Overall Green alert Volcanic eruption for Asamayama
in Japan

Event summary

Volcanic eruption Asamayama is expected to have a low humanitarian impact based on the magnitude and the affected population and their vulnerability.

Name: Asamayama
Lat/Lon: 36.406 , 138.523
Event Date: 08 Aug 2019 00:00 UTC
Exposed Population 30km: About 340000 people within 30km
Exposed Population 100km: About 5500000 people within 100km
Volcanic explosivity index: 5
Population exposure index: 5
Inserted at: 08 Aug 2019 08:10 UTC

GDACS Score

For more info on GDACS alert score click here.

Volcano Timeline

IDGDACS alert colorDateSource
1 08 Aug 2019 00:00 TOKYO

Exposed population

The eruption happened in Japan , Region of Chubu (population 5,172,046) . The nearest places are Sengataki Higashiku, Oshikippa, Seiman, Akagawa, Kutsukake, Kuridaira, Shiono, Kusagoe, Nidoage, Karuishi, and Kofu.

Radius Population
100 km 5.5 million people
75 km 3.1 million people
50 km 1.2 million people
30 km 330000 people
20 km 150000 people
10 km 18000 people
5 km <1000 people
2 km <1000 people

Affected Provinces

Region Province Country Population
Chubu Japan 5.1 million people
Kanto Japan 38.5 million people

Affected populated places

Name Region Province Country City class Population Distance
Sengataki Higashiku Nagano Japan Village6 - 7 km
Oshikippa Gunma Japan Village6 - 7 km
Seiman Nagano Japan Village6 - 7 km
Akagawa Gunma Japan Village6 - 8 km
Kutsukake Nagano Japan Village6 - 8 km
Kuridaira Gunma Japan Village6 - 9 km
Shiono Nagano Japan Village6 - 10 km
Kusagoe Nagano Japan Village6 - 10 km
Nidoage Gunma Japan Village6 - 10 km
Karuishi Nagano Japan Village6 - 10 km
Tateno Gunma Japan Village6 - 10 km
Azuma Gunma Japan Village6 - 11 km
Tashiro Gunma Japan Village6 - 11 km
Toriibara Nagano Japan Village6 - 11 km
Hishino Nagano Japan Village6 - 11 km
Agatsuma Gunma Japan Village6 - 11 km
Hirahara Nagano Japan Village6 - 11 km
Hiroto Nagano Japan Village6 - 11 km
Hongo Nagano Japan Village6 - 12 km
Ozaso Gunma Japan Village6 - 12 km
Karuizawa Nagano Japan City - 12 km
Hotchi Nagano Japan Village6 - 12 km
Mikage-Shinden Nagano Japan Village6 - 12 km
Goshodaira Gunma Japan Village6 - 12 km
Nishihara Nagano Japan Village6 - 13 km
Kambara Gunma Japan Village6 - 13 km
Uenogai Gunma Japan Village6 - 14 km
Kohara Nagano Japan Village6 - 14 km
Mihara Gunma Japan Village6 - 14 km
Nagatoro Nagano Japan Village6 - 15 km
Iwamurada Nagano Japan Village6 - 15 km
Tokikubo Nagano Japan Village6 - 15 km
Mimitori Nagano Japan Village6 - 15 km
Kosaka Higashichi Nagano Japan Village6 - 15 km
Saku Nagano Japan Village4 68000 people 15 km
Netsu Nagano Japan Village6 - 16 km
Ashuda Gunma Japan Village6 - 16 km
Shingeni Station Nagano Japan Village6 - 16 km
Dozen Gunma Japan Village6 - 16 km
Hiratsuka Nagano Japan Village6 - 16 km
Tazawa Nagano Japan Village6 - 17 km
Arakado Nagano Japan Village6 - 17 km
Hammaiba Gunma Japan Village6 - 17 km
Nitazawa Gunma Japan Village6 - 17 km
Kakuma Nagano Japan Village6 - 17 km
Furumori Gunma Japan Village6 - 17 km
Handegi Gunma Japan Village6 - 17 km
Toiri Gunma Japan Village6 - 17 km
Yokozawa Nagano Japan Village6 - 17 km
Sanada Nagano Japan Village6 - 18 km
Shinkai Gunma Japan Village6 - 18 km
Mimayose Nagano Japan Village6 - 18 km
Haneo Gunma Japan Village6 - 18 km
Onga Gunma Japan Village6 - 18 km
Okawa Nagano Japan Village6 - 18 km
Yawata Nagano Japan Village6 - 18 km
Yamane Nagano Japan Village6 - 19 km
Machi Nagano Japan Village6 - 19 km
Fukubo Gunma Japan Village6 - 19 km
Sasai Nagano Japan Village6 - 19 km
Chojuen Gunma Japan Village6 - 19 km
Okura Nagano Japan Village6 - 20 km
Kozu Bokujo Gunma Japan Village6 - 20 km
Yokokabe Gunma Japan Village6 - 20 km
Hiraka Nagano Japan Village6 - 20 km
Nakagomi Nagano Japan Village6 - 20 km
Nakamura Nagano Japan Village6 - 20 km
Naganohara Gunma Japan Village4 - 20 km
Magario Nagano Japan Village6 - 20 km
Akachiku Gunma Japan Village6 - 20 km
Kaize Gunma Japan Village6 - 20 km
Yashiki Gunma Japan Village6 - 20 km
Nish-Araya Gunma Japan Village6 - 21 km
Anazawa Nagano Japan Village6 - 21 km
Kitazawa Nagano Japan Village6 - 21 km
Nigamizu Nagano Japan Village6 - 21 km
Yukubo Gunma Japan Village6 - 21 km
Oniwa Nagano Japan Village6 - 21 km
Yokokawa Gunma Japan Village6 - 21 km
Zuihara Gunma Japan Village6 - 21 km
Yokomichi Nagano Japan Village6 - 21 km
Kongoji Nagano Japan Village6 - 21 km
Fujiharado Nagano Japan Village6 - 22 km
Daiba Gunma Japan Village6 - 22 km
Nagashima Nagano Japan Village6 - 22 km
Itagasawa Gunma Japan Village6 - 22 km
Shiozawa Nagano Japan Village6 - 22 km
Kiyokawa Nagano Japan Village6 - 22 km
Higashi-gumi Nagano Japan Village6 - 22 km
Ogushi Gunma Japan Village6 - 22 km
Kuroda Nagano Japan Village6 - 22 km
Nagase Nagano Japan Village6 - 22 km
Ashida Nagano Japan Village6 - 22 km
Mochizuki Nagano Japan Village6 - 22 km
Kuguto Gunma Japan Village6 - 22 km
Motai Nagano Japan Village6 - 22 km
Hinata Nagano Japan Village6 - 22 km
Goshodaira Gunma Japan Village6 - 23 km
Miyahara Gunma Japan Village6 - 23 km
Hayashi Gunma Japan Village6 - 23 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
Nagano 347 0 37 km
Matsumoto MMJ 666 Civ. Paved Yes 6500 60 km
Shimo Kolzumi 30 0 80 km
313 0 80 km

