M 4.6 in Japan on 28 Jul 2020 20:33 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: 35.76 Km
Lat/Lon: 35.9541 , 140.6008
Event Date: 28 Jul 2020 20:33 UTC
29 Jul 2020 05:33 Local
Exposed Population:
26280000 people within 100km
Source: NEIC us6000b5lm
Inserted at: 28 Jul 2020 21:40 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
us6000b5lm Scaled population (vector) 7.13  
  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
1323807 0 28 Jul 2020 20:33 4.6M, 35.76km N/A 26.3 million (in 100km) 01:06 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 Obunatsu, Kyuchu, Kashima, Ushibori, Idako, Koya, Nekoya, Negoya, Omi, Narage, and Kawasaki.

Radius Population
100 km 26.3 million people
75 km 10.8 million people
50 km 2.6 million people
20 km 320000 people
10 km 140000 people
5 km 50000 people
2 km 5100 people

Affected Provinces

Region Province Country Population
Kanto Japan 38.5 million people

Affected populated places

Name Region Province Country City class Population Distance
Obunatsu Ibaraki Japan Village - 2 km
Kyuchu Ibaraki Japan Village - 3 km
Kashima Ibaraki Japan Village 65000 people 3 km
Ushibori Ibaraki Japan Village - 4 km
Idako Ibaraki Japan Village - 5 km
Koya Ibaraki Japan Village - 8 km
Nekoya Ibaraki Japan Village - 9 km
Negoya Ibaraki Japan Village - 9 km
Omi Ibaraki Japan Village - 9 km
Narage Ibaraki Japan Village - 10 km
Aotsuka Ibaraki Japan Village - 11 km
Itako Ibaraki Japan Village 25000 people 11 km
Omigawa Chiba Japan City 25000 people 11 km
Okunoya Ibaraki Japan Village - 11 km
Aonuma Ibaraki Japan Village - 12 km
Hamatsuga Ibaraki Japan Village - 12 km
Aso Ibaraki Japan Village - 13 km
Yoshikawa Ibaraki Japan Village - 13 km
Yamada Ibaraki Japan Village - 14 km
Fuda Ibaraki Japan Village - 14 km
Kyochikama Ibaraki Japan Village - 15 km
Taiyo Ibaraki Japan Village - 16 km
Oshita Ibaraki Japan Village - 16 km
Obata Ibaraki Japan Village - 17 km
Kofunatsu Ibaraki Japan Village - 18 km
Kubo Ibaraki Japan Village - 18 km
Muyokama Ibaraki Japan Village - 18 km
Inoue Ibaraki Japan Village - 18 km
Kansaki Chiba Japan Village - 19 km
Koda Ibaraki Japan Village - 19 km
Dainigorisawa Ibaraki Japan Village - 20 km
Takata Ibaraki Japan Village - 20 km
Oyama Ibaraki Japan Village - 22 km
Owana Ibaraki Japan Village - 22 km
Otake Ibaraki Japan Village - 23 km
Ino Chiba Japan Village - 23 km
Yatabe Ibaraki Japan Village - 24 km
Aruga Ibaraki Japan Village - 25 km
Iina Ibaraki Japan Village - 25 km
Edosaki Ibaraki Japan Village 21000 people 25 km
Yaida Ibaraki Japan Village - 26 km
Namegawa Chiba Japan Village - 26 km
Kamiyama Ibaraki Japan Village - 26 km
Asahi Yokaichiba Chiba Japan Village - 26 km
Hokota Ibaraki Japan Village 28000 people 26 km
Ambo Ibaraki Japan Village - 27 km
Tako Chiba Japan City - 27 km
Katsuori Ibaraki Japan Village - 27 km
Kashiwazaki Ibaraki Japan Village - 27 km
Owada Ibaraki Japan Village - 28 km
Torinosu Ibaraki Japan Village - 28 km
Kihara Ibaraki Japan Village - 28 km
Hangu Ibaraki Japan Village - 29 km
Noda Ibaraki Japan Village - 29 km
Ishiyatsudo Ibaraki Japan Village - 29 km
Sakihama Ibaraki Japan Village - 30 km
Tonouchi Ibaraki Japan Village - 30 km
Shishikura Ibaraki Japan Village - 31 km
Choshi Chiba Japan City 84000 people 31 km
Narita Chiba Japan City 100000 people 31 km
Asahi Ibaraki Japan Village - 32 km
Funaki Ibaraki Japan Village - 32 km
Tamatsukuri Ibaraki Japan Village - 32 km
Ogawa Ibaraki Japan Village - 33 km
Momiji Ibaraki Japan Village - 33 km
Kamigama Ibaraki Japan Village - 33 km
Iioka Ibaraki Japan Village - 33 km
Kai-Tamari Ibaraki Japan Village - 33 km
Ryugasaki Chiba Japan Village 85000 people 34 km
Yokoshiba Chiba Japan Village - 35 km
Miyata Ibaraki Japan Village - 35 km
Nagasu Ibaraki Japan Village - 35 km
Oyagaw Ibaraki Japan Village - 35 km
Torihada Ibaraki Japan Village - 36 km
Sanga Ibaraki Japan Village - 36 km
Tokawacho Chiba Japan Village - 37 km
Ebisawa Ibaraki Japan Village - 37 km
Inuwaka Chiba Japan Village - 37 km
Ryugaski Ibaraki Japan Village - 37 km
Wakaguri Ibaraki Japan Village - 37 km
Natsumi Ibaraki Japan Village - 37 km
Ikku Ibaraki Japan Village - 38 km
Jikkoku Ibaraki Japan Village - 38 km
Akiba Ibaraki Japan Village - 38 km
Katakura Ibaraki Japan Village - 38 km
Ishioka Ibaraki Japan Village 52000 people 39 km
Takehara Ibaraki Japan Village - 39 km
Tsuchida Ibaraki Japan Village - 40 km
Nakanuki Ibaraki Japan Village - 40 km
Arakawa-Oki Ibaraki Japan Village - 40 km
Mazunochi Ibaraki Japan Village - 41 km
Morido Ibaraki Japan Village - 41 km
Kotsuru Ibaraki Japan Village - 41 km
Hasunuma Chiba Japan Village - 41 km
Okunoya Ibaraki Japan Village - 41 km
Fukawa Ibaraki Japan Village - 42 km
Chiba-nyutaun Chiba Japan Village - 42 km
Naka-Shizuku Ibaraki Japan Village - 42 km
Sakura Chiba Japan City 180000 people 42 km
Ushiku Ibaraki Japan Village 79000 people 42 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
Tokyo Narita International NRT 42 Civ. Paved Yes 13100 29 km
Hyakuri 32 Mil. Paved Yes 8800 30 km
Ryugasaki 2 0 33 km
Ryugasaki South 2 0 34 km
26 0 38 km
Shimoshizu 30 0 52 km
Shimofusa 30 Civ. Paved Yes 7300 56 km
Chiba-ken 19 0 72 km
Tokyo Haneda International HND 7 Civ. Paved Yes 9800 86 km
Kisarazu 3 Mil. Paved Yes 6000 88 km
Suzumenomiya 82 0 88 km
Utsunomiya QUT 102 Civ. Paved Yes 5500 90 km
Honda 12 0 97 km

