QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem901940
USGS iscgem901940
6 May 1939, 18:00
3 km SSE of Mapulo, Philippines
A magnitude 6.3 mw earthquake at 10 km depth.
Published location
Where is 3 km SSE of Mapulo, 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.
13.700000, 121.194000
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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
iscgem901940
Coordinates
13.7, 121.194
Network
iscgem
Significance
605