QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem16957883
USGS iscgem16957883
21 Jan 1906, 13:49
50 km SSW of Ōyama, Japan
A magnitude 7.4 mw earthquake at 300 km depth.
Published location
Where is 50 km SSW of Ōyama, 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.
34.175000, 138.025000
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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
iscgem16957883
Coordinates
34.175, 138.025
Network
iscgem
Significance
842