QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem865877
USGS iscgem865877
9 Jul 1964, 12:22
221 km SSW of ‘Ohonua, Tonga
A magnitude 6.5 mw earthquake at 28.4 km depth.
Published location
Where is 221 km SSW 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.
-23.281000, -175.478000
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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
iscgem865877
Coordinates
-23.281, -175.478
Network
iscgem
Significance
650