QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp00039qx
USGS usp00039qx
29 Oct 1987, 20:23
239 km SE of Pondaguitan, Philippines
A magnitude 6.8 mw earthquake at 152.9 km depth.
Published location
Where is 239 km SE of Pondaguitan, 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.
4.817000, 127.688000
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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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Use local emergency authorities and the live USGS event page. This historical evidence page is not an alert service.
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Catalog fields and provenance
Event ID
usp00039qx
Coordinates
4.817, 127.688
Network
us
Significance
711