QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp000cgbm
USGS usp000cgbm
28 Dec 2003, 04:45
51 km ESE of Koshima, Japan
A magnitude 5.2 mwc earthquake at 31.9 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.
30.015000, 131.002000
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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
usp000cgbm
Coordinates
30.015, 131.002
Network
us
Significance
416