ShakeAlert EEW System public safety information, news, and updates. ShakeAlert contributes to a Hazard Ready Nation (HRN). Posts & "likes" are not endorsements.

Joined August 2018
1,871 Photos and videos
ShakeAlert Earthquake Early Warning makes having a ball ⚽️ in earthquake country even safer! All fans🏟️ score when they are ShakeAlert Ready! ShakeAlert is available in California, Oregon, and Washington. Be a fan 📲: usgs.gov/FAQ/BeShakeAlertSaf… @ListosCA @Cal_OES @UOHazardsLab @OregonOEM @SantaClaraCity @SCCOEM @ReadyLACounty @ReadyLA @CityofSeattle @SantaClaraCity @FEMARegion9 @FEMARegion10 @PNSN1 @ReadyInglewood @LosAngelesFWC26 📷 If you are in a large venue, like a stadium, and feel shaking or get an alert, quickly DROP to the floor in front of your seat if you can, or lean over as much as possible. COVER your head and neck with your arms. HOLD ON until shaking stops. Follow guidance from local officials.
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USGS ShakeAlert retweeted
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Happy #FieldworkFriday! At station OLQN near Lake Quinault, the sun is shining and the forest is thriving. Field staff visited recently to make repairs and upgrade the power system at this station, which contributes to the @USGS_ShakeAlert Earthquake Early Warning system.
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USGS ShakeAlert retweeted
#FieldPhotoFriday Many of our stations, like this one near Westmorland, are spaced throughout the state's deserts and serve a vital role collecting data in our more swarm prone regions! This station contributed heavily to the recent Brawley swarm which produced hundreds of events including multiple M4 quakes! #ShakeAlert #CalOES
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Good morning Redwood Coast, California. The ShakeAlert Earthquake Early Warning system was activated for a magnitude 4.8 earthquake about 40 miles west of Petrolia at 5:45 am. Learn more about this earthquake: earthquake.usgs.gov/earthqua… @OregonOEM @Cal_OES @USGS_Quakes @UOHazardsLab @CAGeoSurvey @humboldtcalpoly @FEMARegion9 @FEMARegion10 📷ShakeMap earthquake information from this earthquake.
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Since the ShakeAlert system estimated this quake at magnitude 4.5 or greater alerts were delivered to cell phones or other devices by our Alert Delivery Partners in California through cell phone operating systems and mobile apps. Did you receive an alert? Please share a screenshot if you like. Thanks! 📷Table showing the levels at which ShakeAlert-powered alerts are delivered.
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We hope everyone is safe! Did you know that anyone in CA, OR, & WA can have the power of ShakeAlert Earthquake Early Warning in the palm of their hand? Remember to Drop, Cover, and Hold On if you feel shaking or get an alert. Learn more how to be ShakeAlert Ready here: usgs.gov/FAQ/BeShakeAlertSaf… 📷Graphic showing ways that anyone can be ShakeAlert Ready by setting up their phone to receive earthquake early warning alerts.
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Update: the magnitude for this earthquake has been updated to magnitude 5.1.
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Good morning Redwood Coast, California and Southern Oregon. The ShakeAlert Earthquake Early Warning system was activated for a magnitude 5.7 earthquake about 100 miles southwest of Pistol River, Oregon at 3:53 am. Learn more about this earthquake: earthquake.usgs.gov/earthqua… @OregonOEM @Cal_OES @UOHazardsLab @CAGeoSurvey @humboldtcalpoly @FEMARegion9 @FEMARegion9 @FEMARegion10 📷ShakeMap earthquake information from this earthquake.
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We know that feeling the ground shake can be unsettling. The USGS earthquakes team is here with you 24/7 🏪 getting information out so you can stay safe. We’re in this together 🤝. Be safe everyone! Learn how to Be ShakeAlert Ready: usgs.gov/FAQ/BeShakeAlertSaf… 📷Image with recommended protective actions from the USGS and all ShakeAlert partners in California, Oregon, and Washington.
