M 4.6 in Japan on 21 Aug 2017 22:37 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: 31.35 Km
Lat/Lon: 38.9907 , 142.2816
Event Date: 21 Aug 2017 22:37 UTC
22 Aug 2017 07:37 Local
Exposed Population:
320000 people within 100km
Source: NEIC us2000aafv
Inserted at: 21 Aug 2017 22:59 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
us2000aafv 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
1178167 0 21 Aug 2017 22:37 4.6M, 31.35km N/A 320 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 Tohoku (population 9,984,608) . The nearest places are Sakihama, Oishi, Shirahama, Nonomae, Koishihama, Okubo, Shimo-Horei, Ryori, Urahama, Okkirai, and Natari.

Radius Population
100 km 320000 people
75 km 140000 people
50 km 1600 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
Hokkaido Japan 5.8 million people
Chubu Japan 5.2 million people

Affected populated places

Name Region Province Country City class Population Distance
Sakihama Iwate Japan Village - 38 km
Oishi Iwate Japan Village - 40 km
Shirahama Iwate Japan Village - 41 km
Nonomae Iwate Japan Village - 41 km
Koishihama Iwate Japan Village - 41 km
Okubo Iwate Japan Village - 41 km
Shimo-Horei Iwate Japan Village - 43 km
Ryori Iwate Japan Village - 43 km
Urahama Iwate Japan Village - 43 km
Okkirai Iwate Japan Village - 43 km
Kojirahama Iwate Japan Village - 43 km
Heida Iwate Japan Village - 44 km
Attari Iwate Japan Village - 45 km
Kami-Heida Iwate Japan Village - 45 km
Hongo Iwate Japan Village - 46 km
Nagasaki Iwate Japan Village - 46 km
Kamaishi Iwate Japan City 42000 people 46 km
Tatamiishi Iwate Japan Village - 47 km
Hakozaki Iwate Japan Village - 49 km
Ofunato Iwate Japan Village 37000 people 49 km
Shimo-Funato Iwate Japan Village - 49 km
Kurosaki Iwate Japan Village - 49 km
Hosaura Iwate Japan Village - 49 km
Ryoishi Iwate Japan Village - 49 km
Kogakuchi Iwate Japan Village - 49 km
Tomari Iwate Japan Village - 50 km
Anto Iwate Japan Village - 51 km
Unozumai Iwate Japan Village - 51 km
Sakari Iwate Japan Village - 51 km
Kirikiri Iwate Japan Village - 52 km
Sekizawa Iwate Japan Village - 53 km
Nakasato Iwate Japan Village - 53 km
Koyatori Iwate Japan Village - 54 km
Wakinosawa Iwate Japan Village - 54 km
Hinata Iwate Japan Village - 54 km
Fudaba Iwate Japan Village - 55 km
Kesennuma Miyagi Japan Village 59000 people 55 km
Sakihama Miyagi Japan Village - 55 km
Funakoshi Iwate Japan Village - 55 km
Oura Iwate Japan Village - 56 km
Shuku Miyagi Japan Village - 56 km
Rikuzen-Takata Iwate Japan Village - 56 km
Sukuiso Iwate Japan Village - 56 km
Tadagoe Miyagi Japan Village - 56 km
Koharagi Miyagi Japan Village - 56 km
Otsuchi Iwate Japan Village 16000 people 57 km
Imaizumi Iwate Japan Village - 57 km
Ohashi Iwate Japan Village - 58 km
Uranohama Miyagi Japan Village - 59 km
Nakasone Iwate Japan Village - 59 km
Tsubonosawa Iwate Japan Village - 59 km
Tsurugaura Miyagi Japan Village - 59 km
Oku-Tsuchikura Iwate Japan Village - 60 km
Matsuzaki Miyagi Japan Village - 60 km
Suwa Iwate Japan Village - 60 km
Yamada Iwate Japan Village 20000 people 60 km
Osawa Iwate Japan Village - 60 km
Hashino Iwate Japan Village - 60 km
Sawa Iwate Japan Village - 61 km
Hama Miyagi Japan Village - 61 km
Uchikoshi Iwate Japan Village - 61 km
Yokouchi Iwate Japan Village - 61 km
Nakase Miyagi Japan Village - 62 km
Kutsukake Iwate Japan Village - 62 km
Shimo-Yashiki Iwate Japan Village - 62 km
Setamai Iwate Japan Village - 62 km
Akuao Miyagi Japan Village - 63 km
Yokamachi Iwate Japan Village - 63 km
Oya Miyagi Japan Village - 64 km
Kozawa Iwate Japan Village - 64 km
Ishihama Iwate Japan Village - 65 km
Ohata Iwate Japan Village - 66 km
Unata Iwate Japan Village - 66 km
Kawaguchi Iwate Japan Village - 66 km
Hiraiso Miyagi Japan Village - 67 km
Shizu Iwate Japan Village - 67 km
Dogahana Iwate Japan Village - 68 km
Nakagawara Iwate Japan Village - 69 km
Akabane Iwate Japan Village - 69 km
Natari Miyagi Japan Village - 69 km

see full list

Critical infrastructure

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

Ports

Name LOCODE Country Distance
Kamaishi JPKIS Japan 46 km
Ofunato JPOFT Japan 49 km
Yamada Japan 59 km
Kesennuma Ko Japan 60 km
Miyako JPMYK Japan 77 km

More information

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