Ports

Name LOCODE Country Distance
Naoetsu JPNAO Japan 89 km

Dams

Reservoir Dam Name River Year Distance
Tashiroko Kazawa Agatsumagawa 1927 10 km
Sugadairako Sugadaira Kangawa 1968 19 km
Nyuko Nyu Nyukawa 1952 32 km
Nozoriko Nozori Nakatsugawa 1956 36 km
Oshioko Oshio Nanmokugawa 1968 38 km
Narusawako Narusawa Harunashirakawa 1950 38 km
Akayako Aimata Akayagawa 1959 48 km
Makabechoseichi Makabe Tonegawa 1928 48 km
Kannako Shimokubo Kannagawa 1968 54 km
Okususobana Okususobana Susobanagawa 1979 61 km
Chichibuko Futase Arakawa 1961 62 km
Tanbarako Tanbara Hocchigawa 1981 63 km
Fujiwarako Fujiwara Tonegawa 1957 64 km
Sonoharako Sonohara Katashinagawa 1965 64 km
Otomiko Sasagamine Sekigawa 1979 65 km
Hiroseko Hirose Fuefukigawa 1974 66 km
Ryujinko Omachi Takasegawa 1985 68 km
Momijiko Minowa Sawagawa 1992 69 km
Dogenko Sudagai Tonegawa 1955 70 km
Nanakura Nanakura Takasegawa 1978 71 km
Nosenko Arakawa Arakawa 1985 72 km
Naramatako Naramata Naramatagawa 1990 73 km
Inekoki Inekoki Azusagawa 1969 73 km
Okutoneko Yagisawa Tonegawa 1967 74 km
Midono Midono Azusagawa 1970 75 km
Takaseko Takase Takasegawa 1979 75 km
Takatoko Takato Mibugawa 1958 76 km
Miwako Miwa Mibugawa 1959 77 km
Kusakiko Kusaki Watarasegawa 1976 78 km
Chiyodako Maruyamatameike Obinagawa 1936 78 km
Azusako Nagawado Azusagawa 1969 79 km
Kurobeko Kurobe Kurobegawa 1961 79 km
Okugisoko Misogawa Kisogawa 2001 83 km
Naraiko Narai Naraigawa 1982 83 km
Okutamako Ogohchi Tamagawa 1957 83 km
Naguriko Arima Arimagawa 1985 83 km
Shakunageko Sagurigawa Sagurigawa 1993 84 km
Shozenjiko Shozenji Shozenjigawa 1984 88 km
Naradako Nishiyama Hayakawa 1957 95 km
Akaiwa Akaiwa Tannegawa 1990 99 km

Nuclear plants

More information

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