QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem887612
USGS iscgem887612
29 Nov 1957, 22:19
51 km W of Atocha, Bolivia
A magnitude 7.7 mw earthquake at 232.5 km depth.
Published location
Where is 51 km W of Atocha, Bolivia?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
-20.948000, -66.713000
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
iscgem887612
Coordinates
-20.948, -66.713
Network
iscgem
Significance
912