QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/us6000dfsx
USGS us6000dfsx
9 Feb 2021, 03:39
51 km ESE of Koshima, Japan
A magnitude 5 mb earthquake at 35 km depth.
Published location
Where is 51 km ESE 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.
30.052000, 131.021400
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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
us6000dfsx
Coordinates
30.052, 131.0214
Network
us
Significance
385