Interested in learning more? Follow MyShake on Instagram, X, and TikTok for updates @myshakeapp

It warns app users from California to Washington. So far, it has alerted for 170 earthquakes and has been downloaded by more than 4 million users.

It uses the @ShakeAlert EEW system, which detects the earthquake and then estimates where and how strong the shaking will be. MyShake sends alerts to areas where strong shaking is expected.

MyShake delivers EEW (earthquake early warning) alerts, giving you a few seconds of warning before shaking starts. It’s supported by @Cal_OES and is the official EEW app for California.

Yes! Please follow the directions here: myshake.berkeley.edu/FAQ_en.html#... and copy/paste all debug text in an email to myshake-info@berkeley.edu

In that case, you definitely should have gotten an alert in addition to the notification- you can send us your debug info by following the directions here: myshake.berkeley.edu/FAQ_en.html#.... That might help us figure out what happened.

Hi ari, earthquake alerts are critical emergency alerts such that they go through do-not-disturb/silent settings. Alerts will have audio telling you to "Drop, Cover, and Hold On". If you felt the earthquake and didn't get an alert, you might have been outside the alerting region/MMI 3 contour

Hi Mike, alerts are critical and high priority such that they punch through silent mode and do-not-disturb. Your location (or last transmitted location) might have been outside of the alerting area which is the MMI 3 zone in the attached image. Contact us at myshake-info@berkeley.edu if not.

Hi Pinole Community Radio, if you are very close to the epicenter, the earthquake shaking will get to you before the alert does. The current earthquake location sets it by Oakland/Berkeley so if you were in Pinole at the time, it's likely some other reason- possibly cell service.

Hi there, send us an email at myshake-info@berkeley.edu. You'll get directions on sending us debug info- the debug info is the best way for us to determine what might have happened.

Yes! While magnitude and location are being determined, the earthquake is still happening. This only takes a few seconds, but the farther you are, the more time you have before the stronger shaking arrives and the more warning you will have as well.

Sorry about that! The closer you are to the epicenter, the more difficult it is to send an alert before strong shaking reaches you. Hopefully, you remembered to Drop, Cover, and Hold on!

Hi Greg, it could be your map filter settings. Try going to filters and adjusting the magnitude/time scale. If you aren't seeing any earthquakes at all on the map even for low magnitudes, send us a message at myshake-info@berkeley.edu and we'll get back to you.

We're sorry to hear that. The information on our app updates as information from the USGS comes in so sometimes there can be delays as the parameters behind the earthquake (magnitude, location, depth) change. It should definitely be there now- try changing the filters if it's not on the map.