QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem817397
USGS iscgem817397
26 Sept 1968, 15:37
166 km W of Haveluloto, Tonga
A magnitude 6.1 mw earthquake at 249.2 km depth.
Published location
Where is 166 km W 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.
-21.071000, -176.812000
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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
iscgem817397
Coordinates
-21.071, -176.812
Network
iscgem
Significance
572