QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem886936
USGS iscgem886936
29 Jul 1957, 18:15
61 km WNW of Antofagasta, Chile
A magnitude 6.5 mw earthquake at 15 km depth.
Published location
Where is 61 km WNW of Antofagasta, Chile?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
-23.409000, -70.940000
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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
iscgem886936
Coordinates
-23.409, -70.94
Network
iscgem
Significance
650