QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0003bbq
USGS usp0003bbq
17 Dec 1987, 02:08
10 km SW of Mobara, Japan
A magnitude 6.7 mw earthquake at 62.9 km depth.
Published location
Where is 10 km SW of Mobara, 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.
35.362000, 140.214000
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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
usp0003bbq
Coordinates
35.362, 140.214
Network
us
Significance
691