M 4.6 in Japan from 17 Feb 2020 03:40 UTC to 03:40

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: 35 Km
Lat/Lon: 35.906 , 140.3123
Event Date: 17 Feb 2020 03:40 UTC
17 Feb 2020 12:40 Local
Exposed Population:
38230000 people within 100km
Source: NEIC us70007rmf
Inserted at: 17 Feb 2020 04:10 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 0.1 0.1
us70007rmf Scaled population (vector) 7.54  
  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
1296601 0.1 17 Feb 2020 03:40 4.6M, 35km N/A 38.2 million (in 100km) 00:29 NEIC
1296613 0.1 17 Feb 2020 03:40 4.6M, 35km N/A 39.2 million (in 100km) 02:10 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 Edosaki, Namegawa, Koda, Kansaki, Ryugasaki, Ryugaski, Oyama, Kihara, Yaida, Ino, and Yokohama.

Radius Population
100 km 38.2 million people
75 km 25.5 million people
50 km 10 million people
20 km 710000 people
10 km 100000 people
5 km 20000 people
2 km 3600 people

Affected Provinces

Region Province Country Population
Kanto Japan 38.5 million people

Affected populated places

Name Region Province Country City class Population Distance
Edosaki Ibaraki Japan Village 21000 people 5 km
Namegawa Chiba Japan Village - 6 km
Koda Ibaraki Japan Village - 8 km
Kansaki Chiba Japan Village - 8 km
Ryugasaki Chiba Japan Village 85000 people 9 km
Ryugaski Ibaraki Japan Village - 10 km
Oyama Ibaraki Japan Village - 12 km
Kihara Ibaraki Japan Village - 13 km
Yaida Ibaraki Japan Village - 13 km
Ino Chiba Japan Village - 13 km
Fukawa Ibaraki Japan Village - 15 km
Wakaguri Ibaraki Japan Village - 15 km
Jikkoku Ibaraki Japan Village - 16 km
Ikku Ibaraki Japan Village - 17 km
Ushiku Ibaraki Japan Village 79000 people 17 km
Sakihama Ibaraki Japan Village - 18 km
Aruga Ibaraki Japan Village - 18 km
Itako Ibaraki Japan Village 25000 people 18 km
Chiba-nyutaun Chiba Japan Village - 18 km
Aso Ibaraki Japan Village - 19 km
Narita Chiba Japan City 100000 people 19 km
Omori Chiba Japan Village - 19 km
Arakawa-Oki Ibaraki Japan Village - 20 km
Owada Ibaraki Japan Village - 20 km
Oshita Ibaraki Japan Village - 20 km
Fujishiro Ibaraki Japan Village 33000 people 20 km
Inoue Ibaraki Japan Village - 20 km
Kubo Ibaraki Japan Village - 20 km
Idako Ibaraki Japan Village - 22 km
Kashiwazaki Ibaraki Japan Village - 22 km
Sakura Chiba Japan City 180000 people 22 km
Hinosawa Ibaraki Japan Village - 23 km
Ushibori Ibaraki Japan Village - 23 km
Aonuma Ibaraki Japan Village - 23 km
Nekoya Ibaraki Japan Village - 24 km
Shishikura Ibaraki Japan Village - 24 km
Tako Chiba Japan City - 24 km
Iioka Ibaraki Japan Village - 24 km
Obata Ibaraki Japan Village - 25 km
Abiko Chiba Japan City 130000 people 25 km
Yatabe Ibaraki Japan Village - 25 km
Negoya Ibaraki Japan Village - 25 km
Nakanuki Ibaraki Japan Village - 26 km
Kami-Hirooka Ibaraki Japan Village - 26 km
Yamada Ibaraki Japan Village - 26 km
Owana Ibaraki Japan Village - 27 km
Yoshikawa Ibaraki Japan Village - 27 km
Sakura Ibaraki Japan Village - 27 km
Hangu Ibaraki Japan Village - 27 km
Obari Ibaraki Japan Village - 27 km
Kofunatsu Ibaraki Japan Village - 27 km
Omigawa Chiba Japan City 25000 people 28 km
Kai-Tamari Ibaraki Japan Village - 28 km
Fujisawa Ibaraki Japan Village - 28 km
Obunatsu Ibaraki Japan Village - 29 km
Narage Ibaraki Japan Village - 29 km
Tsuchida Ibaraki Japan Village - 29 km
Fuda Ibaraki Japan Village - 29 km
Kami-Naganuma Ibaraki Japan Village - 29 km
Kamiyama Ibaraki Japan Village - 29 km
Kyuchu Ibaraki Japan Village - 30 km
Tamatsukuri Ibaraki Japan Village - 30 km
Kashima Ibaraki Japan Village 65000 people 30 km
Ogawa Ibaraki Japan Village - 30 km
Hongo Ibaraki Japan Village - 30 km
Omi Ibaraki Japan Village - 30 km
Sawabe Ibaraki Japan Village - 30 km
Takata Ibaraki Japan Village - 31 km
Tonouchi Ibaraki Japan Village - 31 km
Taiyo Ibaraki Japan Village - 31 km
Ishioka Ibaraki Japan Village 52000 people 31 km
Kamagaya Chiba Japan City 110000 people 31 km
Yokoshiba Chiba Japan Village - 32 km
Miyata Ibaraki Japan Village - 32 km
Shimana Ibaraki Japan Village - 32 km
Naka-Shizuku Ibaraki Japan Village - 32 km
Ozone Ibaraki Japan Village - 32 km
Hamatsuga Ibaraki Japan Village - 33 km
Aotsuka Ibaraki Japan Village - 33 km
Koya Ibaraki Japan Village - 33 km
Oda Ibaraki Japan Village - 33 km
Kyochikama Ibaraki Japan Village - 34 km
Okunoya Ibaraki Japan Village - 34 km
Torinosu Ibaraki Japan Village - 34 km
Sanga Ibaraki Japan Village - 34 km
Iina Ibaraki Japan Village - 34 km
Naruto Chiba Japan City 22000 people 34 km
Takehara Ibaraki Japan Village - 34 km
Muyokama Ibaraki Japan Village - 35 km
Goka Ibaraki Japan Village - 35 km
Kamigo Ibaraki Japan Village - 35 km
Ishiyatsudo Ibaraki Japan Village - 35 km
Busshoji Ibaraki Japan Village - 35 km
Dainigorisawa Ibaraki Japan Village - 36 km
Hojo Ibaraki Japan Village - 36 km
Momiji Ibaraki Japan Village - 36 km
Kawamata Ibaraki Japan Village - 36 km
Ambo Ibaraki Japan Village - 37 km
Katakura Ibaraki Japan Village - 37 km
Otake Ibaraki Japan Village - 37 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
Ryugasaki 2 0 6 km
Ryugasaki South 2 0 8 km
Tokyo Narita International NRT 42 Civ. Paved Yes 13100 17 km
26 0 18 km
Shimofusa 30 Civ. Paved Yes 7300 30 km
Shimoshizu 30 0 31 km
Hyakuri 32 Mil. Paved Yes 8800 32 km
Chiba-ken 19 0 47 km
Tokyo Haneda International HND 7 Civ. Paved Yes 9800 62 km
Kisarazu 3 Mil. Paved Yes 6000 67 km
Honda 12 0 72 km
Suzumenomiya 82 0 75 km
Chofu 41 Civ. Paved No 3200 76 km
Utsunomiya QUT 102 Civ. Paved Yes 5500 78 km
Yokohama YOK unknown 0 78 km
Iruma 91 Mil. Paved Yes 6500 82 km
Onishi 20 0 83 km
Tachikawa 95 0 86 km
Yokota AFB OKO 139 Mil. Paved Yes 11000 89 km
Shimo Kolzumi 30 0 92 km
Atsugi NJA 62 Mil. Paved Yes 7900 93 km
Katsner AAF 109 Civ. Paved No 1900 94 km

