How strong was the 101 km SW of Atka, Alaska earthquake?
The 101 km SW of Atka, Alaska earthquake had a magnitude of 7 mww, classified as a "Major" earthquake on the magnitude scale. Earthquakes of this size can cause serious damage to buildings and infrastructure over a wide area.
Where exactly did this earthquake occur and how deep was it?
This earthquake struck at coordinates 51.5370N, 175.2297W, at a depth of 29.0 km. This intermediate depth can still produce significant shaking at the surface.
Did this earthquake trigger a tsunami warning?
No tsunami warning was issued for this earthquake. While the magnitude was significant, the location and depth characteristics did not warrant a tsunami advisory.
How many people felt this earthquake?
9 people submitted felt reports to the USGS for this earthquake. The Community Decimal Intensity (CDI) reached 4.6, indicating moderate shaking felt by most people indoors. The Modified Mercalli Intensity (MMI) was estimated at 6.4.
When did this earthquake happen and how significant was it?
This earthquake occurred on August 31, 2013 at 01:25:02. The USGS assigned it a significance score of 758 out of a possible 3,000, which factors in magnitude, felt reports, and potential impact. This is a moderately significant seismic event. The PAGER alert level was "green", indicating the estimated level of response needed.