QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp000392g
USGS usp000392g
8 Oct 1987, 04:20
132 km E of Pangai, Tonga
A magnitude 6.3 mw earthquake at 40.4 km depth.
Published location
Where is 132 km E 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.
-19.599000, -173.111000
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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
usp000392g
Coordinates
-19.599, -173.111
Network
us
Significance
611