ShakeViewer displays real-time earthquake data from USGS and EMSC sources on an interactive world map. Track magnitude, depth, location, and time for seismic events globally. Filter by depth category (shallow, intermediate, deep), minimum magnitude, and time range.
The moment magnitude scale measures earthquake energy logarithmically. Minor earthquakes below M 3.5 are rarely felt. Moderate earthquakes M 3.5–4.5 may cause minor damage. Strong earthquakes M 4.5–6.0 can cause significant damage in populated areas. Major earthquakes M 6.0+ cause widespread damage.