M6.4

M 6.4 - 236 km WSW of La Cruz de Loreto, Mexico

Strong Earthquake · September 24, 2009 · 236 km WSW of La Cruz de Loreto, Mexico

Key Insights

•This M6.4 strong earthquake ranks #86 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.
•At 13.0 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 631 places this among the 265 most impactful events tracked, based on magnitude, felt reports, and damage potential.

Depth

13.0 km

Tsunami

Felt Reports

Significance

631

Earthquake Details

Magnitude	M6.4(mwc)
Classification	Strong Earthquake
Location	236 km WSW of La Cruz de Loreto, Mexico
Date & Time	September 24, 2009 16:16:20
Coordinates	18.8290N, 107.3390W
Depth	13.0 km (Shallow)
Tsunami	No
Felt Reports	5 reports submitted to USGS
CDI (Community Intensity)	2.2
Significance Score	631 / 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/usp000h1tv

Frequently Asked Questions

How strong was the 236 km WSW of La Cruz de Loreto, Mexico earthquake?

The 236 km WSW of La Cruz de Loreto, Mexico earthquake had a magnitude of 6.4 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 18.8290N, 107.3390W, at a depth of 13.0 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?

5 people submitted felt reports to the USGS for this earthquake. The Community Decimal Intensity (CDI) reached 2.2, indicating light shaking noticed by some people.

When did this earthquake happen and how significant was it?

This earthquake occurred on September 24, 2009 at 16:16:20. The USGS assigned it a significance score of 631 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 M6.4 strong earthquake ranks #86 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.

•At 13.0 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 631 places this among the 265 most impactful events tracked, based on magnitude, felt reports, and damage potential.

Earthquake Details

Magnitude

M6.4(mwc)

Classification

Strong Earthquake

Location

236 km WSW of La Cruz de Loreto, Mexico

Date & Time

September 24, 2009 16:16:20

Coordinates

18.8290N, 107.3390W

Depth

13.0 km (Shallow)

Tsunami

Felt Reports

5 reports submitted to USGS

CDI (Community Intensity)

2.2

Significance Score

631 / 3,000

Status

reviewed