QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0001fkx
USGS usp0001fkx
1 Sept 1981, 10:29
133 km NE of Hihifo, Tonga
A magnitude 7.7 ms earthquake at 25 km depth.
Published location
Where is 133 km NE of Hihifo, Tonga?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
-14.960000, -173.085000
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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
usp0001fkx
Coordinates
-14.96, -173.085
Network
us
Significance
912