M6.7

M 6.7 - 66 km W of Nikolski, Alaska

Strong Earthquake · July 18, 2010 · 66 km W of Nikolski, Alaska

Key Insights

•This M6.7 event ranks #41 of 470 earthquakes by magnitude, stronger than 91% of recorded US events.
•At M6.7, this is 1 points above the database average of M5.7. Each whole magnitude point represents roughly 32x more energy released.
•At 14.0 km depth, this is classified as a shallow earthquake. Shallow quakes typically cause stronger ground shaking and more damage than deeper events (avg depth: 27 km).
•A USGS significance score of 696 places this among the 265 most impactful events tracked, based on magnitude, felt reports, and damage potential.

Depth

14.0 km

Tsunami

Felt Reports

Significance

696

Earthquake Details

Magnitude	M6.7(mwc)
Classification	Strong Earthquake
Location	66 km W of Nikolski, Alaska
Date & Time	July 18, 2010 14:56:44
Coordinates	52.8760N, 169.8480W
Depth	14.0 km (Shallow)
Tsunami	No
Felt Reports	14 reports submitted to USGS
CDI (Community Intensity)	4.2
Significance Score	696 / 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 M6.7, 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/usp000hfdm

Frequently Asked Questions

How strong was the 66 km W of Nikolski, Alaska earthquake?

The 66 km W of Nikolski, Alaska earthquake had a magnitude of 6.7 mwc, 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 52.8760N, 169.8480W, at a depth of 14.0 km. Shallow earthquakes (under 20 km) tend to cause more surface damage than deeper events.

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?

14 people submitted felt reports to the USGS for this earthquake. The Community Decimal Intensity (CDI) reached 4.2, indicating moderate shaking felt by most people indoors.

When did this earthquake happen and how significant was it?

This earthquake occurred on July 18, 2010 at 14:56:44. The USGS assigned it a significance score of 696 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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Key Insights

•This M6.7 event ranks #41 of 470 earthquakes by magnitude, stronger than 91% of recorded US events.

•At M6.7, this is 1 points above the database average of M5.7. Each whole magnitude point represents roughly 32x more energy released.

•At 14.0 km depth, this is classified as a shallow earthquake. Shallow quakes typically cause stronger ground shaking and more damage than deeper events (avg depth: 27 km).

•A USGS significance score of 696 places this among the 265 most impactful events tracked, based on magnitude, felt reports, and damage potential.

Frequently Asked Questions

How strong was the 66 km W of Nikolski, Alaska earthquake?

Where exactly did this earthquake occur and how deep was it?

This earthquake struck at coordinates 52.8760N, 169.8480W, at a depth of 14.0 km. Shallow earthquakes (under 20 km) tend to cause more surface damage than deeper events.

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?

14 people submitted felt reports to the USGS for this earthquake. The Community Decimal Intensity (CDI) reached 4.2, indicating moderate shaking felt by most people indoors.

When did this earthquake happen and how significant was it?