QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp00012kf
USGS usp00012kf
24 Aug 1979, 05:26
4 km ESE of Ciudad Cortés, Costa Rica
A magnitude 6.4 ms earthquake at 40 km depth.
Published location
Where is 4 km ESE of Ciudad Cortés, Costa Rica?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
8.951000, -83.483000
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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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Nearby events with a similar magnitude
Catalog fields and provenance
Event ID
usp00012kf
Coordinates
8.951, -83.483
Network
us
Significance
630