Ports

Name LOCODE Country Distance
Kashima JPKSM Japan 35 km
Anegasaki JPANE Japan 38 km
Chiba JPCHB Japan 39 km
Katunan Ko Japan 39 km
Goi JPGOI Japan 46 km
Choshi JPCHO Japan 50 km
Ogasawara JPOGA Japan 53 km
Tokyo JPTYO Japan 54 km
Kawasaki JPKWS Japan 65 km
Kisarazu JPKZU Japan 68 km
Hitachi JPHTC Japan 71 km
Yokohama JPYOK Japan 79 km
Neghisi JPNGI Japan 83 km
Katsuura Ko Japan 85 km
Yokosuka JPYOS Japan 91 km
Kurihama JPKRH Japan 96 km

Dams

Reservoir Dam Name River Year Distance
Kasumigaura Kasumigaura-Kaihatsu Tonegawa 1995 19 km
Yamakura Yamakura Yamakuragawa 1964 49 km
Jajanboike Kozogawa Kozogawa 1985 58 km
Miyukiko Gongendochosetsuchi Nakagawa 1991 59 km
Takatakiko Takataki Yorogawa 1990 63 km
Yanakako Wataraseyusuichi Watarasegawa 1989 66 km
Kori Kori Korigawa 1972 77 km
Kameyamako Kameyama Obitsugawa 1980 78 km
Tamako Murayamashimo Tamagawa 2008 81 km
Sayamako Yamaguchi Tamagawa 2002 82 km
Tamako Murayamakami Tamagawa 1924 83 km
Miyazawako Miyazawatameike Koazegawa 1941 89 km
Sakuma Sakuma Okuzuregawa 1990 95 km
Tsukuiko Shiroyama Sagamigawa 1964 100 km

Nuclear plants

Name Country Reactors Distance
TOKAI JAPAN 3 67 km

More information

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