QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/us2000j21b
USGS us2000j21b
21 Dec 2018, 20:10
central Mid-Atlantic Ridge
A magnitude 5 mb earthquake at 10 km depth.
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.
9.104900, -40.490300
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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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Catalog fields and provenance
Event ID
us2000j21b
Coordinates
9.1049, -40.4903
Network
us
Significance
385