SeismoTotal · USGS
Use cases
In the classroom
Compare two radii with the same centre, period and minimum magnitude. Save the parameters and explain why a larger sample does not imply greater danger to a building.
Check a news story
Open the USGS record and note UTC time, magnitude, depth and access date. Check for updates before sharing figures.
Explore a location
Check the exact coordinates, then change one variable at a time. Keep the catalogue link with the result; do not treat different windows or thresholds as equivalent.
Prepare for a trip
Explore recorded activity and consult the destination's civil-protection guidance. This map cannot determine whether travel will be safe and does not send emergency alerts.