M 4.8 in Japan on 17 Apr 2017 17:39 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: 4.8M
Depth: 74.56 Km
Lat/Lon: 34.5751 , 140.3916
Event Date: 17 Apr 2017 17:39 UTC
18 Apr 2017 02:39 Local
Exposed Population:
510000 people within 100km
Source: NEIC us10008idv
Inserted at: 17 Apr 2017 18:00 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 -0.9 -0.9
us10008idv Scaled population (vector) 0  
  C1 earthquake 1  
  C2 earthquake 0  
  Country Vulnerability 0  
  INFORM_normalised 1  
Maximum expected impact using different data sources.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1164329 -0.9 17 Apr 2017 17:39 4.8M, 74.56km N/A 510 thousand (in 100km) 00:21 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 Kanto (population 38,543,000) . The nearest places are Shiramazu, Okawa, Chikura, Hara, Shirako, Seto, Hongo, Wada, Kubo, Funagasaku, and Kembutsu.

Radius Population
100 km 510000 people
75 km 140000 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
Kanto Japan 38.5 million people
Chubu Japan 5.2 million people
Tohoku Japan 10 million people
Kinki Japan 22.2 million people

Affected populated places

Name Region Province Country City class Population Distance
Shiramazu Chiba Japan Village - 56 km
Okawa Chiba Japan Village - 56 km
Chikura Chiba Japan City - 57 km
Hara Chiba Japan Village - 57 km
Shirako Chiba Japan Village - 59 km
Seto Chiba Japan Village - 60 km
Hongo Chiba Japan Village - 60 km
Wada Chiba Japan Village - 61 km
Kubo Chiba Japan Village - 61 km
Funagasaku Chiba Japan Village - 61 km
Komatsu Chiba Japan Village - 61 km
Kanamaru Chiba Japan Village - 62 km
Nemoto Chiba Japan Village - 62 km
Kamogawa Chiba Japan Village 29000 people 64 km
Katsuura Chiba Japan Village 22000 people 64 km
Olo Chiba Japan Village - 64 km
Fugiwara Chiba Japan Village - 65 km
Kokubu Chiba Japan Village - 65 km
Tateyama Chiba Japan City 49000 people 67 km
Ko Chiba Japan Village - 68 km
Konuma Chiba Japan Village - 69 km
Kembutsu Chiba Japan Village - 69 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
Tateyama 3 0 68 km

Ports

Name LOCODE Country Distance
Katsuura Ko Japan 62 km
Tateyama JPTTY Japan 66 km

Dams

Reservoir Dam Name River Year Distance
Sakuma Sakuma Okuzuregawa 1990 75 km
Kameyamako Kameyama Obitsugawa 1980 77 km
Takatakiko Takataki Yorogawa 1990 89 km
Kori Kori Korigawa 1972 91 km

More information

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