QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usb000k38z
USGS usb000k38z
30 Sept 2013, 23:41
33 km NNE of Kolonga, Tonga
A magnitude 5.4 mb earthquake at 47.5 km depth.
Published location
Where is 33 km NNE 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.
-20.879800, -174.896900
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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
usb000k38z
Coordinates
-20.8798, -174.8969
Network
us
Significance
449