QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem900233
USGS iscgem900233
22 Mar 1942, 00:20
122 km SSE of Koshima, Japan
A magnitude 7 mw earthquake at 25 km depth.
Published location
Where is 122 km SSE of Koshima, 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.
29.164000, 130.834000
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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
iscgem900233
Coordinates
29.164, 130.834
Network
iscgem
Significance
758