M6.4

M 6.4 - 66 km SW of Vernon, Canada

Strong Earthquake · September 10, 2011 · 66 km SW of Vernon, Canada

Key Insights

•This M6.4 strong earthquake ranks #82 out of 470 events in the database.
•At M6.4, this is 0.7 points above the database average of M5.7. Each whole magnitude point represents roughly 32x more energy released.
•The 22.0 km focal depth is classified as intermediate (average: 27 km across all events).
•With 3,338 "Did You Feel It?" reports submitted to USGS, this was widely felt by the public. The significance score of 1110 reflects its overall community impact.

Depth

22.0 km

Tsunami

Felt Reports

3,338

Significance

1110

Earthquake Details

Magnitude	M6.4(mww)
Classification	Strong Earthquake
Location	66 km SW of Vernon, Canada
Date & Time	September 10, 2011 04:41:34
Coordinates	49.5350N, 126.8930W
Depth	22.0 km (Intermediate)
Tsunami	No
Felt Reports	3,338 reports submitted to USGS
CDI (Community Intensity)	4.8
MMI (Modified Mercalli)	6.6
Significance Score	1110 / 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 M6.4, 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/usp000j7ur

Frequently Asked Questions

How strong was the 66 km SW of Vernon, Canada earthquake?

The 66 km SW of Vernon, Canada earthquake had a magnitude of 6.4 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 49.5350N, 126.8930W, at a depth of 22.0 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?

3,338 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. The Modified Mercalli Intensity (MMI) was estimated at 6.6.

When did this earthquake happen and how significant was it?

This earthquake occurred on September 10, 2011 at 04:41:34. The USGS assigned it a significance score of 1110 out of a possible 3,000, which factors in magnitude, felt reports, and potential impact. This is considered a highly significant seismic event.

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Key Insights

•This M6.4 strong earthquake ranks #82 out of 470 events in the database.

•At M6.4, this is 0.7 points above the database average of M5.7. Each whole magnitude point represents roughly 32x more energy released.

•The 22.0 km focal depth is classified as intermediate (average: 27 km across all events).

•With 3,338 "Did You Feel It?" reports submitted to USGS, this was widely felt by the public. The significance score of 1110 reflects its overall community impact.

Earthquake Details

Magnitude

M6.4(mww)

Classification

Strong Earthquake

Location

66 km SW of Vernon, Canada

Date & Time

September 10, 2011 04:41:34

Coordinates

49.5350N, 126.8930W

Depth

22.0 km (Intermediate)

Tsunami

Felt Reports

3,338 reports submitted to USGS

CDI (Community Intensity)

4.8

MMI (Modified Mercalli)

6.6

Significance Score

1110 / 3,000

Status

reviewed