M 4.5 in Japan on 11 Sep 2012 11:12 UTC

Hazard models

EQ parameters
Shakemap
Tsunami

Event summary

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

Earthquake Magnitude: 4.5M
Depth: Km
Lat/Lon: 37.4778 , 141.932
Event Date: 11 Sep 2012 11:12 UTC
11 Sep 2012 20:12 Local
Exposed Population:
210000 people within 100km
Source: NEIC usc000cl4i
Inserted at: 11 Sep 2012 11:41 UTC

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
NEIC 0.5 0.5
usc000cl4i Scaled population (vector) n.a  
  C1 earthquake n.a  
  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
119540 0.5 11 Sep 2012 11:12 4.5M, 42.3km N/A 210 thousand (in 100km) 00:28 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 150000 people
75 km no 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
Soma JPSMA Japan 94 km

Dams

Reservoir Dam Name River Year Distance
Sakashita Sakashita Okawaragawa 1973 88 km
Yokokawa Yokokawa Otagawa 1983 92 km
Ogaki Ogaki Ukedogawa 1985 93 km
Takanokura Takanokura Mizunashigawa 1975 94 km

More information

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