QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem863789
USGS iscgem863789
23 Oct 1964, 02:56
North Atlantic Ocean
A magnitude 6.4 mw earthquake at 32.5 km depth.
Published location
Where is North Atlantic Ocean?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
19.720000, -56.098000
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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.
Need a current safety answer?
Use local emergency authorities and the live USGS event page. This historical evidence page is not an alert service.
Catalog fields and provenance
Event ID
iscgem863789
Coordinates
19.72, -56.098
Network
iscgem
Significance
630