QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem869629
USGS iscgem869629
19 Mar 1964, 21:44
174 km ENE of Hihifo, Tonga
A magnitude 6.1 mw earthquake at 13.7 km depth.
Published location
Where is 174 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.
-15.532000, -172.226000
Open the interactive map ↗Map data © OpenStreetMap contributors
What the numbers mean
Magnitude measures event size; depth locates the source below the surface. Neither value alone establishes local damage or personal risk.
Need a current safety answer?
Use local emergency authorities and the live USGS event page. This historical evidence page is not an alert service.
Continue exploring
Nearby events with a similar magnitude
Catalog fields and provenance
Event ID
iscgem869629
Coordinates
-15.532, -172.226
Network
iscgem
Significance
569