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"About a year after Natalia Ruppert arrived in Fairbanks she was playing volleyball when the gymnasium around her began to shake. Everyone else knew what was going on—Alaska is the most seismologically active state in the country, after all—but it was new to the young PhD candidate. She’d left the dismantling Soviet Union to study earth science, so 'it was actually kind of exciting,' she remembers. 'My first earthquake'." Meet Dr. Natalia Ruppert, coordinator for the USGS-led ShakeAlert Earthquake Early Warning System. She and her team help keep over 50 million people in Washington, Oregon, and California safer from earthquakes. Link to the full article by Allison Williams: seattlemet.com/news-and-city… @CaltechSeismo @BerkeleySeismo @UOHazardsLab @Cal_OES @CAGeoSurvey @OregonOEM @UW @PNSN1 @uafairbanks @FEMARegion9 @FEMARegion10 @waDNR @USGS @USGS_Quakes @OEMSeattle @SeismoSocietyAm @waShakeOut 📸 Dr. Natalia Ruppert on the Atmospheric Sciences and Geophysics Building at UW. Image courtesy of Grant Hindsley, SeattleMet
The head of a national seismology program thinks she can catch the big one right as it starts. na2.hubs.ly/H05QnMB0
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USGS ShakeAlert retweeted
#FieldPhotoFriday Station maintenance is rarely just one task. During a recent visit to this site, our crew cleared weeds, replaced a sensor, and identified an additional problem to address on a future trip. Keeping the network healthy and crucially @USGS_ShakeAlert ready takes constant work to ensure it's reliable for future quakes!
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Emergency managers rely on fast, reliable information during earthquakes. The USGS is helping them train with the tools used during real events. At the 2026 California Emergency Services Association (CESA) Conference in San Diego, the USGS ShakeAlert Team previewed the new Earthquake Information Tools for Public Safety training module for emergency managers and preparedness professionals. The training focuses on earthquake information tools that support decision-making before, during, and after earthquakes, including: 📲 ShakeAlert® Earthquake Early Warning — Detects earthquakes rapidly and sends alerts to people and automated systems, often before strong shaking begins. 🗺️ ShakeMap® — Provides maps showing ground motion and shaking intensity to help assess impacts after significant earthquakes. 📈 Aftershock Forecast — Estimates the likelihood and expected number of aftershocks following a significant earthquake. Planned for release in early 2027, the module will include training resources and an immersive scenario designed to strengthen understanding and operational use of these tools. Download a copy of the Earthquake Information Tools fact sheet here: ow.ly/i4O950Z2UXX @USGS_Quakes @Cal_OES @CAGeoSurvey @FEMARegion9 @FEMARegion10 @waDNR @UOHazardsLab @OregonOEM @CaltechSeismo @BerkeleySeismo @EMCESA @NationalCERT1 @PNSN1 📸1: ShakeAlert team members engage CESA attendees about the Earthquake Information Tools Project and the ShakeAlert Ready Community Emergency Response Team Project. 📸 2: Project leader shares the timeline of when different earthquake information tools are available.
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USGS ShakeAlert retweeted
#FieldPhotoFriday from Hungry Valley, CA! After some serious digging at this site, our team swapped out worn batteries and updated the equipment to keep this station running smoothly. As part of the #ShakeAlert EEW System, it helps keep 50 million people on the West Coast safe!
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Learn more about the temporary increase in earthquake activity near Brawley, CA - known as a seismic swarm. The USGS assesses that the earthquake caused no-to-light damage from shaking. Approximately 180 thousand people experienced Light (MMI IV) to Strong (MMI VI) shaking. The ShakeAlert Earthquake Early Warning System was activated several times resulting in alert deliveries to cell phones. 👉If you feel shaking or get an alert: Drop, Cover, and Hold On. Stay safe everyone. Learn more about the Brawley swarm here: earthquake.usgs.gov/earthqua… @USGS_Quakes @Cal_OES @CaltechSeismo @CAGeoSurvey @FEMARegion9 @CAStateParks @ImperialCntyCA @UOHazardsLab @USGS @SanDiegoCounty 📸Screenshot of the Brawley seismic swarm with currently 344 events in the sequence (as of 8:45 am Pacific Time on 5/10). The southern end of the Salton Sea is shown upper left.
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Good morning Southern CA. The ShakeAlert Earthquake Early Warning system was activated for a magnitude 4.2 earthquake about 2 miles northwest of Brawley at 12:10 am. Learn more about this earthquake: earthquake.usgs.gov/earthqua… @USGS_Quakes @Cal_OES @CAGeoSurvey @ImperialCntyCA @FEMARegion9 @SanDiegoCounty 📷Image showing USGS ShakeMap for this earthquake.
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Update: The magnitude for this event has been revised to M4.7.
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