M 4.6 in Japan on 17 Feb 2020 03:40 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: 35 Km
Lat/Lon: 35.9175 , 140.2234
Event Date: 17 Feb 2020 03:40 UTC
17 Feb 2020 12:40 Local
Exposed Population:
39190000 people within 100km
Source: NEIC us70007rmf
Inserted at: 17 Feb 2020 05:51 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) 7.64  
  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 Ryugaski, Ryugasaki, Fukawa, Edosaki, Ushiku, Jikkoku, Wakaguri, Fujishiro, Namegawa, Ikku, and Yokohama.

Radius Population
100 km 39.2 million people
75 km 29.1 million people
50 km 13.1 million people
20 km 1 million people
10 km 220000 people
5 km 54000 people
2 km 6400 people

Affected Provinces

Region Province Country Population
Kanto Japan 38.5 million people

Affected populated places

Name Region Province Country City class Population Distance
Ryugaski Ibaraki Japan Village - 3 km
Ryugasaki Chiba Japan Village 85000 people 9 km
Fukawa Ibaraki Japan Village - 9 km
Edosaki Ibaraki Japan Village 21000 people 9 km
Ushiku Ibaraki Japan Village 79000 people 10 km
Jikkoku Ibaraki Japan Village - 10 km
Wakaguri Ibaraki Japan Village - 10 km
Fujishiro Ibaraki Japan Village 33000 people 12 km
Namegawa Chiba Japan Village - 12 km
Ikku Ibaraki Japan Village - 13 km
Kihara Ibaraki Japan Village - 13 km
Omori Chiba Japan Village - 14 km
Arakawa-Oki Ibaraki Japan Village - 14 km
Yaida Ibaraki Japan Village - 15 km
Koda Ibaraki Japan Village - 15 km
Hinosawa Ibaraki Japan Village - 16 km
Oyama Ibaraki Japan Village - 16 km
Chiba-nyutaun Chiba Japan Village - 16 km
Kansaki Chiba Japan Village - 17 km
Sakihama Ibaraki Japan Village - 17 km
Abiko Chiba Japan City 130000 people 18 km
Yatabe Ibaraki Japan Village - 18 km
Obari Ibaraki Japan Village - 19 km
Kami-Hirooka Ibaraki Japan Village - 20 km
Ino Chiba Japan Village - 20 km
Aruga Ibaraki Japan Village - 20 km
Owada Ibaraki Japan Village - 21 km
Kami-Naganuma Ibaraki Japan Village - 21 km
Sakura Chiba Japan City 180000 people 22 km
Sakura Ibaraki Japan Village - 22 km
Nakanuki Ibaraki Japan Village - 23 km
Kashiwazaki Ibaraki Japan Village - 23 km
Fujisawa Ibaraki Japan Village - 24 km
Narita Chiba Japan City 100000 people 24 km
Iioka Ibaraki Japan Village - 24 km
Shishikura Ibaraki Japan Village - 24 km
Shimana Ibaraki Japan Village - 25 km
Aso Ibaraki Japan Village - 25 km
Inoue Ibaraki Japan Village - 25 km
Itako Ibaraki Japan Village 25000 people 25 km
Kubo Ibaraki Japan Village - 25 km
Oshita Ibaraki Japan Village - 25 km
Kamagaya Chiba Japan City 110000 people 26 km
Sawabe Ibaraki Japan Village - 26 km
Hongo Ibaraki Japan Village - 27 km
Ozone Ibaraki Japan Village - 27 km
Tsuchida Ibaraki Japan Village - 27 km
Goka Ibaraki Japan Village - 28 km
Oda Ibaraki Japan Village - 28 km
Kamigo Ibaraki Japan Village - 28 km
Kai-Tamari Ibaraki Japan Village - 28 km
Hangu Ibaraki Japan Village - 29 km
Idako Ibaraki Japan Village - 29 km
Obata Ibaraki Japan Village - 30 km
Aonuma Ibaraki Japan Village - 30 km
Naka-Shizuku Ibaraki Japan Village - 30 km
Tako Chiba Japan City - 30 km
Ishioka Ibaraki Japan Village 52000 people 30 km
Nekoya Ibaraki Japan Village - 30 km
Ushibori Ibaraki Japan Village - 30 km
Owana Ibaraki Japan Village - 30 km
Tamatsukuri Ibaraki Japan Village - 31 km
Ogawa Ibaraki Japan Village - 31 km
Hojo Ibaraki Japan Village - 31 km
Yoshinuma Ibaraki Japan Village - 31 km
Busshoji Ibaraki Japan Village - 32 km
Noda Chiba Japan City 120000 people 32 km
Negoya Ibaraki Japan Village - 32 km
Yamada Ibaraki Japan Village - 32 km
Matsudo Chiba Japan City 460000 people 32 km
Kofunatsu Ibaraki Japan Village - 32 km
Miyata Ibaraki Japan Village - 32 km
Kamiyama Ibaraki Japan Village - 32 km
Funabashi Chiba Japan City 560000 people 32 km
Oyama Ibaraki Japan Village - 33 km
Ishige Ibaraki Japan Village 25000 people 33 km
Tonouchi Ibaraki Japan Village - 33 km
Yoshikawa Ibaraki Japan Village - 33 km
Matate Ibaraki Japan Village - 33 km
Kawamata Ibaraki Japan Village - 34 km
Tsukuba Ibaraki Japan City 180000 people 34 km
Takehara Ibaraki Japan Village - 34 km
Obata Ibaraki Japan Village - 34 km
Yoshikawa Saitama Japan Village 60000 people 34 km
Sanga Ibaraki Japan Village - 35 km
Horage Ibaraki Japan Village - 35 km
Ichikawa Chiba Japan City 460000 people 35 km
Fuda Ibaraki Japan Village - 35 km
Zodo Ibaraki Japan Village - 35 km
Kutsukake Ibaraki Japan Village - 35 km
Narage Ibaraki Japan Village - 35 km
Takata Ibaraki Japan Village - 36 km
Saheita-Shinden Ibaraki Japan Village - 36 km
Omigawa Chiba Japan City 25000 people 36 km
Takasai Ibaraki Japan Village - 36 km
Kakioka Ibaraki Japan Village - 36 km
Chiba Chiba Japan Major city 920000 people 36 km
Obunatsu Ibaraki Japan Village - 36 km
Torinosu Ibaraki Japan Village - 37 km
Kami-Oshima 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 2 km
Ryugasaki South 2 0 5 km
26 0 14 km
Tokyo Narita International NRT 42 Civ. Paved Yes 13100 22 km
Shimofusa 30 Civ. Paved Yes 7300 23 km
Shimoshizu 30 0 30 km
Hyakuri 32 Mil. Paved Yes 8800 34 km
Chiba-ken 19 0 39 km
Tokyo Haneda International HND 7 Civ. Paved Yes 9800 57 km
Honda 12 0 64 km
Kisarazu 3 Mil. Paved Yes 6000 64 km
Chofu 41 Civ. Paved No 3200 69 km
Suzumenomiya 82 0 70 km
Yokohama YOK unknown 0 73 km
Utsunomiya QUT 102 Civ. Paved Yes 5500 73 km
Iruma 91 Mil. Paved Yes 6500 74 km
Onishi 20 0 75 km
Tachikawa 95 0 78 km
Yokota AFB OKO 139 Mil. Paved Yes 11000 81 km
Shimo Kolzumi 30 0 84 km
Atsugi NJA 62 Mil. Paved Yes 7900 87 km
Katsner AAF 109 Civ. Paved No 1900 87 km

