QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp00087cb
USGS usp00087cb
10 Sept 1997, 13:57
58 km E of ‘Ohonua, Tonga
A magnitude 6.1 mwb earthquake at 10 km depth.
Published location
Where is 58 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.
-21.349000, -174.386000
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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
usp00087cb
Coordinates
-21.349, -174.386
Network
us
Significance
572