M6.1

M 6.1 - 72 km ESE of King Cove, Alaska

Strong Earthquake · July 17, 2011 · 72 km ESE of King Cove, Alaska

Key Insights

•This M6.1 strong earthquake ranks #154 out of 470 events in the database.
•At M6.1, this is 0.4 points above the database average of M5.7. Each whole magnitude point represents roughly 32x more energy released.
•The 36.0 km focal depth is classified as intermediate (average: 27 km across all events).
•A USGS significance score of 579 places this among the 265 most impactful events tracked, based on magnitude, felt reports, and damage potential.

Depth

36.0 km

Tsunami

Felt Reports

Significance

579

Earthquake Details

Magnitude	M6.1(mww)
Classification	Strong Earthquake
Location	72 km ESE of King Cove, Alaska
Date & Time	July 17, 2011 04:59:12
Coordinates	54.7870N, 161.2900W
Depth	36.0 km (Intermediate)
Tsunami	No
Felt Reports	13 reports submitted to USGS
CDI (Community Intensity)	4.8
Significance Score	579 / 3,000
Status	reviewed

Magnitude Scale Context

Minor

3-3.9

Light

4-4.9

Moderate

5-5.9

Strong

6-6.9

Major

At M6.1, this is classified as a Strong earthquake. Earthquakes of this size can cause severe damage in populated areas within tens of miles of the epicenter.

Official USGS Page: https://earthquake.usgs.gov/earthquakes/eventpage/usp000j51f

Frequently Asked Questions

How strong was the 72 km ESE of King Cove, Alaska earthquake?

The 72 km ESE of King Cove, Alaska earthquake had a magnitude of 6.1 mww, classified as a "Strong" 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 54.7870N, 161.2900W, at a depth of 36.0 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. Earthquakes below magnitude 6.5 rarely generate dangerous tsunamis, though localized effects are possible in rare cases.

How many people felt this earthquake?

13 people submitted felt reports to the USGS for this earthquake. The Community Decimal Intensity (CDI) reached 4.8, indicating moderate shaking felt by most people indoors.

When did this earthquake happen and how significant was it?

This earthquake occurred on July 17, 2011 at 04:59:12. The USGS assigned it a significance score of 579 out of a possible 3,000, which factors in magnitude, felt reports, and potential impact. This is a moderately significant seismic event.

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