QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0004rfk
USGS usp0004rfk
10 May 1991, 14:33
41 km WSW of Hihifo, Tonga
A magnitude 6.3 mw earthquake at 115.2 km depth.
Published location
Where is 41 km WSW 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.
-16.114000, -174.147000
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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
usp0004rfk
Coordinates
-16.114, -174.147
Network
us
Significance
611