QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem897893
USGS iscgem897893
13 Jun 1947, 22:24
Mariana Islands region
A magnitude 7 mw earthquake at 35 km depth.
Published location
Where is Mariana Islands region?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
21.774000, 145.474000
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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
iscgem897893
Coordinates
21.774, 145.474
Network
iscgem
Significance
754