Real-time earthquake monitor ·
USGS data
This major M7.4 earthquake was a shallow-focus event, striking at 25 km beneath Miyako, Japan. Major earthquakes at this magnitude cause severe shaking over a wide area, with potential for significant structural damage to buildings and infrastructure not built to modern seismic codes.
At 25 km, this is a very shallow earthquake. Shallow-focus events typically generate stronger surface shaking relative to their magnitude, concentrating energy in a smaller area near the epicenter. A tsunami warning was issued in connection with this event.