QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0003380
USGS usp0003380
12 Mar 1987, 12:18
68 km S of San Francisco del Mar Viejo, Mexico
A magnitude 6.1 mw earthquake at 40 km depth.
Published location
Where is 68 km S of San Francisco del Mar Viejo, 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.
15.610000, -94.597000
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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
usp0003380
Coordinates
15.61, -94.597
Network
us
Significance
572