QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgemsup913945
USGS iscgemsup913945
8 Oct 1915, 15:36
139 km S of Ōyama, Japan
A magnitude 7 mB earthquake at 290 km depth.
Published location
Where is 139 km S 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.
33.353000, 138.045000
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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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Nearby events with a similar magnitude
Catalog fields and provenance
Event ID
iscgemsup913945
Coordinates
33.353, 138.045
Network
iscgemsup
Significance
754