QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem908714
USGS iscgem908714
1 Jun 1928, 14:12
117 km E of Yamada, Japan
A magnitude 6.8 mw earthquake at 20 km depth.
Published location
Where is 117 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.
39.437000, 143.317000
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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
iscgem908714
Coordinates
39.437, 143.317
Network
iscgem
Significance
701