QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem895478
USGS iscgem895478
31 May 1950, 14:13
42 km S of Koshima, Japan
A magnitude 6.2 mw earthquake at 46 km depth.
Published location
Where is 42 km S of Koshima, 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.
29.853000, 130.607000
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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
iscgem895478
Coordinates
29.853, 130.607
Network
iscgem
Significance
588