Early Warning Labs

⚠️ To receive an early warning, the quake MUST be over M4.5 AND your forecasted Intensity is over MMI 3 - If the quake is smaller or your MMI is under 3 you might STILL FEEL LIGHT SHAKING but not be issued an alert under USGS rules usgs.gov/faqs/what-diff…

NASA is out with a dire warning about San Francisco. The city is sinking at a rate so fast, it could put human life at risk. Story here: abc7news.com/18730957/

HNL Alert: 06:55 PM 03-13-2026 - Dam failure possible at WAHIAWA DAM. Failure of the dam could result in catastrophic flooding. Evacuation Warning for AREAS DOWNSTREAM of WAHIAWA DAM including PARTS OF HALEIWA AND WAIALUA. Map: manager.everbridge.net/pub/2415044541…

Notable quake, preliminary info: M 6.3 - 91 km SW of Nikolski, Alaska ow.ly/MC0f106uVsC

Tue Feb 17 18:55:29 UTC 2026 When an earthquake hits SoCal, SCSN acts fast. We post preliminary info for all local M2.75+ events, often within minutes. Reviewed updates are available at SCEDC.caltech.edu and USGS.gov. @CaltechQuake • @CaltechSeismo

Out now: BSL Director, Prof. Richard Allen, talks about the importance of research to public earthquake safety & explains how the Lab pushes research findings into action via @MyShakeApp and @USGS_ShakeAlert in partnership w/ @Cal_OES. View our story now: buff.ly/pmBe63b

Nevada is one step closer to having @USGS_ShakeAlert earthquake early warning

@NVSeismoLab @USGS_ShakeAlert How can we help?

Good morning Northern California! Did you feel the magnitude 4.3 earthquake about 2.5 miles southeast of San Ramon at 7:01 am PT. The #ShakeAlert system was activated. See: earthquake.usgs.gov/earthquakes/ev… @Cal_OES @CalConservation

Take this storm seriously, folks. Moderate to major impacts are expected from the Central US through to the Northeast today through the weekend. - Hazardous to impossible driving conditions are expected. Avoid travel if at all possible. - Widespread closures and disruption to infrastructure may also occur. Stay weather aware and up to date on the latest alerts and weather conditions by following your local national weather service office on social media or checking weather.gov.

Good evening Southern California, did you feel the magnitude 4.6 earthquake about 12 miles northeast of Indio at 5:56 pm? The #ShakeAlert system was activated. See: earthquake.usgs.gov/earthquakes/ev… @CAGeoSurvey @Cal_OES @USGS_Quakes

Cheers to keeping people safe in 2026!

Good evening Northern California! Did you feel the magnitude 5.3 quake about 9 miles northwest of Susanville at 9:49 pm? The #ShakeAlert system was activated. See: earthquake.usgs.gov/earthquakes/ev… @Cal_OES @CAGeoSurvey @USGS_Quakes

Good afternoon Northern California! Did you feel the magnitude 5.0 quake about 9 miles northwest of Susanville at 4:41 pm? The #ShakeAlert system was activated. See: earthquake.usgs.gov/earthquakes/ev… @USGS_Quakes @Cal_OES @CAGeoSurvey

Notable quake, preliminary info: M 3.9 - 5 km SE of San Ramon, CA ow.ly/3jPk106s68M

Good afternoon Northern California! Did you feel the magnitude 4.2 quake 4 miles west of Glen Ellen at 3:30 pm? The #ShakeAlert system was activated. See: earthquake.usgs.gov/earthquakes/ev… @Cal_OES @CAGeoSurvey @USGS_Quakes

Earthquake swarms keep rattling the Bay Area. What's going on? latimes.com/california/sto…

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Fact Check: There is no “tremor” occurring at Mt. Rainier. Always check credible sources like USGS and PNSN for information about volcanoes. The station STAR is temporarily impacted by ice buildup causing communication problems resulting in an odd, but non-volcanic signal.

Notable quake, preliminary info: M 3.5 - 4 km SSW of Vallejo, CA ow.ly/z5Vi106qjhL