QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem824136
USGS iscgem824136
20 Apr 1968, 13:25
124 km ENE of Hihifo, Tonga
A magnitude 6.3 mw earthquake at 17.1 km depth.
Published location
Where is 124 km ENE of Hihifo, 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.
-15.664000, -172.672000
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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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Catalog fields and provenance
Event ID
iscgem824136
Coordinates
-15.664, -172.672
Network
iscgem
Significance
611