M6.1

M 6.1 - 91 km N of Charlotte Amalie, U.S. Virgin Islands

Strong Earthquake · October 11, 2008 · 91 km N of Charlotte Amalie, U.S. Virgin Islands

Key Insights

•This M6.1 strong earthquake ranks #156 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 23.0 km focal depth is classified as intermediate (average: 27 km across all events).
•A USGS significance score of 785 places this among the 265 most impactful events tracked, based on magnitude, felt reports, and damage potential.

Depth

23.0 km

Tsunami

Felt Reports

401

Significance

785

Earthquake Details

Magnitude	M6.1(mwc)
Classification	Strong Earthquake
Location	91 km N of Charlotte Amalie, U.S. Virgin Islands
Date & Time	October 11, 2008 19:40:14
Coordinates	19.1610N, 64.8330W
Depth	23.0 km (Intermediate)
Tsunami	No
Felt Reports	401 reports submitted to USGS
CDI (Community Intensity)	5.3
Significance Score	785 / 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/usp000gjyf

Frequently Asked Questions

How strong was the 91 km N of Charlotte Amalie, U.S. Virgin Islands earthquake?

The 91 km N of Charlotte Amalie, U.S. Virgin Islands earthquake had a magnitude of 6.1 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 19.1610N, 64.8330W, at a depth of 23.0 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?

401 people submitted felt reports to the USGS for this earthquake. The Community Decimal Intensity (CDI) reached 5.3, indicating moderate shaking felt by most people indoors.

When did this earthquake happen and how significant was it?

This earthquake occurred on October 11, 2008 at 19:40:14. The USGS assigned it a significance score of 785 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 M6.1 strong earthquake ranks #156 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 23.0 km focal depth is classified as intermediate (average: 27 km across all events).

•A USGS significance score of 785 places this among the 265 most impactful events tracked, based on magnitude, felt reports, and damage potential.

Earthquake Details

Magnitude

M6.1(mwc)

Classification

Strong Earthquake

Location

91 km N of Charlotte Amalie, U.S. Virgin Islands

Date & Time

October 11, 2008 19:40:14

Coordinates

19.1610N, 64.8330W

Depth

23.0 km (Intermediate)

Tsunami

Felt Reports

401 reports submitted to USGS

CDI (Community Intensity)

5.3

Significance Score

785 / 3,000

Status

reviewed