QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem861742
USGS iscgem861742
10 Dec 1964, 15:11
70 km WSW of Fukaura, Japan
A magnitude 6.4 mw earthquake at 30 km depth.
Published location
Where is 70 km WSW of Fukaura, 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.
40.444000, 139.139000
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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
iscgem861742
Coordinates
40.444, 139.139
Network
iscgem
Significance
638