M 4.8 in Japan on 31 Oct 2015 14:20 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: 4.8M
Depth: 42.04 Km
Lat/Lon: 35.8562 , 140.7517
Event Date: 31 Oct 2015 14:20 UTC
31 Oct 2015 23:20 Local
Exposed Population:
18950548 people within 100km
Source: NEIC
Inserted at: 31 Oct 2015 15:03 UTC

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
NEIC 0.2 0.2
Scaled population (vector) n.a  
  C1 earthquake n.a  
  C2 earthquake n.a  
  Country Vulnerability n.a  
  INFORM_normalised n.a  
Maximum expected impact using different data sources.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1104285 0.2 31 Oct 2015 14:20 4.8M, 42.04km N/A 19 million (in 100km) 00:42 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 Yatabe, Okunoya, Omigawa, Choshi, Kashima, Kyuchu, Obunatsu, Asahi Yokaichiba, Tokawacho, Inuwaka, and Tokyo.

Radius Population
100 km 18.7 million people
75 km 6.7 million people
50 km 1.2 million people
20 km 330000 people
10 km 65000 people
5 km 19000 people
2 km <1000 people

Affected Provinces

Region Province Country Population
Kanto Japan 38.5 million people

Affected populated places

Name Region Province Country City class Population Distance
Yatabe Ibaraki Japan Village - 7 km
Okunoya Ibaraki Japan Village - 7 km
Omigawa Chiba Japan City 25000 people 13 km
Choshi Chiba Japan City 84000 people 14 km
Kashima Ibaraki Japan Village 65000 people 16 km
Kyuchu Ibaraki Japan Village - 16 km
Obunatsu Ibaraki Japan Village - 17 km
Asahi Yokaichiba Chiba Japan Village - 17 km
Tokawacho Chiba Japan Village - 20 km
Inuwaka Chiba Japan Village - 20 km
Koya Ibaraki Japan Village - 20 km
Idako Ibaraki Japan Village - 20 km
Ushibori Ibaraki Japan Village - 22 km
Aotsuka Ibaraki Japan Village - 24 km
Omi Ibaraki Japan Village - 24 km
Narage Ibaraki Japan Village - 25 km
Hamatsuga Ibaraki Japan Village - 25 km
Negoya Ibaraki Japan Village - 26 km
Nekoya Ibaraki Japan Village - 26 km
Itako Ibaraki Japan Village 25000 people 28 km
Tako Chiba Japan City - 29 km
Aonuma Ibaraki Japan Village - 29 km
Kyochikama Ibaraki Japan Village - 29 km
Yoshikawa Ibaraki Japan Village - 29 km
Aso Ibaraki Japan Village - 30 km
Fuda Ibaraki Japan Village - 30 km
Yamada Ibaraki Japan Village - 31 km
Taiyo Ibaraki Japan Village - 31 km
Ino Chiba Japan Village - 31 km
Kansaki Chiba Japan Village - 32 km
Muyokama Ibaraki Japan Village - 32 km
Yokoshiba Chiba Japan Village - 33 km
Oshita Ibaraki Japan Village - 33 km
Obata Ibaraki Japan Village - 34 km
Dainigorisawa Ibaraki Japan Village - 34 km
Koda Ibaraki Japan Village - 34 km
Kofunatsu Ibaraki Japan Village - 34 km
Kubo Ibaraki Japan Village - 35 km
Inoue Ibaraki Japan Village - 36 km
Narita Chiba Japan City 100000 people 36 km
Takata Ibaraki Japan Village - 36 km
Namegawa Chiba Japan Village - 37 km
Otake Ibaraki Japan Village - 37 km
Hasunuma Chiba Japan Village - 38 km
Oyama Ibaraki Japan Village - 39 km
Owana Ibaraki Japan Village - 39 km
Edosaki Ibaraki Japan Village 21000 people 41 km
Hokota Ibaraki Japan Village 28000 people 41 km
Iina Ibaraki Japan Village - 41 km
Katsuori Ibaraki Japan Village - 41 km
