QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem889811
USGS iscgem889811
6 Aug 1955, 09:31
255 km W of Haveluloto, Tonga
A magnitude 6.7 mw earthquake at 360.2 km depth.
Published location
Where is 255 km W 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.
-20.955000, -177.666000
Open the interactive map ↗Map data © OpenStreetMap contributors
What the numbers mean
Magnitude measures event size; depth locates the source below the surface. Neither value alone establishes local damage or personal risk.
Need a current safety answer?
Use local emergency authorities and the live USGS event page. This historical evidence page is not an alert service.
Continue exploring
Nearby events with a similar magnitude
Catalog fields and provenance
Event ID
iscgem889811
Coordinates
-20.955, -177.666
Network
iscgem
Significance
691