QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0003zh8
USGS usp0003zh8
13 Sept 1989, 12:40
southern Mid-Atlantic Ridge
A magnitude 6.4 mw earthquake at 11.9 km depth.
Published location
Where is southern 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.
-35.577000, -17.063000
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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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Nearby events with a similar magnitude
Catalog fields and provenance
Event ID
usp0003zh8
Coordinates
-35.577, -17.063
Network
us
Significance
630