QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp000j01j
USGS usp000j01j
15 Apr 2011, 22:46
145 km W of Neiafu, Tonga
A magnitude 5.7 mww earthquake at 216.3 km depth.
Published location
Where is 145 km W of Neiafu, 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.
-18.691000, -175.363000
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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
usp000j01j
Coordinates
-18.691, -175.363
Network
us
Significance
500