M 4.9 in Japan on 17 Apr 2012 04:25 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: 4.9M
Depth: 40 Km
Lat/Lon: 38.3503 , 142.212
Event Date: 17 Apr 2012 04:25 UTC
17 Apr 2012 13:25 Local
Exposed Population:
640000 people within 100km
Source: NEIC usc00095au
Inserted at: 17 Apr 2012 05:13 UTC

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
NEIC 0.5 0.5
usc00095au 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
116164 0.5 17 Apr 2012 04:25 4.9M, 40km N/A 640 thousand (in 100km) 00:48 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) . The nearest places are Niiyama, Yoriiso, Terama, Tomari, Oshika, Izushima, Osu, Kumazawa, Ayukawahama, Kuwahama, and Nitoda.

Radius Population
100 km 440000 people
75 km 50000 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

Affected populated places

Name Region Province Country City class Population Distance
Niiyama Miyagi Japan Village - 60 km
Yoriiso Miyagi Japan Village - 60 km
Terama Miyagi Japan Village - 60 km
Tomari Miyagi Japan Village - 60 km
Oshika Miyagi Japan Village - 61 km
Izushima Miyagi Japan Village - 62 km
Osu Miyagi Japan Village - 62 km
Kumazawa Miyagi Japan Village - 62 km
Ayukawahama Miyagi Japan Village - 62 km
Kuwahama Miyagi Japan Village - 62 km
Tatsuhama Miyagi Japan Village - 63 km
Kukunari Miyagi Japan Village - 63 km
Samenoura Miyagi Japan Village - 63 km
Yagawa Miyagi Japan Village - 63 km
Ohama Miyagi Japan Village - 64 km
Futawatashi Miyagi Japan Village - 64 km
Funagoshi Miyagi Japan Village - 64 km
Oharahama Miyagi Japan Village - 65 km
Kobuchi Miyagi Japan Village - 65 km
Aji Miyagi Japan Village - 66 km
Ommaehama Miyagi Japan Village - 66 km
Koamikura Miyagi Japan Village - 66 km
Ikenohama Miyagi Japan Village - 66 km
Ogatsu Miyagi Japan Village - 67 km
Ozashi Miyagi Japan Village - 67 km
Fukkiura Miyagi Japan Village - 67 km
Kodaki Miyagi Japan Village - 67 km
Onagawahama Miyagi Japan Village - 68 km
Takenohama Miyagi Japan Village - 68 km
Aikawa Miyagi Japan Village - 68 km
Terahama Miyagi Japan Village - 68 km
Tomarihama Miyagi Japan Village - 69 km
Kitsunezaki Miyagi Japan Village - 69 km
Odomari Miyagi Japan Village - 70 km
Tsukihama Miyagi Japan Village - 70 km
Nitoda Miyagi Japan Village - 70 km

see full list

Critical infrastructure

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

Airports

Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft) Distance
Matsushima 2 Civ. Paved Yes 8800 87 km

Ports

Name LOCODE Country Distance
Onagawa JPONG Japan 67 km
Kesennuma Ko Japan 78 km
Ishinomaki JPISM Japan 78 km
Ofunato JPOFT Japan 89 km

Nuclear plants

Name Country Reactors Distance
ONAGAWA JAPAN 3 62 km

More information

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