M 4.6 in Japan on 18 Dec 2012 10:26 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: 4.6M
Depth: 77.2 Km
Lat/Lon: 38.637 , 140.006
Event Date: 18 Dec 2012 10:26 UTC
18 Dec 2012 19:26 Local
Exposed Population:
3630000 people within 100km
Source: NEIC usc000ebsq
Inserted at: 18 Dec 2012 10:54 UTC

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
NEIC 0.5 0.5
usc000ebsq 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
121504 0.5 18 Dec 2012 10:26 4.6M, 77.2km N/A 3.6 million (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) . The nearest places are Yamagata, and Kinosawa.

Radius Population
100 km 3.7 million people
75 km 1.4 million people
50 km 780000 people
20 km 120000 people
10 km 2200 people
5 km <1000 people
2 km <1000 people

Affected Provinces

Region Province Country Population
Tohoku Japan 10 million people

Affected populated places

Name Region Province Country City class Population Distance
Kinosawa Yamagata Japan Village - 8 km
Yamagata Yamagata Japan Major city 250000 people 51 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
Shonai SYO 22 Civ. Paved Yes 6500 27 km
Junmachi GAJ 108 Civ. Paved Yes 6500 40 km

Ports

Name LOCODE Country Distance
Sakata JPSKT Japan 34 km
Shiogama JPSGM Japan 96 km
Niigata-Higashi Japan 99 km

Dams

Reservoir Dam Name River Year Distance
Yakuwa Yakuwa Bonjigawa 1957 18 km

More information

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