QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem821004
USGS iscgem821004
22 Jun 1968, 02:12
166 km E of Noda, Japan
A magnitude 6.1 mw earthquake at 20.9 km depth.
Published location
Where is 166 km E of Noda, 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.
40.404000, 143.740000
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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
iscgem821004
Coordinates
40.404, 143.74
Network
iscgem
Significance
574