M4.8 earthquake - 47 km NNW of Atka, Alaska
3215 d ago · 28 Dec 2017, 14:58 UTC 47 km NNW of Atka, Alaska
A tsunami flag was raised for this event. This does not mean a tsunami occurred. Always follow official tsunami warning centres and local authorities.
What happened
A magnitude 4.8 earthquake struck 47 km NNW of Atka, Alaska on 28 Dec 2017, 14:58 UTC at a depth of 182 km.
Earthquakes of this size are classed as Light. Widely felt nearby; objects may shake or fall. Significant damage is unusual. This was an intermediate-depth earthquake, so shaking is spread over a wider, gentler area.
Timeline
First reported by USGS
17 Oct 2026, 08:51 UTC
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