QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0001fp1
USGS usp0001fp1

4 Sept 1981, 12:15

1 km ENE of Clarin, Philippines

A magnitude 6 mb earthquake at 644.5 km depth.

Depth644.5 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated28 April 2022Latest timestamp stored in this record

Published location

Where is 1 km ENE of Clarin, Philippines?

This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.

9.964000, 124.035000

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Map data © OpenStreetMap contributors

What the numbers mean

Magnitude measures event size; depth locates the source below the surface. Neither value alone establishes local damage or personal risk.

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Continue exploring

Nearby events with a similar magnitude

M 6

6 km NW of Mahanob, Philippines

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28 km NE of Cortes, Philippines

M 6

32 km E of Loreto, Philippines

M 6

3 km ENE of Arteche, Philippines

M 6

19 km ESE of Lazi, Philippines

M 6

16 km NE of Cagdianao, Philippines

Catalog fields and provenance
Event ID
usp0001fp1
Coordinates
9.964, 124.035
Network
us
Significance
554