QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem897937
USGS iscgem897937
12 Jul 1947, 14:29
93 km SSE of Pangai, Tonga
A magnitude 6.1 mw earthquake at 35 km depth.
Published location
Where is 93 km SSE of Pangai, 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.
-20.541000, -173.894000
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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
iscgem897937
Coordinates
-20.541, -173.894
Network
iscgem
Significance
580