QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem902790
USGS iscgem902790
13 Nov 1938, 22:31
200 km ESE of Iwaki, Japan
A magnitude 7.1 mw earthquake at 35 km depth.
Published location
Where is 200 km ESE of Iwaki, 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.
36.482000, 143.020000
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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
iscgem902790
Coordinates
36.482, 143.02
Network
iscgem
Significance
778