M 4.6 in Japan on 26 Mar 2024 21:06 UTC

Hazard models

Rapid Impact
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: 40.4 Km
Lat/Lon: 35.5045 , 140.4575
Event Date: 26 Mar 2024 21:06 UTC
27 Mar 2024 06:06 Local
Exposed Population:
18.7 million in MMI III
Source: NEIC us7000m85k
Inserted at: 26 Mar 2024 21:33 UTC
INFORM Coping capacity of the alert score
1.5 (Japan)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Rapid Impact)		 GDACS score
NEIC 0 0
us7000m85k Scaled population (vector) 0  
  C1 rapid impact 0  
  C2 rapid impact 0  
  Country Vulnerability 0  
  INFORM_normalised 0  
Maximum expected impact using different data sources.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1561294 0 26 Mar 2024 21:06 4.6M, 40.4km 3.26 18.7 million (in 100km) 00:27 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 578,275) . The nearest places are Katakai, Togane, Hasunuma, Naruto, Oami, Mobara, Yokoshiba, Ichinomiya, Chonan, Tako, and Mito.

Radius Population
100 km 34 million people
75 km 16.8 million people
50 km 3.9 million people
20 km 400000 people
10 km 83000 people
5 km 20000 people
2 km <1000 people

Affected Provinces

Region Province Country Population
Kanto Japan 580000 people

Affected populated places

Name Region Province Country City class Population Distance
Katakai Chiba Japan City - 2 km
Togane Chiba Japan Village 55000 people 9 km
Hasunuma Chiba Japan Village - 10 km
Naruto Chiba Japan City 22000 people 12 km
Oami Chiba Japan Village - 13 km
Mobara Chiba Japan City 96000 people 17 km
Yokoshiba Chiba Japan Village - 17 km
Ichinomiya Chiba Japan Village - 17 km
Chonan Chiba Japan Village - 24 km
Tako Chiba Japan City - 26 km
Narita Chiba Japan City 100000 people 27 km
Ohara Chiba Japan City 20000 people 29 km
Asahi Yokaichiba Chiba Japan Village - 30 km
Ushiku Chiba Japan Village - 30 km
Sakura Chiba Japan City 180000 people 31 km
Chiba Chiba Japan Major city 920000 people 32 km
Goi Chiba Japan Village - 33 km
Ino Chiba Japan Village - 35 km
Chiba-nyutaun Chiba Japan Village - 38 km
Anegasaki Chiba Japan Village - 39 km
Namegawa Chiba Japan Village - 41 km
Katsuura Chiba Japan Village 22000 people 41 km
Omigawa Chiba Japan City 25000 people 41 km
Kururi Chiba Japan Village - 41 km
Choshi Chiba Japan City 84000 people 42 km
Ryugasaki Chiba Japan Village 85000 people 42 km
Tokawacho Chiba Japan Village - 42 km
Inuwaka Chiba Japan Village - 42 km
Yatabe Ibaraki Japan Village - 44 km
Kansaki Chiba Japan Village - 44 km
Fujioayashi Chiba Japan Village - 44 km
Okunoya Ibaraki Japan Village - 47 km
Omori Chiba Japan Village - 47 km
Funabashi Chiba Japan City 560000 people 48 km
Fukawa Ibaraki Japan Village - 48 km
Idako Ibaraki Japan Village - 49 km
Kisarazu Chiba Japan City 120000 people 49 km
Kamagaya Chiba Japan City 110000 people 49 km
Koda Ibaraki Japan Village - 50 km
Ryugaski Ibaraki Japan Village - 51 km
Edosaki Ibaraki Japan Village 21000 people 51 km
Ushibori Ibaraki Japan Village - 52 km
Obunatsu Ibaraki Japan Village - 53 km
Kashima Ibaraki Japan Village 65000 people 53 km
Itako Ibaraki Japan Village 25000 people 53 km
Kyuchu Ibaraki Japan Village - 54 km
Kamogawa Chiba Japan Village 29000 people 54 km
Ichikawa Chiba Japan City 460000 people 54 km
Aso Ibaraki Japan Village - 56 km
Abiko Chiba Japan City 130000 people 56 km
Oyama Ibaraki Japan Village - 56 km
Nekoya Ibaraki Japan Village - 57 km
Kimitsu Chiba Japan Village 92000 people 57 km
Matsudo Chiba Japan City 460000 people 57 km
Fujishiro Ibaraki Japan Village 33000 people 58 km
Negoya Ibaraki Japan Village - 58 km
Yaida Ibaraki Japan Village - 59 km
Kihara Ibaraki Japan Village - 59 km
Ushiku Ibaraki Japan Village 79000 people 59 km
Aonuma Ibaraki Japan Village - 59 km
Oshita Ibaraki Japan Village - 60 km
Koya Ibaraki Japan Village - 60 km
Tokyo Tokyo Japan Capital 8.1 million people 60 km
Jikkoku Ibaraki Japan Village - 60 km
Minato Chiba Japan Village - 60 km
Narage Ibaraki Japan Village - 61 km
Omi Ibaraki Japan Village - 61 km
Wakaguri Ibaraki Japan Village - 61 km
Kobata Chiba Japan Village - 61 km
Kubo Ibaraki Japan Village - 61 km
Inoue Ibaraki Japan Village - 61 km
Futtso Chiba Japan Village - 62 km
Aotsuka Ibaraki Japan Village - 62 km
Yoshikawa Ibaraki Japan Village - 62 km
Yamada Ibaraki Japan Village - 63 km
Ikku Ibaraki Japan Village - 63 km
Aruga Ibaraki Japan Village - 63 km
Hamatsuga Ibaraki Japan Village - 63 km
Obata Ibaraki Japan Village - 63 km
Sakihama Ibaraki Japan Village - 64 km
Fuda Ibaraki Japan Village - 64 km
Arakawa-Oki Ibaraki Japan Village - 64 km
Wada Chiba Japan Village - 65 km
Owada Ibaraki Japan Village - 65 km
Obari Ibaraki Japan Village - 65 km
Hinosawa Ibaraki Japan Village - 65 km
Kofunatsu Ibaraki Japan Village - 66 km
Taiyo Ibaraki Japan Village - 66 km
Kyochikama Ibaraki Japan Village - 67 km
Kashiwazaki Ibaraki Japan Village - 67 km
Yatabe Ibaraki Japan Village - 68 km
Owana Ibaraki Japan Village - 68 km
Golanda Tokyo Japan Village - 68 km
Kawasaki Kanagawa Japan Major city 1.3 million people 69 km
Kami-Naganuma Ibaraki Japan Village - 69 km
Muyokama Ibaraki Japan Village - 69 km
Shishikura Ibaraki Japan Village - 69 km
Takata Ibaraki Japan Village - 69 km
Yoshikawa Saitama Japan Village 60000 people 70 km
Yokohama Kanagawa Japan Major city 3.6 million people 76 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 30 km
Shimoshizu 30 0 32 km
Ryugasaki South 2 0 45 km
Ryugasaki 2 0 49 km
Kisarazu 3 Mil. Paved Yes 6000 51 km
Shimofusa 30 Civ. Paved Yes 7300 52 km
Tokyo Haneda International HND 7 Civ. Paved Yes 9800 62 km
26 0 64 km
Yokohama YOK unknown 0 75 km
Hyakuri 32 Mil. Paved Yes 8800 75 km
Tateyama 3 0 81 km
Chiba-ken 19 0 81 km
Chofu 41 Civ. Paved No 3200 86 km
Atsugi NJA 62 Mil. Paved Yes 7900 92 km
Katsner AAF 109 Civ. Paved No 1900 96 km
Tachikawa 95 0 98 km
Honda 12 0 100 km

