QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem900788
USGS iscgem900788
30 Apr 1941, 10:45
258 km SE of Katsuura, Japan
A magnitude 6.2 mw earthquake at 15 km depth.
Published location
Where is 258 km SE of Katsuura, Japan?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
33.723000, 142.543000
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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
iscgem900788
Coordinates
33.723, 142.543
Network
iscgem
Significance
591