QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0003udb
USGS usp0003udb
25 Apr 1989, 15:29
7 km ESE of San Marcos, Mexico
A magnitude 6.9 mw earthquake at 19.2 km depth.
Published location
Where is 7 km ESE of San Marcos, Mexico?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
16.773000, -99.328000
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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
usp0003udb
Coordinates
16.773, -99.328
Network
us
Significance
732