QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0003b5y
USGS usp0003b5y
11 Dec 1987, 02:03
92 km S of ‘Ohonua, Tonga
A magnitude 6 mw earthquake at 36.9 km depth.
Published location
Where is 92 km S of ‘Ohonua, 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.
-22.156000, -174.797000
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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
usp0003b5y
Coordinates
-22.156, -174.797
Network
us
Significance
554