltechSeismo
November 9, 2025 at 10:00 PM
Weekly Earthquake Stats: 02 Nov 2025 - 08 Nov 2025. There were 215 events this week ranging from M 0.18 to 3.33. Check out our weekly playback map and visit www.scsn.org for detailed information. #earthquakes #seismology #SCSN #weeklystats @CaltechSeismo
This week’s #FieldPhotoFriday is near Big Pine. One of the oldest seismic stations in the SCSN, Installed in 1932 and operated from a building more than 100 years old, it recently received new equipment to keep high-quality data flowing. A historic site still hard at work for seismic safety today!
November 7, 2025 at 6:03 PM
This week’s #FieldPhotoFriday is near Big Pine. One of the oldest seismic stations in the SCSN, Installed in 1932 and operated from a building more than 100 years old, it recently received new equipment to keep high-quality data flowing. A historic site still hard at work for seismic safety today!
Last week, Dr. Husker (SCSN Manager and Caltech Seismo Lab Prof.) was invited to present on the SCSN at the Mexican Geophysical Union (UGM) annual meeting in Puerto Vallarta. He also experienced Día de los Muertos celebrations, taking in the culture, traditions, and beauty of this day of remembrance
November 4, 2025 at 10:00 PM
Last week, Dr. Husker (SCSN Manager and Caltech Seismo Lab Prof.) was invited to present on the SCSN at the Mexican Geophysical Union (UGM) annual meeting in Puerto Vallarta. He also experienced Día de los Muertos celebrations, taking in the culture, traditions, and beauty of this day of remembrance
Weekly Earthquake Stats: 26 Oct 2025 - 01 Nov 2025. There were 250 events this week ranging from M -0.20 to 3.85. Check out our weekly playback map and visit www.scsn.org for detailed information. #earthquakes #seismology #SCSN #weeklystats @CaltechSeismo
November 2, 2025 at 9:52 PM
Weekly Earthquake Stats: 26 Oct 2025 - 01 Nov 2025. There were 250 events this week ranging from M -0.20 to 3.85. Check out our weekly playback map and visit www.scsn.org for detailed information. #earthquakes #seismology #SCSN #weeklystats @CaltechSeismo
#EQ History: 10/16/99 M7.1 Hector Mine. The EQ was in such a remote area there was no nearby town that could be used as its name. It was named after an open pit quarry 14 miles NW of epicenter. Its foreshocks were in the same location as a cluster of 1992 Landers EQ aftershocks.
October 31, 2025 at 10:45 PM
#EQ History: 10/16/99 M7.1 Hector Mine. The EQ was in such a remote area there was no nearby town that could be used as its name. It was named after an open pit quarry 14 miles NW of epicenter. Its foreshocks were in the same location as a cluster of 1992 Landers EQ aftershocks.
Happy Halloween from the Seismo Lab family! Wishing everyone a fun and safe night of costumes, candy, and community. Let’s hope no tricks or tremors are summoned this Hallows Eve. Stay prepared and enjoy the night!
October 31, 2025 at 9:30 PM
Happy Halloween from the Seismo Lab family! Wishing everyone a fun and safe night of costumes, candy, and community. Let’s hope no tricks or tremors are summoned this Hallows Eve. Stay prepared and enjoy the night!
