QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0002v80
USGS usp0002v80
20 Jun 1986, 18:12
263 km NE of Saga, China
A magnitude 6.1 mw earthquake at 33 km depth.
Published location
Where is 263 km NE of Saga, China?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
31.240000, 86.847000
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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
usp0002v80
Coordinates
31.24, 86.847
Network
us
Significance
572