Ports

Name LOCODE Country Distance
Goi JPGOI Japan 32 km
Chiba JPCHB Japan 33 km
Anegasaki JPANE Japan 34 km
Choshi JPCHO Japan 42 km
Katsuura Ko Japan 44 km
Katunan Ko Japan 47 km
Kashima JPKSM Japan 49 km
Kisarazu JPKZU Japan 50 km
Ogasawara JPOGA Japan 63 km
Kawasaki JPKWS Japan 63 km
Tokyo JPTYO Japan 67 km
Yokohama JPYOK Japan 75 km
Neghisi JPNGI Japan 76 km
Kurihama JPKRH Japan 77 km
Yokosuka JPYOS Japan 77 km
Tateyama JPTTY Japan 79 km

Dams

Reservoir Dam Name River Year Distance
Yamakura Yamakura Yamakuragawa 1964 30 km
Takatakiko Takataki Yorogawa 1990 33 km
Kameyamako Kameyama Obitsugawa 1980 46 km
Kasumigaura Kasumigaura-Kaihatsu Tonegawa 1995 51 km
Kori Kori Korigawa 1972 55 km
Sakuma Sakuma Okuzuregawa 1990 66 km
Miyukiko Gongendochosetsuchi Nakagawa 1991 95 km
Tamako Murayamashimo Tamagawa 2008 97 km
Tamako Murayamakami Tamagawa 1924 99 km
Sayamako Yamaguchi Tamagawa 2002 99 km

Nuclear power plants

Site Type Name Country
Site-Ōarai Research reactor HTTR Japan

More information

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