Gloomy weather gave the perfect Halloween vibe for last week’s field work! Several elements of this seismic station near Mammoth were upgraded, despite encountering a large snake inside the vault! Who needs haunted houses when the earth is full of spooky surprises? #FieldWorkFrights #HappyHalloween
October 31, 2025 at 6:30 PM
Gloomy weather gave the perfect Halloween vibe for last week’s field work! Several elements of this seismic station near Mammoth were upgraded, despite encountering a large snake inside the vault! Who needs haunted houses when the earth is full of spooky surprises? #FieldWorkFrights #HappyHalloween
Our Halloween Morning Social (Mon, Oct 27) brought the Seismo Lab together for some stamp-rally fun, photobooth smiles, tasty treats, and new connections! Huge thanks again to everyone who joined and helped make it happen. Some photo highlights below. #SeismoLab #Halloween
October 29, 2025 at 9:00 PM
Our Halloween Morning Social (Mon, Oct 27) brought the Seismo Lab together for some stamp-rally fun, photobooth smiles, tasty treats, and new connections! Huge thanks again to everyone who joined and helped make it happen. Some photo highlights below. #SeismoLab #Halloween
What a fantastic turnout for the Seismo Lab’s first-ever Halloween Morning Social! 🎃
From the stamp rally and trick-or-treating stops to the photobooth, snacks, and great company! It was all treats and no tricks. Thanks to everyone who joined in the fun, and Happy Halloween from the Seismo Lab team!
From the stamp rally and trick-or-treating stops to the photobooth, snacks, and great company! It was all treats and no tricks. Thanks to everyone who joined in the fun, and Happy Halloween from the Seismo Lab team!
October 27, 2025 at 8:30 PM
What a fantastic turnout for the Seismo Lab’s first-ever Halloween Morning Social! 🎃
From the stamp rally and trick-or-treating stops to the photobooth, snacks, and great company! It was all treats and no tricks. Thanks to everyone who joined in the fun, and Happy Halloween from the Seismo Lab team!
From the stamp rally and trick-or-treating stops to the photobooth, snacks, and great company! It was all treats and no tricks. Thanks to everyone who joined in the fun, and Happy Halloween from the Seismo Lab team!
Weekly Earthquake Stats: 19 Oct 2025 - 25 Oct 2025. There were 229 events this week ranging from M 0.10 to 3.24. Check out our weekly playback map and visit www.scsn.org for detailed information. #earthquakes #seismology #SCSN #weeklystats @CaltechSeismo
October 26, 2025 at 8:55 PM
Weekly Earthquake Stats: 19 Oct 2025 - 25 Oct 2025. There were 229 events this week ranging from M 0.10 to 3.24. Check out our weekly playback map and visit www.scsn.org for detailed information. #earthquakes #seismology #SCSN #weeklystats @CaltechSeismo
We're well into spooky season and this #FieldPhotoFriday’s station fits right in!
Out near a long-abandoned desert mine, our crew worked alongside crumbling ruins, scattered debris and some history to replace a solar panel torn off by fierce winds. A quick repair brings this lonely site back online!
Out near a long-abandoned desert mine, our crew worked alongside crumbling ruins, scattered debris and some history to replace a solar panel torn off by fierce winds. A quick repair brings this lonely site back online!
October 24, 2025 at 5:02 PM
We're well into spooky season and this #FieldPhotoFriday’s station fits right in!
Out near a long-abandoned desert mine, our crew worked alongside crumbling ruins, scattered debris and some history to replace a solar panel torn off by fierce winds. A quick repair brings this lonely site back online!
Out near a long-abandoned desert mine, our crew worked alongside crumbling ruins, scattered debris and some history to replace a solar panel torn off by fierce winds. A quick repair brings this lonely site back online!
Meet Mo Hu, a Seismo Lab Grad Student who specializes in integrating geodynamic modeling with mineral physics to better understand seismic observations of the deep Earth! #SeismoLabSpotlight
October 22, 2025 at 9:00 PM
Meet Mo Hu, a Seismo Lab Grad Student who specializes in integrating geodynamic modeling with mineral physics to better understand seismic observations of the deep Earth! #SeismoLabSpotlight
The SCSN now uses machine learning as part of daily operations! Tools like PhaseNet and GaMMA boost pick & event accuracy, improving how we detect & locate earthquakes in SoCal.
