QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0001rtm
USGS usp0001rtm
28 Dec 1982, 06:37
104 km SSE of Shimoda, Japan
A magnitude 6.3 mw earthquake at 22 km depth.
Published location
Where is 104 km SSE of Shimoda, 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.
33.826000, 139.434000
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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
usp0001rtm
Coordinates
33.826, 139.434
Network
us
Significance
611