QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0001y1u
USGS usp0001y1u
30 Aug 1983, 09:50
201 km ESE of Hihifo, Tonga
A magnitude 6.1 mw earthquake at 38.7 km depth.
Published location
Where is 201 km ESE 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.
-16.708000, -172.082000
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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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Nearby events with a similar magnitude
Catalog fields and provenance
Event ID
usp0001y1u
Coordinates
-16.708, -172.082
Network
us
Significance
572