Read more in our new @Nature Scientific Reports article:
buff.ly/ZC2CJON
#Seismology #MachineLearning #SCSN
Read more in our new @Nature Scientific Reports article:
buff.ly/ZC2CJON
#Seismology #MachineLearning #SCSN
Improvements from incorporating machine learning algorithms into near real-time operational post-processing - Scientific Reports
Scientific Reports - Improvements from incorporating machine learning algorithms into near real-time operational post-processing
buff.ly
October 21, 2025 at 10:00 PM
The SCSN now uses machine learning as part of daily operations! Tools like PhaseNet and GaMMA boost pick & event accuracy, improving how we detect & locate earthquakes in SoCal.
Read more in our new @Nature Scientific Reports article:
buff.ly/ZC2CJON
#Seismology #MachineLearning #SCSN
Read more in our new @Nature Scientific Reports article:
buff.ly/ZC2CJON
#Seismology #MachineLearning #SCSN
Happy #FieldPhotoFriday! Our field crew has been working hard to update multiple pieces of equipment at this station near Ventucopa, and a new datalogger finally got everything up and running. This maintenance keeps our network up to date and ready for shaking, so we can all be better prepared!
October 17, 2025 at 5:03 PM
Happy #FieldPhotoFriday! Our field crew has been working hard to update multiple pieces of equipment at this station near Ventucopa, and a new datalogger finally got everything up and running. This maintenance keeps our network up to date and ready for shaking, so we can all be better prepared!
What a #ShakeOut day! After a morning of drills and outreach, Allen (SCSN Manager), Jessie (EEW Scientist), and Zack (Seismic Analyst) joined partners at the City of LA EOC, making new connections and strengthening others across CA. Huge thanks to Margaret Vinci & team for such an impactful event!
October 16, 2025 at 9:00 PM
What a #ShakeOut day! After a morning of drills and outreach, Allen (SCSN Manager), Jessie (EEW Scientist), and Zack (Seismic Analyst) joined partners at the City of LA EOC, making new connections and strengthening others across CA. Huge thanks to Margaret Vinci & team for such an impactful event!
A successful #ShakeOut press conference today at the City of LA EOC! Agencies, scientists & leaders, from the Governor’s & Mayor’s offices to LAFD, SCEC, Red Cross, USGS, Caltech & many more came together to promote safety, preparedness & collaboration for a more resilient California.
October 16, 2025 at 8:32 PM
A successful #ShakeOut press conference today at the City of LA EOC! Agencies, scientists & leaders, from the Governor’s & Mayor’s offices to LAFD, SCEC, Red Cross, USGS, Caltech & many more came together to promote safety, preparedness & collaboration for a more resilient California.
Mark your calendar! Tomorrow, Thursday at 10:16 a.m., wherever you are — drop, cover, and hold on.
Share your #ShakeOut drills, photos, or tips. Tag us and use #GreatCAShakeOut so we can amplify preparedness across the community.
Share your #ShakeOut drills, photos, or tips. Tag us and use #GreatCAShakeOut so we can amplify preparedness across the community.
October 15, 2025 at 7:01 PM
Mark your calendar! Tomorrow, Thursday at 10:16 a.m., wherever you are — drop, cover, and hold on.
Share your #ShakeOut drills, photos, or tips. Tag us and use #GreatCAShakeOut so we can amplify preparedness across the community.
Share your #ShakeOut drills, photos, or tips. Tag us and use #GreatCAShakeOut so we can amplify preparedness across the community.
Here are some proactive steps you and your family can take:
📲 Download and enable apps/alerts like MyShake and Wireless Emergency Alerts, more info here: buff.ly/64Fd7sz
🎒 Create or update your go-bag / emergency supply kit
🗄️ Secure heavy or tall furniture, shelves, and objects that could fall
📲 Download and enable apps/alerts like MyShake and Wireless Emergency Alerts, more info here: buff.ly/64Fd7sz
🎒 Create or update your go-bag / emergency supply kit
🗄️ Secure heavy or tall furniture, shelves, and objects that could fall
Home Page - Cal MyHazards
California Governor's Office of Emergency Services ....