Ports

Name LOCODE Country Distance
Kashima JPKSM Japan 10 km
Choshi JPCHO Japan 32 km
Chiba JPCHB Japan 59 km
Anegasaki JPANE Japan 59 km
Hitachi JPHTC Japan 60 km
Katunan Ko Japan 64 km
Goi JPGOI Japan 65 km
Ogasawara JPOGA Japan 79 km
Tokyo JPTYO Japan 81 km
Kisarazu JPKZU Japan 88 km
Kawasaki JPKWS Japan 89 km
Katsuura Ko Japan 95 km

Dams

Reservoir Dam Name River Year Distance
Kasumigaura Kasumigaura-Kaihatsu Tonegawa 1995 8 km
Jajanboike Kozogawa Kozogawa 1985 55 km
Yamakura Yamakura Yamakuragawa 1964 67 km
Takatakiko Takataki Yorogawa 1990 78 km
Miyukiko Gongendochosetsuchi Nakagawa 1991 82 km
Yanakako Wataraseyusuichi Watarasegawa 1989 87 km
Kameyamako Kameyama Obitsugawa 1980 93 km
Kori Kori Korigawa 1972 96 km
Mizunuma Mizunuma Hanazonokawa 1966 100 km

Nuclear plants

Name Country Reactors Distance
TOKAI JAPAN 3 56 km

More information

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