QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem905580
USGS iscgem905580
20 May 1933, 05:38
93 km S of Pangai, Tonga
A magnitude 6.1 mw earthquake at 35 km depth.
Published location
Where is 93 km S of Pangai, 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.
-20.649000, -174.221000
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
iscgem905580
Coordinates
-20.649, -174.221
Network
iscgem
Significance
571