QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem911356
USGS iscgem911356
4 May 1923, 23:26
72 km WSW of Vallenar, Chile
A magnitude 6.6 mw earthquake at 35 km depth.
Published location
Where is 72 km WSW of Vallenar, 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.
-28.890000, -71.405000
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
iscgem911356
Coordinates
-28.89, -71.405
Network
iscgem
Significance
662