QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp00008aq
USGS usp00008aq
8 Oct 1974, 10:50
25 km NW of Saint John’s, Antigua and Barbuda
A magnitude 7.5 ms earthquake at 47 km depth.
Published location
Where is 25 km NW of Saint John’s, Antigua and Barbuda?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
17.300000, -62.000000
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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
usp00008aq
Coordinates
17.3, -62
Network
us
Significance
865