M6.5

M 6.5 - 6 km SSW of Nuevo Balsas, Mexico

Strong Earthquake · December 11, 2011 · 6 km SSW of Nuevo Balsas, Mexico

Key Insights

•This M6.5 event ranks #64 of 470 earthquakes by magnitude, stronger than 86% of recorded US events.
•At M6.5, this is 0.8 points above the database average of M5.7. Each whole magnitude point represents roughly 32x more energy released.
•The 59.0 km focal depth is classified as intermediate (average: 27 km across all events).
•With 1,318 "Did You Feel It?" reports submitted to USGS, this was widely felt by the public. The significance score of 1410 reflects its overall community impact.

Depth

59.0 km

Tsunami

Felt Reports

1,318

Significance

1410

Earthquake Details

Magnitude	M6.5(mww)
Classification	Strong Earthquake
Location	6 km SSW of Nuevo Balsas, Mexico
Date & Time	December 11, 2011 10:47:25
Coordinates	17.9860N, 99.7890W
Depth	59.0 km (Intermediate)
Tsunami	No
Felt Reports	1,318 reports submitted to USGS
CDI (Community Intensity)	7.6
MMI (Modified Mercalli)	7.2
Significance Score	1410 / 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 M6.5, 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/usp000jc1y

Frequently Asked Questions

How strong was the 6 km SSW of Nuevo Balsas, Mexico earthquake?

The 6 km SSW of Nuevo Balsas, Mexico earthquake had a magnitude of 6.5 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 17.9860N, 99.7890W, at a depth of 59.0 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. While the magnitude was significant, the location and depth characteristics did not warrant a tsunami advisory.

How many people felt this earthquake?

1,318 people submitted felt reports to the USGS for this earthquake. The Community Decimal Intensity (CDI) reached 7.6, indicating strong to very strong shaking with potential for damage. The Modified Mercalli Intensity (MMI) was estimated at 7.2.

When did this earthquake happen and how significant was it?

This earthquake occurred on December 11, 2011 at 10:47:25. The USGS assigned it a significance score of 1410 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 M6.5 event ranks #64 of 470 earthquakes by magnitude, stronger than 86% of recorded US events.

•At M6.5, this is 0.8 points above the database average of M5.7. Each whole magnitude point represents roughly 32x more energy released.

•The 59.0 km focal depth is classified as intermediate (average: 27 km across all events).

•With 1,318 "Did You Feel It?" reports submitted to USGS, this was widely felt by the public. The significance score of 1410 reflects its overall community impact.

Earthquake Details

Magnitude

M6.5(mww)

Classification

Strong Earthquake

Location

6 km SSW of Nuevo Balsas, Mexico

Date & Time

December 11, 2011 10:47:25

Coordinates

17.9860N, 99.7890W

Depth

59.0 km (Intermediate)

Tsunami

Felt Reports

1,318 reports submitted to USGS

CDI (Community Intensity)

7.6

MMI (Modified Mercalli)

7.2

Significance Score

1410 / 3,000

Status

reviewed