QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem902740
USGS iscgem902740
5 Nov 1938, 08:43
105 km E of Iwaki, Japan
A magnitude 7.8 mw earthquake at 35 km depth.
Published location
Where is 105 km E 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.
36.971000, 142.065000
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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
iscgem902740
Coordinates
36.971, 142.065
Network
iscgem
Significance
936