QuakeCheck: Earthquake Alerts

Know whether alerts are ready, tune every saved location, and explore USGS ShakeMap intensity, event revisions, and official resources.

QuakeCheck brings worldwide USGS earthquake data to your iPhone with a clear map, location-aware notifications, and official post-event resources.

MONITOR WHAT MATTERS

• Explore recently reported earthquakes on an interactive, color-coded map and list • Monitor your current position or save places anywhere in the world • Choose a search radius from 50 to 500 km • Filter by magnitude and depth, and switch between metric and imperial units

MAKE ALERTS YOURS

• Receive push notifications for newly reported earthquakes near monitored locations • Give each saved location its own radius, minimum magnitude, active status, and quiet-hour policy • Use Alert Status to check notification permission, push connection, monitored locations, and USGS feed freshness • Send a real end-to-end test notification • M6+ notifications can use Apple’s Time Sensitive delivery when enabled

UNDERSTAND WHAT HAPPENED

• See magnitude, depth, distance, bearing, time, and event status • View estimated shaking at your selected location from USGS ShakeMap data when available • Follow retained magnitude revisions and cautiously labeled nearby activity • Open the official USGS event page and Did You Feel It reports when available • Access Ready.gov safety guidance and tsunami.gov for flagged events • Share an event or send a personal check-in

PRIVATE BY DESIGN

• No account, advertising, third-party analytics, or cross-app tracking • Location and notifications are optional • Delete server-held notification and saved-location data from Settings • Available in English, Spanish, and Japanese

QuakeCheck uses worldwide USGS Earthquake Hazards Program data. Coverage and optional products vary by region and event.

QuakeCheck is a best-effort informational tool. It is not an emergency alert system, earthquake early warning system, or substitute for official government instructions.