QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0004ezd
USGS usp0004ezd

23 Sept 1990, 07:50

108 km N of Hihifo, Tonga

A magnitude 6 mw earthquake at 33 km depth.

Depth33 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated28 April 2022Latest timestamp stored in this record

Published location

Where is 108 km N 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.

-14.989000, -173.632000

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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

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

M 6

140 km W of Hihifo, Tonga

M 6

172 km WNW of Hihifo, Tonga

M 6

77 km NE of Hihifo, Tonga

Catalog fields and provenance
Event ID
usp0004ezd
Coordinates
-14.989, -173.632
Network
us
Significance
554