QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/us1000h9qy
USGS us1000h9qy
10 Oct 2018, 00:12
150 km W of Neiafu, Tonga
A magnitude 5.1 mb earthquake at 232 km depth.
Published location
Where is 150 km W of Neiafu, 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.
-18.480700, -175.398600
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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
us1000h9qy
Coordinates
-18.4807, -175.3986
Network
us
Significance
400