M 4.6 in Japan on 21 Oct 2017 18:38 UTC
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: 10 Km
Lat/Lon: 44.0427 , 140.7736
Event Date: 21 Oct 2017 18:38 UTC
22 Oct 2017 03:38 Local
Exposed Population:
150000 people within 100km
Source: NEIC us1000avah
Inserted at: 21 Oct 2017 20:00 UTC
INFORM Coping capacity of the alert score
1.5 (Japan)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
NEIC 0 0
us1000avah Scaled population (vector) 4.18  
  C1 earthquake 0.73  
  C2 earthquake -0.22  
  Country Vulnerability -0.71  
  INFORM_normalised 0.57  
Maximum expected impact using different data sources.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1184755 0 21 Oct 2017 18:38 4.6M, 10km N/A 150 thousand (in 100km) 01:21 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 Hokkaido (population 5,808,054) . The nearest places are Kuzure, Ofuyu, Kurosaki, Mashike, Banyamai, Kawashimo, Nishiura, and Kotan.

Radius Population
100 km 150000 people
75 km <1000 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
Hokkaido Japan 5.8 million people
Sakhalinskaya oblast' Russian Federation 730000 people
Tohoku Japan 10 million people
Primorskiy kray Russian Federation -
Khabarovskiy kray Russian Federation -

Affected populated places

Name Region Province Country City class Population Distance
Kuzure Hokkaido Japan Village - 56 km
Ofuyu Hokkaido Japan Village - 57 km
Kurosaki Hokkaido Japan Village - 59 km
Mashike Hokkaido Japan Village - 62 km
Banyamai Hokkaido Japan Village - 62 km
Kawashimo Hokkaido Japan Village - 64 km
Nishiura Hokkaido Japan Village - 66 km
Kotan Hokkaido Japan Village - 68 km

see full list

Critical infrastructure

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

Ports

Name LOCODE Country Distance
Mashike Japan 65 km
Rumoi JPRMI Japan 71 km
Hamamasu Japan 71 km
Yoichi Japan 90 km
Otaru JPOTR Japan 95 km

More information

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