QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp00035kr
USGS usp00035kr

7 Jun 1987, 06:49

63 km W of Basco, Philippines

A magnitude 6.3 mw earthquake at 14.8 km depth.

Depth14.8 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated27 April 2022Latest timestamp stored in this record

Published location

Where is 63 km W of Basco, 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.

20.429000, 121.366000

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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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Nearby events with a similar magnitude

M 6.3

59 km NE of Hengchun, Taiwan

M 6.3

13 km E of Basco, Philippines

M 6.3

113 km ESE of Hengchun, Taiwan

M 6.3

167 km SSW of Hengchun, Taiwan

M 6.3

74 km WSW of Basco, Philippines

M 6.29

100 km SW of Kaohsiung, Taiwan

Catalog fields and provenance
Event ID
usp00035kr
Coordinates
20.429, 121.366
Network
us
Significance
611