QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem875768
USGS iscgem875768
7 Dec 1962, 14:03
Izu Islands, Japan region
A magnitude 6.6 mw earthquake at 431.2 km depth.
Published location
Where is Izu Islands, Japan region?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
29.270000, 139.329000
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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
iscgem875768
Coordinates
29.27, 139.329
Network
iscgem
Significance
668