World map
Countries
Learn
Blog
World map
Countries
Learn
Blog
M 9.1
Share
Copy
2011 Great Tohoku Earthquake, Japan
Fri, 11 Mar 2011 05:46:24 GMT
Depth
29.0 km
Coordinates
142.4° N, 38.3° E
Magnitude Type
mww
Significance
2184
IMPACT ASSESSMENT
Community Intensity (CDI)
9.1
Modified Mercalli Intensity (MMI)
8.2
Significance Score
10.0/10
Map Layers
Liberty
TECHNICAL DETAILS
Stations used
541
Azimuthal gap
9.5°
RMS residual
1.160
Nearest station
N/A
Status
reviewed
Tsunami flag
No
Network
official
Event code
20110311054624120_30
Last updated
Sun, 05 Jul 2026 04:08:38 GMT
ORIGIN & UNCERTAINTY
Latitude
38.297 ±
Longitude
142.373 ±
Horizontal error
km
Vertical error
km
Magnitude error
Depth type
operator assigned
Evaluation status
reviewed
Phases used
ERROR ELLIPSE
Major
3.330 km
Intermediate
2.540 km
Minor
0.000 km
Azimuth
141.99°
QUAKEML / XML PRODUCTS
Origin solution (XML metadata)
Origin solution (QuakeML)
Origin solution (XML metadata)
Origin solution (QuakeML)
Origin solution (XML metadata)
Origin solution (QuakeML)
Origin solution (XML metadata)
Origin solution (QuakeML)
Origin solution (XML metadata)
Origin solution (QuakeML)
Phase picks (XML metadata)
Phase picks (QuakeML)
Phase picks (XML metadata)
Phase picks (QuakeML)
Source: USGS (United States Geological Survey)
M 9.1 – 2011 Great Tohoku Earthquake, Japan
