M 4.6 in Japan on 21 Dec 2014 16:17 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: 21.21 Km
Lat/Lon: 36.5889 , 138.0258
Event Date: 21 Dec 2014 16:17 UTC
22 Dec 2014 01:17 Local
Exposed Population:
4820244 people within 100km
Source: NEIC
Inserted at: 21 Dec 2014 19:05 UTC

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
NEIC 0 0
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
1067867 0 21 Dec 2014 16:17 4.6M, 21.21km N/A 4.8 million (in 100km) 02:47 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 Chubu (population 5,172,046) . The nearest places are Nagano, Shimmachi, Hishagi, Shinshu, Shimo-Nagai, Wakiuke, and Nakaio.

Radius Population
100 km 4.8 million people
75 km 2.7 million people
50 km 1.4 million people
20 km 450000 people
10 km 49000 people
5 km 7000 people
2 km <1000 people

Affected Provinces

Region Province Country Population
Chubu Japan 5.2 million people

Affected populated places

Name Region Province Country City class Population Distance
Shimo-Nagai Nagano Japan Village - 1 km
Shimmachi Nagano Japan Village - 2 km
Shinshu Nagano Japan Village - 3 km
Wakiuke Nagano Japan Village - 3 km
Nakaio Nagano Japan Village - 3 km
Hishagi Nagano Japan Village - 4 km
Nagano Nagano Japan Major city 360000 people 16 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
Nagano 347 17 km
Matsumoto MMJ 666 Civ. Paved Yes 6500 48 km

Ports

Name LOCODE Country Distance
Himekawa Japan 51 km
Toyahashi Japan 67 km
Naoetsu JPNAO Japan 68 km

Dams

Reservoir Dam Name River Year Distance
Okususobana Okususobana Susobanagawa 1979 16 km

More information

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