QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem774049
USGS iscgem774049

2 Apr 1972, 10:01

87 km E of Hihifo, Tonga

A magnitude 6 mw earthquake at 8.7 km depth.

Depth8.7 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated19 December 2025Latest timestamp stored in this record

Published location

Where is 87 km E 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.

-16.077000, -172.990000

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Map data © OpenStreetMap contributors

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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Nearby events with a similar magnitude

M 6.01

125 km ENE of Hihifo, Tonga

M 6.01

220 km WNW of Hihifo, Tonga

M 6.02

110 km NE of Hihifo, Tonga

M 6

220 km S of Mata-Utu, Wallis and Futuna

M 6

136 km SSW of Gataivai, Samoa

M 6

276 km SSE of Alo, Wallis and Futuna

Catalog fields and provenance
Event ID
iscgem774049
Coordinates
-16.077, -172.99
Network
iscgem
Significance
556