QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem897539
USGS iscgem897539
8 Sept 1948, 16:09
110 km E of ‘Ohonua, Tonga
A magnitude 7.5 mw earthquake at 15 km depth.
Published location
Where is 110 km E 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.
-21.222000, -173.891000
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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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Nearby events with a similar magnitude
Catalog fields and provenance
Event ID
iscgem897539
Coordinates
-21.222, -173.891
Network
iscgem
Significance
865