QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0004jdq
USGS usp0004jdq
21 Dec 1990, 05:29
74 km SSE of Pangai, Tonga
A magnitude 6.8 mw earthquake at 13.3 km depth.
Published location
Where is 74 km SSE of Pangai, 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.
-20.467000, -174.161000
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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
usp0004jdq
Coordinates
-20.467, -174.161
Network
us
Significance
711