QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp00022cs
USGS usp00022cs
1 Mar 1984, 19:21
central East Pacific Rise
A magnitude 6 mw earthquake at 10 km depth.
Published location
Where is central East Pacific Rise?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
-4.520000, -105.993000
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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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Nearby events with a similar magnitude
Catalog fields and provenance
Event ID
usp00022cs
Coordinates
-4.52, -105.993
Network
us
Significance
554