QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem874777
USGS iscgem874777
21 May 1962, 22:15
262 km WNW of Haveluloto, Tonga
A magnitude 7.5 mw earthquake at 390 km depth.
Published location
Where is 262 km WNW of Haveluloto, 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.
-20.088000, -177.459000
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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
iscgem874777
Coordinates
-20.088, -177.459
Network
iscgem
Significance
858