QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem805430
USGS iscgem805430

11 Aug 1969, 22:27

1969 Hokkaido Toho-oki Earthquake

A magnitude 8.2 mw earthquake at 28.6 km depth.

Depth28.6 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated19 December 2025Latest timestamp stored in this record

Published location

Where is 1969 Hokkaido Toho-oki Earthquake?

This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.

43.465000, 147.787000

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Map data © OpenStreetMap contributors

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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Nearby events with a similar magnitude

M 8.1

1918 Kuril Islands Earthquake

M 8.3

1958 Kuril Islands Earthquake

M 7.9

128 km ESE of Kuril’sk, Russia

M 8.5

1963 Kuril Islands Earthquake

M 7.83

east of the Kuril Islands

M 7.8

217 km ESE of Kuril’sk, Russia

Catalog fields and provenance
Event ID
iscgem805430
Coordinates
43.465, 147.787
Network
iscgem
Significance
1034