How strong was the 186 km E of Atka, Alaska earthquake?
Magnitude 3.9 (mb), minor – felt by people near the epicenter. Depth 52 km. Strongest estimated shaking: intensity 2.5 on the Modified Mercalli scale.
Was it felt?
No felt reports have been submitted to the USGS so far.
Were there aftershocks?
No earthquakes within 100 km have followed so far in our records.
Earthquakes
More
Source: U.S. Geological Survey (USGS) earthquake catalog, real-time feeds and FDSN event service; magnitudes and locations are revised by seismologists for hours after an event. Times are Eastern (ET) unless marked UTC. Not an alert service: for warnings follow local authorities and tsunami centers.
Cookies
We measure traffic so we know which stories you care about. You can change your choice at any time.
M3.9 earthquake 186 km E of Atka, Alaska — 77.today