QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem889058
USGS iscgem889058
29 Dec 1956, 20:22
126 km S of ‘Ohonua, Tonga
A magnitude 6.2 mw earthquake at 15 km depth.
Published location
Where is 126 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.
-22.478000, -174.927000
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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
iscgem889058
Coordinates
-22.478, -174.927
Network
iscgem
Significance
595