QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp000d725
USGS usp000d725
25 Oct 2004, 17:40
northern Mid-Atlantic Ridge
A magnitude 5.4 mwc earthquake at 10 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.
31.620000, -40.904000
Open the interactive map ↗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.
Need a current safety answer?
Use local emergency authorities and the live USGS event page. This historical evidence page is not an alert service.
Continue exploring
Nearby events with a similar magnitude
Catalog fields and provenance
Event ID
usp000d725
Coordinates
31.62, -40.904
Network
us
Significance
449