M 9 Earthquake and Tsunami (12 m) in Japan on 11 Mar 2011 05:46 UTC

Hazard models

EQ parameters
Shakemap
Tsunami

Event summary

This earthquake is expected to have a high humanitarian impact based on the magnitude and the affected population and their vulnerability.

Earthquake Magnitude: 9.0M
Glide number: EQ-2011-000028-JPN
Depth: 32 Km
Lat/Lon: 38.322 , 142.369
Event Date: 11 Mar 2011 05:46 UTC
11 Mar 2011 14:46 Local
Exposed Population: 6130000 people in MMI
6.1 million (in MMI>=VII)
Source: NEIC at00lhvpd9
Inserted at: 02 Feb 2017 13:06 UTC

GDACS Score

For more info on GDACS alert score click here.
  Earthquake Tsunami GDACS score
NEIC 0 3 3
at00lhvpd9 Scaled population (vector) n.a Max wave scenario 0m  
  C1 earthquake n.a Max wave realtime 11.95m  
  C2 earthquake n.a      
  Country Vulnerability n.a      
  INFORM_normalised n.a      
Maximum expected impact using different data sources.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
104706 3 11 Mar 2011 05:46 7.9M, 24.4km N/A 10 thousand (in 100km) 4.2m (at 00:34) 2155d 07:19 NEIC
104707 3 11 Mar 2011 05:46 7.9M, 10km N/A No people affected (in 100km) 4.4m (at 00:36) 2155d 07:20 NEIC
104708 3 11 Mar 2011 05:46 8.8M, 24.4km N/A 10 thousand (in 100km) 10.7m (at 00:36) 2155d 07:19 NEIC
104709 2 11 Mar 2011 05:46 7.9M, 10km N/A No people affected (in 100km) 1.8m (at 06:29) 00:43 JMA
104710 3 11 Mar 2011 05:46 8.8M, 24.4km N/A 320 thousand (in 100km) 8.6m (at 06:21) 00:46 NEIC
104712 3 11 Mar 2011 05:46 8.8M, 24.4km N/A 320 thousand (in 100km) 8.6m (at 06:21) 00:48 NEIC
104714 3 11 Mar 2011 05:46 8.8M, 24.4km N/A 320 thousand (in 100km) 8.6m (at 06:21) 00:50 NEIC
104715 3 11 Mar 2011 05:46 8.4M, 10km N/A No people affected (in 100km) 8.3m (at 00:36) 2155d 07:20 NEIC
104716 3 11 Mar 2011 05:46 8.8M, 24.4km N/A 320 thousand (in 100km) 8.6m (at 06:21) 00:53 NEIC
104717 3 11 Mar 2011 05:46 8.8M, 10km N/A No people affected (in 100km) 16.4m (at 00:42) 2155d 07:20 NEIC
104723 3 11 Mar 2011 05:46 8.9M, 24.4km N/A 10 thousand (in 100km) 10.7m (at 00:36) 2155d 07:19 NEIC
105456 3 11 Mar 2011 05:46 9M, 32km N/A 6.1 million (in MMI>=VII) 12m (at 00:48) 2155d 07:19 NEIC
The episode that generated the alert; the next major evaluations beyond 12 hours will not trigger additional alerts.
The episode that has the last updated information.
* The max MMI detected for sources having shakemaps;
** The population detected in MMI>=7 for episode with shakemap or in a 100km radius;
*** The tsunami max height.

Exposed population

The earthquake happened in Japan , Region of Tohoku (population 9,984,608) .

Radius Population
100 km 200000 people
75 km 4800 people
50 km no people
20 km no people
10 km no people
5 km no people
2 km no people

Affected Provinces

Region Province Country Population
Tohoku Japan 10 million people
Kanto Japan 38.5 million people
Chubu Japan 5.2 million people
Hokkaido Japan 5.8 million people

Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

Ports

Name LOCODE Country Distance
Onagawa JPONG Japan 81 km
Ishinomaki JPISM Japan 92 km
Kesennuma Ko Japan 93 km

Nuclear plants

Name Country Reactors Distance
ONAGAWA JAPAN 3 76 km

More information

For a full list of available products related to this event, please refer to the GDACS Resources page.