QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/official20110311054624120_30
USGS official20110311054624120_30

11 Mar 2011, 05:46

2011 Great Tohoku Earthquake, Japan

A magnitude 9.1 mww earthquake at 29 km depth.

Depth29 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated15 August 2026Latest timestamp stored in this record

Published location

Where is 2011 Great Tohoku Earthquake, 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.

38.297000, 142.373000

Open the interactive map ↗

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.

Need a current safety answer?

Use local emergency authorities and the live USGS event page. This historical evidence page is not an alert service.

Open the USGS event →

Continue exploring

Nearby events with a similar magnitude

M 7.92

78 km E of Hachinohe, Japan

M 7.7

68 km ESE of Ishinomaki, Japan

M 7.6

27 km NW of Murakami, Japan

M 7.6

2025 Aomori Prefecture, Japan Earthquake

M 7.5

Near the east coast of Honshu, Japan

M 7.4

83 km WNW of Noshiro, Japan

Catalog fields and provenance
Event ID
official20110311054624120_30
Coordinates
38.297, 142.373
Network
official
Significance
2184