QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem872348
USGS iscgem872348
19 May 1963, 22:35
northern Mid-Atlantic Ridge
A magnitude 6.4 mw earthquake at 22.5 km depth.
Published location
Where is northern Mid-Atlantic Ridge?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
23.724000, -45.818000
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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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Catalog fields and provenance
Event ID
iscgem872348
Coordinates
23.724, -45.818
Network
iscgem
Significance
632