M6.3

M 6.3 - 237 km SW of Prince Rupert, Canada

Strong Earthquake · October 29, 2012 · 237 km SW of Prince Rupert, Canada

Key Insights

•This M6.3 strong earthquake ranks #105 out of 470 events in the database.
•At M6.3, this is 0.6 points above the database average of M5.7. Each whole magnitude point represents roughly 32x more energy released.
•At 9.0 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 617 places this among the 265 most impactful events tracked, based on magnitude, felt reports, and damage potential.

Depth

9.0 km

Tsunami

Felt Reports

Significance

617

Earthquake Details

Magnitude	M6.3(mww)
Classification	Strong Earthquake
Location	237 km SW of Prince Rupert, Canada
Date & Time	October 29, 2012 03:54:20
Coordinates	52.6740N, 132.6020W
Depth	9.0 km (Shallow)
Tsunami	No
Felt Reports	13 reports submitted to USGS
CDI (Community Intensity)	4.9
MMI (Modified Mercalli)	5.4
Significance Score	617 / 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 M6.3, 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/usp000junu

Frequently Asked Questions

How strong was the 237 km SW of Prince Rupert, Canada earthquake?

The 237 km SW of Prince Rupert, Canada earthquake had a magnitude of 6.3 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 52.6740N, 132.6020W, at a depth of 9.0 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. 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 4.9, indicating moderate shaking felt by most people indoors. The Modified Mercalli Intensity (MMI) was estimated at 5.4.

When did this earthquake happen and how significant was it?

This earthquake occurred on October 29, 2012 at 03:54:20. The USGS assigned it a significance score of 617 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 M6.3 strong earthquake ranks #105 out of 470 events in the database.

•At M6.3, this is 0.6 points above the database average of M5.7. Each whole magnitude point represents roughly 32x more energy released.

•At 9.0 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 617 places this among the 265 most impactful events tracked, based on magnitude, felt reports, and damage potential.

Earthquake Details

Magnitude

M6.3(mww)

Classification

Strong Earthquake

Location

237 km SW of Prince Rupert, Canada

Date & Time

October 29, 2012 03:54:20

Coordinates

52.6740N, 132.6020W

Depth

9.0 km (Shallow)

Tsunami

Felt Reports

13 reports submitted to USGS

CDI (Community Intensity)

4.9

MMI (Modified Mercalli)

5.4

Significance Score

617 / 3,000

Status

reviewed