When an earthquake hits SoCal, SCSN acts fast. We automatically post preliminary info for all local M2.75+ events, often within minutes. Reviewed updates are available at SCEDC.caltech.edu, www.SCSN.org, and USGS.gov. @caltechquake.bsky.social • @caltechseismo.bsky.social

#AutoEQ A magnitude 3.4 (MI) #earthquake has occurred 3 mi SW of Delta, B.C., MX at 02:16 PST Nov 17, 2025 [2025-11-17 10:16 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci40486058#executive

#AutoEQ A magnitude 2.9 (MI) #earthquake has occurred 14 mi NNW of Borrego Springs, CA at 16:10 PST Nov 16, 2025 [2025-11-17 00:10 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci40485794#executive

Weekly Earthquake Stats: 09 Nov 2025 - 15 Nov 2025. There were 212 events this week ranging from M 0.12 to 2.94. Check out our weekly playback map and visit www.scsn.org for detailed information. #earthquakes #seismology #SCSN #weeklystats @CaltechSeismo

#AutoEQ A magnitude 3.0 (MI) #earthquake has occurred 10 mi W of Westmorland, CA at 16:37 PST Nov 10, 2025 [2025-11-11 00:37 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci40483594#executive

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

#AutoEQ A magnitude 2.8 (MI) #earthquake has occurred 12 mi W of Isla Vista, CA at 23:16 PST Nov 08, 2025 [2025-11-09 07:16 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci40482882#executive

When an earthquake hits SoCal, SCSN acts fast. We automatically post preliminary info for all local M2.75+ events, often within minutes. Reviewed updates are available at SCEDC.caltech.edu, www.SCSN.org, and USGS.gov. @caltechquake.bsky.social — @caltechseismo.bsky.social

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

#AutoEQ A magnitude 3.2 (MI) #earthquake has occurred 3 mi S of Santa Barbara Is., CA at 01:04 PDT Nov 02, 2025 [2025-11-02 08:04 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41324344#executive

#AutoEQ A magnitude 2.8 (MI) #earthquake has occurred 2 mi N of Big Bear City, CA at 12:31 PDT Nov 01, 2025 [2025-11-01 19:31 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41324008#executive

#AutoEQ A magnitude 2.8 (MI) #earthquake has occurred 2 mi N( of ar City, CA at 12:31 PDT Nov 01, 2025 [2025-11-01 19:31 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41116935#executive

#AutoEQ A magnitude 2.9 (MI) #earthquake has occurred 4 mi NNW of Delta, B.C., MX at 03:13 PDT Oct 30, 2025 [2025-10-30 10:13 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41322528#executive

#AutoEQ A magnitude 2.9 (MI) #earthquake has occurred 4 mi NNW of a, B.C., MX at 03:13 PDT Oct 30, 2025 [2025-10-30 10:13 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41115631#executive

#AutoEQ A magnitude 3.0 (MI) #earthquake has occurred 6 mi N of Borrego Springs, CA at 20:05 PDT Oct 29, 2025 [2025-10-30 03:05 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41322360#executive

#AutoEQ A magnitude 3.0 (MI) #earthquake has occurred 6 mi N( of o Springs, CA at 20:05 PDT Oct 29, 2025 [2025-10-30 03:05 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41115511#executive

#AutoEQ A magnitude 3.6 (MI) #earthquake has occurred 30 mi E of Maneadero, B.C., MX at 22:27 PDT Oct 28, 2025 [2025-10-29 05:27 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41321960#executive

#AutoEQ A magnitude 3.6 (MI) #earthquake has occurred 30 mi E( of ero, B.C., MX at 22:27 PDT Oct 28, 2025 [2025-10-29 05:27 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41115111#executive

#AutoEQ A magnitude 3.5 (MI) #earthquake has occurred 39 mi SSW of Progreso, B.C., MX at 20:29 PDT Oct 28, 2025 [2025-10-29 03:29 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41321872#executive

#AutoEQ A magnitude 3.6 (MI) #earthquake has occurred 44 mi SSW of reso, B.C., MX at 20:29 PDT Oct 28, 2025 [2025-10-29 03:29 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41115079#executive

#AutoEQ A magnitude 3.7 (MI) #earthquake has occurred 57 mi SSW of Alberto Oviedo Mota, B.C., MX at 01:28 PDT Oct 28, 2025 [2025-10-28 08:28 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41321472#executive

#AutoEQ A magnitude 2.9 (MI) #earthquake has occurred 7 mi WNW of Progreso, B.C., MX at 17:41 PDT Oct 26, 2025 [2025-10-27 00:41 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41320720#executive

