QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp000j09r
USGS usp000j09r
20 Apr 2011, 04:09
54 km NW of Haveluloto, Tonga
A magnitude 5.1 mwc earthquake at 105.3 km depth.
Published location
Where is 54 km NW of Haveluloto, 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.
-20.841000, -175.623000
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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
usp000j09r
Coordinates
-20.841, -175.623
Network
us
Significance
400