QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem16964661
USGS iscgem16964661
5 Apr 1935, 02:55
8 km NNW of Kolonga, Tonga
A magnitude 6.3 mw earthquake at 30 km depth.
Published location
Where is 8 km NNW of Kolonga, 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.
-21.063000, -175.094000
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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
iscgem16964661
Coordinates
-21.063, -175.094
Network
iscgem
Significance
605