USGS ShakeAlert

Teachers, Administrators, Parents: Help Your School Community Prepare for Earthquakes 🏫 The ShakeAlert Ready Schools initiative offers free earthquake preparedness resources for K–12 school communities. Developed by the USGS and state partners in California, Oregon, and Washington, the initiative includes standards-based lessons, teaching tools, and other resources. ShakeAlert®, the nation's public earthquake early warning system, can provide seconds of warning before strong shaking arrives, giving people time to take protective action, such as Drop, Cover, and Hold On. Earthquake preparedness takes planning and practice. Explore ShakeAlert Ready Schools resources to help your school community build awareness, strengthen preparedness, and know what to do when an earthquake occurs. Schools can put those skills into action by participating in the 2026 Great ShakeOut on October 15 and practicing Drop, Cover, and Hold On. Learn more 👉 ShakeAlert.org/Schools 📸: USGS seismologist showing students an earthquake animation. @Cal_OES @ReadyLACounty @CAGeoSurvey @Cal_OES @OregonOEM @waDNR @UOHazardsLab @PNSN1 @BerkeleySeismo @CaltechSeismo @FEMARegion9 @FEMARegion10 @CAseismic @cascience @NSTA @WstaSci @CADeptEd @LASchools @ORDeptEd @WA_SBE @waShakeOut

#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

It's 🛠️ #FieldWorkFriday Technicians upgraded the 20-year-old infrastructure at seismic site LAIR in western Oregon, helping it transmit data faster to support the @USGS_ShakeAlert Earthquake Early Warning System.

Attending the 13th National Conference on Earthquake Engineering in Portland? Join ShakeAlert Team members for today's session: 👉Speed Dating with Earthquake Early Warning: Revealing Conversations About What Makes Mitigation in the Moment Possible: 2:30 - 4:00 pm (PT) in Room E146, Oregon Convention Center Participants will explore a shared understanding of: • Earthquake Early Warning as a sociotechnical system • Adoption barriers for specific settings, sectors, and uses • Create opportunities for cross-disciplinary thinking, collaboration, and personal action @EERI_tweets #13NCEE @PNSN1 @UOHazardsLab @BerkeleySeismo @waShakeOut @PNSN1 @SkyAlertUSA @FEMARegion10 @FEMARegion9 📸 Images: ShakeAlert impacts technology and how over 50 million people interact with earthquakes.

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/BeShakeAle… 📷There are at least three ways that everyone can get ShakeAlert EEW alerts on their phone.

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! 📷Animation of how the ShakeAlert System works from earthquake detection by the USGS to alert delivery by ShakeAlert partners.

Good morning Southern California! Did you feel the magnitude 4.1 earthquake about 11 miles southwest of Johannesburg at 9:40 am? The ShakeAlert Earthquake Early Warning System was Activated. Learn more about this earthquake: earthquake.usgs.gov/earthquakes/ev… @Cal_OES @ReadyLACounty @CAGeoSurvey @ListosCA @CountyofKern @USGS_Quakes @CaltechSeismo 📷ShakeMap from this earthquake.

Anyone can Be ShakeAlert Ready! Add it to your quake safety toolbox 🧰 today. Stay safe everyone! usgs.gov/programs/earth… 📷Image with reminders about how anyone can be ShakeAlert Ready.

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.

Good morning Southern California! Did you feel the magnitude 4.2 earthquake about 1 mile southeast of Frazier Park at 3:38 am? The ShakeAlert Earthquake Early Warning System was Activated. Learn more about this earthquake: earthquake.usgs.gov/earthquakes/ev… @Cal_OES @ReadyLACounty @CAGeoSurvey @ListosCA @CountyofKern @USGS_Quakes @CaltechSeismo 📷ShakeMap from this earthquake.

If you are having trouble with the link to Be ShakeAlert Safe in the previous post please try this: usgs.gov/programs/earth… Thank you

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/BeShakeAle… 📷Graphic showing ways that anyone can be ShakeAlert Ready by setting up their phone to receive earthquake early warning alerts.

Good evening Northern California! Did you feel the magnitude 4.2 earthquake about 6 miles North of Covelo at 6:14 pm. The ShakeAlert Earthquake Early Warning System was Activated. Learn more about this earthquake: earthquake.usgs.gov/earthquakes/ev… @Cal_OES @VisitMendocino @CAGeoSurvey @ListosCA @MendoSheriff @USGS_Quakes 📷ShakeMap from this earthquake.

There are many ways to celebrate 🎉 today 🇺🇸! Join ShakeAlert in celebrating the many ways anyone can get earthquake early warning! 🎆 Did you know there is at least 3 ways to get ShakeAlert EEW alerts📲 in California, Oregon, and Washington? ShakeAlert *is* the USA’s EEW system available to all. Happy 4th! 🇺🇸 Celebrate here 🎇: usgs.gov/FAQ/BeShakeAle… @Cal_OES @OregonOEM @UOHazardsLab @PNSN1 @FEMARegion9 @FEMARegion10 @USGS @waShakeOut @ShakeOut @ReadyLACounty @ReadyLA @CaltechSeismo @USGS_Quakes 📷 Ways to get ShakeAlert earthquake early warning alerts on your cell phone.

#FieldPhotoFriday This week, our field team played detective on a station whose radio connection had gone dark. After a dusty drive to our Palmdale site and a quick reconfiguration, it was back online and ready to help power earthquake early warning! #ShakeAlert #CalOES

While we're waiting for the second half, here's what to do if you get a @USGS_ShakeAlert earthquake early warning message or feel strong shaking while you're attending a World Cup match in a stadium in earthquake country! Drop, Cover, and Hold On.

#FieldPhotoFriday This station in the mountains near Wheeler Springs recently received a maintenance visit after connection issues were traced to failing cellular connectivity, not its power system. Thanks to a quick fix by our hardworking field crew, it's back online and helping keep Southern California's earthquake monitoring and early warning network resilient. #ShakeAlert #CalOES