QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem891037
USGS iscgem891037
6 Sept 1954, 17:47
99 km WNW of Basco, Philippines
A magnitude 6.1 mw earthquake at 25 km depth.
Published location
Where is 99 km WNW 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.
20.724000, 121.064000
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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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Catalog fields and provenance
Event ID
iscgem891037
Coordinates
20.724, 121.064
Network
iscgem
Significance
572