Ports

Name LOCODE Country Distance
Katunan Ko Japan 35 km
Anegasaki JPANE Japan 36 km
Chiba JPCHB Japan 37 km
Kashima JPKSM Japan 43 km
Goi JPGOI Japan 44 km
Ogasawara JPOGA Japan 47 km
Tokyo JPTYO Japan 48 km
Choshi JPCHO Japan 58 km
Kawasaki JPKWS Japan 60 km
Kisarazu JPKZU Japan 65 km
Hitachi JPHTC Japan 74 km
Yokohama JPYOK Japan 74 km
Neghisi JPNGI Japan 78 km
Yokosuka JPYOS Japan 87 km
Katsuura Ko Japan 87 km
Kurihama JPKRH Japan 92 km

Dams

Reservoir Dam Name River Year Distance
Kasumigaura Kasumigaura-Kaihatsu Tonegawa 1995 26 km
Yamakura Yamakura Yamakuragawa 1964 49 km
Miyukiko Gongendochosetsuchi Nakagawa 1991 51 km
Jajanboike Kozogawa Kozogawa 1985 58 km
Yanakako Wataraseyusuichi Watarasegawa 1989 58 km
Takatakiko Takataki Yorogawa 1990 63 km
Tamako Murayamashimo Tamagawa 2008 73 km
Kori Kori Korigawa 1972 75 km
Sayamako Yamaguchi Tamagawa 2002 75 km
Tamako Murayamakami Tamagawa 1924 75 km
Kameyamako Kameyama Obitsugawa 1980 77 km
Miyazawako Miyazawatameike Koazegawa 1941 81 km
Tsukuiko Shiroyama Sagamigawa 1964 93 km
Sakuma Sakuma Okuzuregawa 1990 93 km
Naguriko Arima Arimagawa 1985 95 km
Miyagaseko Miyagase Nakatsugawa 2001 98 km
Sagamiko Sagami Sagamigawa 1947 99 km

Nuclear plants

Name Country Reactors Distance
TOKAI JAPAN 3 70 km

More information

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