QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem885177
USGS iscgem885177

25 Sept 1958, 08:20

central Mid-Atlantic Ridge

A magnitude 6.4 mw earthquake at 15 km depth.

Depth15 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated26 April 2022Latest timestamp stored in this record

Published location

Where is central 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.

8.027000, -39.300000

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Map data © OpenStreetMap contributors

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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Continue exploring

Nearby events with a similar magnitude

M 6.5

central Mid-Atlantic Ridge

M 6.3

northern Mid-Atlantic Ridge

M 6.28

central Mid-Atlantic Ridge

M 6.6

northern Mid-Atlantic Ridge

M 6.6

central Mid-Atlantic Ridge

M 6.22

northern Mid-Atlantic Ridge

Catalog fields and provenance
Event ID
iscgem885177
Coordinates
8.027, -39.3
Network
iscgem
Significance
634