QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem913430
USGS iscgem913430
15 Mar 1917, 00:14
148 km E of Yamada, Japan
A magnitude 6.9 mw earthquake at 15 km depth.
Published location
Where is 148 km E of Yamada, 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.
39.482000, 143.674000
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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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Catalog fields and provenance
Event ID
iscgem913430
Coordinates
39.482, 143.674
Network
iscgem
Significance
737