myhazards.caloes.ca.gov
October 15, 2025 at 5:02 PM
Here are some proactive steps you and your family can take:
📲 Download and enable apps/alerts like MyShake and Wireless Emergency Alerts, more info here: buff.ly/64Fd7sz
🎒 Create or update your go-bag / emergency supply kit
🗄️ Secure heavy or tall furniture, shelves, and objects that could fall
📲 Download and enable apps/alerts like MyShake and Wireless Emergency Alerts, more info here: buff.ly/64Fd7sz
🎒 Create or update your go-bag / emergency supply kit
🗄️ Secure heavy or tall furniture, shelves, and objects that could fall
At the Caltech Seismo Lab and SCSN, we’re proud to support the state’s earthquake preparedness efforts and encourage you to participate in this year’s ShakeOut event!
When: Thursday, October 16 at 10:16 a.m. PST
What: Practice “Drop, Cover, and Hold On” life-saving moves you can do wherever you are!
When: Thursday, October 16 at 10:16 a.m. PST
What: Practice “Drop, Cover, and Hold On” life-saving moves you can do wherever you are!
California Earthquake Early Warning | California Earthquake Early Warning Information
Official website of the State of California
earthquake.ca.gov
October 14, 2025 at 9:00 PM
At the Caltech Seismo Lab and SCSN, we’re proud to support the state’s earthquake preparedness efforts and encourage you to participate in this year’s ShakeOut event!
When: Thursday, October 16 at 10:16 a.m. PST
What: Practice “Drop, Cover, and Hold On” life-saving moves you can do wherever you are!
When: Thursday, October 16 at 10:16 a.m. PST
What: Practice “Drop, Cover, and Hold On” life-saving moves you can do wherever you are!
Weekly Earthquake Stats: 05 Oct 2025 - 11 Oct 2025. There were 328 events this week ranging from M -0.34 to 3.47. Check out our weekly playback map and visit www.scsn.org for detailed information. #earthquakes #seismology #SCSN #weeklystats @CaltechSeismo
October 12, 2025 at 8:48 PM
Weekly Earthquake Stats: 05 Oct 2025 - 11 Oct 2025. There were 328 events this week ranging from M -0.34 to 3.47. Check out our weekly playback map and visit www.scsn.org for detailed information. #earthquakes #seismology #SCSN #weeklystats @CaltechSeismo
#FieldPhotoFriday With the weather cooling a bit, lets show at a site that is normally pretty hot, looking lush through years of field visits! This station near Murrieta is in a nursery so it's always got a good view of the city and greenery! I'm sure the crew likes the change.
October 10, 2025 at 5:02 PM
#FieldPhotoFriday With the weather cooling a bit, lets show at a site that is normally pretty hot, looking lush through years of field visits! This station near Murrieta is in a nursery so it's always got a good view of the city and greenery! I'm sure the crew likes the change.
Weekly Earthquake Stats: 28 Sep 2025 - 04 Oct 2025. There were 206 events this week ranging from M 0.17 to 3.18. Check out our weekly playback map and visit www.scsn.org for detailed information. #earthquakes #seismology #SCSN #weeklystats @CaltechSeismo
October 5, 2025 at 8:46 PM
Weekly Earthquake Stats: 28 Sep 2025 - 04 Oct 2025. There were 206 events this week ranging from M 0.17 to 3.18. Check out our weekly playback map and visit www.scsn.org for detailed information. #earthquakes #seismology #SCSN #weeklystats @CaltechSeismo
Congratulations to longtime USGS field tech Scott Lydeen on his retirement! Scott spent decades maintaining & upgrading SCSN stations across SoCal, always innovating and working hand-in-hand with Caltech staff. His legacy lives on, not least at the seismic site named after him. Thank you, Scott!
September 30, 2025 at 9:00 PM
Congratulations to longtime USGS field tech Scott Lydeen on his retirement! Scott spent decades maintaining & upgrading SCSN stations across SoCal, always innovating and working hand-in-hand with Caltech staff. His legacy lives on, not least at the seismic site named after him. Thank you, Scott!