Naruto Chiba Japan City 22000 people 42 km
Ambo Ibaraki Japan Village - 42 km
Yaida Ibaraki Japan Village - 42 km
Aruga Ibaraki Japan Village - 42 km
Kamiyama Ibaraki Japan Village - 43 km
Noda Ibaraki Japan Village - 43 km
Torinosu Ibaraki Japan Village - 44 km
Kashiwazaki Ibaraki Japan Village - 45 km
Kihara Ibaraki Japan Village - 45 km
Ryugasaki Chiba Japan Village 85000 people 45 km
Owada Ibaraki Japan Village - 45 km
Ishiyatsudo Ibaraki Japan Village - 45 km
Hangu Ibaraki Japan Village - 46 km
Katakai Chiba Japan City - 46 km
Asahi Ibaraki Japan Village - 46 km
Kamigama Ibaraki Japan Village - 47 km
Togane Chiba Japan Village 55000 people 47 km
Sakihama Ibaraki Japan Village - 47 km
Tonouchi Ibaraki Japan Village - 47 km
Funaki Ibaraki Japan Village - 48 km
Shishikura Ibaraki Japan Village - 48 km
Sakura Chiba Japan City 180000 people 49 km
Momiji Ibaraki Japan Village - 49 km
Oyagaw Ibaraki Japan Village - 50 km
Tamatsukuri Ibaraki Japan Village - 50 km
Nagasu Ibaraki Japan Village - 50 km
Ogawa Ibaraki Japan Village - 50 km
Iioka Ibaraki Japan Village - 50 km
Ryugaski Ibaraki Japan Village - 50 km
Kai-Tamari Ibaraki Japan Village - 51 km
Natsumi Ibaraki Japan Village - 51 km
Chiba-nyutaun Chiba Japan Village - 51 km
Miyata Ibaraki Japan Village - 52 km
Ebisawa Ibaraki Japan Village - 52 km
Torihada Ibaraki Japan Village - 52 km
Wakaguri Ibaraki Japan Village - 53 km
Sanga Ibaraki Japan Village - 54 km
Jikkoku Ibaraki Japan Village - 54 km
Fukawa Ibaraki Japan Village - 54 km
Ikku Ibaraki Japan Village - 54 km
Akiba Ibaraki Japan Village - 54 km
Oami Chiba Japan Village - 54 km
Katakura Ibaraki Japan Village - 55 km
Morido Ibaraki Japan Village - 55 km
Takehara Ibaraki Japan Village - 56 km
Ishioka Ibaraki Japan Village 52000 people 56 km
Ogushi Ibaraki Japan Village - 56 km
Arakawa-Oki Ibaraki Japan Village - 57 km
Nakanuki Ibaraki Japan Village - 57 km
Kotsuru Ibaraki Japan Village - 57 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 35 km
Ryugasaki 2 0 47 km
Ryugasaki South 2 0 47 km
Hyakuri 32 Mil. Paved Yes 8800 47 km
26 0 54 km
Shimoshizu 30 0 58 km
Shimofusa 30 Civ. Paved Yes 7300 67 km
Chiba-ken 19 0 87 km
Kisarazu 3 Mil. Paved Yes 6000 91 km
Tokyo Haneda International HND 7 Civ. Paved Yes 9800 94 km

Ports

Name LOCODE Country Distance
Kashima JPKSM Japan 7 km
Choshi JPCHO Japan 15 km
Chiba JPCHB Japan 65 km
Anegasaki JPANE Japan 65 km
Goi JPGOI Japan 69 km
Hitachi JPHTC Japan 72 km
Katunan Ko Japan 72 km
Ogasawara JPOGA Japan 89 km
Katsuura Ko Japan 90 km
Tokyo JPTYO Japan 91 km
Kisarazu JPKZU Japan 92 km
Kawasaki JPKWS Japan 97 km

Dams

Reservoir Dam Name River Year Distance
Kasumigaura Kasumigaura-Kaihatsu Tonegawa 1995 25 km
Yamakura Yamakura Yamakuragawa 1964 70 km
Jajanboike Kozogawa Kozogawa 1985 70 km
Takatakiko Takataki Yorogawa 1990 78 km
Kameyamako Kameyama Obitsugawa 1980 92 km
Miyukiko Gongendochosetsuchi Nakagawa 1991 98 km
Kori Kori Korigawa 1972 99 km

Nuclear plants

Name Country Reactors Distance
TOKAI JAPAN 3 68 km

More information

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