QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0000u5g
USGS usp0000u5g
18 Apr 1978, 18:27
191 km SE of Pondaguitan, Philippines
A magnitude 6 mb earthquake at 128 km depth.
Published location
Where is 191 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.
5.142000, 127.410000
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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
usp0000u5g
Coordinates
5.142, 127.41
Network
us
Significance
554