#AutoEQ A magnitude 2.8 (MI) #earthquake has occurred 4 mi NNW of Santa Paula, CA at 16:28 PDT Oct 26, 2025 [2025-10-26 23:28 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41320696#executive

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

#AutoEQ A magnitude 2.9 (MI) #earthquake has occurred 9 mi W of Johannesburg, CA at 11:15 PDT Oct 26, 2025 [2025-10-26 18:15 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41320520#executive

#AutoEQ A magnitude 2.8 (MI) #earthquake has occurred 12 mi NNE of Kernville, CA at 16:09 PDT Oct 24, 2025 [2025-10-24 23:09 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41318432#executive

When an earthquake hits SoCal, SCSN acts fast. We automatically post preliminary info for all local M2.75+ events, often within minutes. Reviewed updates are available at SCEDC.caltech.edu, www.SCSN.org, and USGS.gov. @caltechquake.bsky.social | @caltechseismo.bsky.social

#AutoEQ A magnitude 3.3 (MI) #earthquake has occurred 6 mi NNE of Yucaipa, CA at 20:12 PDT Oct 23, 2025 [2025-10-24 03:12 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41113519#executive

#AutoEQ A magnitude 3.2 (MI) #earthquake has occurred 5 mi N of Westmorland, CA at 17:04 PDT Oct 22, 2025 [2025-10-23 00:04 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41113047#executive

#AutoEQ A magnitude 2.8 (MI) #earthquake has occurred 2 mi NW of Fontana, CA at 12:21 PDT Oct 22, 2025 [2025-10-22 19:21 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41112879#executive

#AutoEQ A magnitude 3.5 (MI) #earthquake has occurred 4 mi N of Santa Paula, CA at 03:21 PDT Oct 22, 2025 [2025-10-22 10:21 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41112631#executive

#AutoEQ A magnitude 2.8 (MI) #earthquake has occurred 3 mi W of Borrego Springs, CA at 13:15 PDT Oct 18, 2025 [2025-10-18 20:15 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41110951#executive

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!

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.

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

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!

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.

#AutoEQ A magnitude 2.9 (MI) #earthquake has occurred 9 mi E of Coso Junction, CA at 21:39 PDT Oct 09, 2025 [2025-10-10 04:39 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41106015#executive

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

#AutoEQ A magnitude 2.8 (MI) #earthquake has occurred 4 mi N of Big Bear City, CA at 06:20 PDT Oct 05, 2025 [2025-10-05 13:20 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41103031#executive

#AutoEQ A magnitude 3.7 (MI) #earthquake has occurred 4 mi N of Big Bear City, CA at 03:41 PDT Oct 05, 2025 [2025-10-05 10:41 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41102895#executive

#AutoEQ A magnitude 3.4 (MI) #earthquake has occurred 4 mi N of Big Bear City, CA at 02:51 PDT Oct 05, 2025 [2025-10-05 09:51 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41102847#executive

#AutoEQ A magnitude 3.5 (MI) #earthquake has occurred 4 mi N of Big Bear City, CA at 23:15 PDT Oct 04, 2025 [2025-10-05 06:15 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41102767#executive

#AutoEQ A magnitude 3.2 (MI) #earthquake has occurred 2 mi SE of Warner Springs, CA at 02:07 PDT Oct 03, 2025 [2025-10-03 09:07 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41102063#executive

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!

#AutoEQ A magnitude 2.9 (MI) #earthquake has occurred 9 mi W of Johannesburg, CA at 11:24 PDT Sep 29, 2025 [2025-09-29 18:24 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41100695#executive

Weekly Earthquake Stats: 21 Sep 2025 - 27 Sep 2025. There were 304 events this week ranging from M -0.27 to 3.28. Check out our weekly playback map and visit www.scsn.org for detailed information. #earthquakes #seismology #SCSN #weeklystats @CaltechSeismo

#AutoEQ A magnitude 3.2 (MI) #earthquake has occurred 49 mi SSW of Alberto Oviedo Mota, B.C., MX at 13:20 PDT Sep 25, 2025 [2025-09-25 20:20 UTC]. #SCSN has not yet confirmed this event. For more info visit http://earthquake.usgs.gov/earthquakes/eventpage/ci41097783#executive

When an earthquake hits SoCal, SCSN acts fast. We automatically post preliminary info for all local M2.75+ events, often within minutes. Reviewed updates are available at SCEDC.caltech.edu, www.SCSN.org, and USGS.gov. @caltechquake.bsky.social • @caltechseismo.bsky.social