QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/us2000ddpy
USGS us2000ddpy
7 Mar 2018, 10:39
Alamagan region, Northern Mariana Islands
A magnitude 5.1 mb earthquake at 215.5 km depth.
Published location
Where is Alamagan region, Northern Mariana Islands?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
17.987200, 145.520300
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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
us2000ddpy
Coordinates
17.9872, 145.5203
Network
us
Significance
400