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
Max Volc. Explosivity Index VEI: 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 Village - 7 km
Oshikippa Gunma Japan Village - 7 km
Seiman Nagano Japan Village - 7 km
Akagawa Gunma Japan Village - 8 km
Kutsukake Nagano Japan Village - 8 km
Kuridaira Gunma Japan Village - 9 km
Shiono Nagano Japan Village - 10 km
Kusagoe Nagano Japan Village - 10 km
Nidoage Gunma Japan Village - 10 km
Karuishi Nagano Japan Village - 10 km
Tateno Gunma Japan Village - 10 km
Azuma Gunma Japan Village - 11 km
Tashiro Gunma Japan Village - 11 km
Toriibara Nagano Japan Village - 11 km
Hishino Nagano Japan Village - 11 km
Agatsuma Gunma Japan Village - 11 km
Hirahara Nagano Japan Village - 11 km
Hiroto Nagano Japan Village - 11 km
Hongo Nagano Japan Village - 12 km
Ozaso Gunma Japan Village - 12 km
Karuizawa Nagano Japan City - 12 km
Hotchi Nagano Japan Village - 12 km
Mikage-Shinden Nagano Japan Village - 12 km
Goshodaira Gunma Japan Village - 12 km
Nishihara Nagano Japan Village - 13 km
Kambara Gunma Japan Village - 13 km
Uenogai Gunma Japan Village - 14 km
Kohara Nagano Japan Village - 14 km
Mihara Gunma Japan Village - 14 km
Nagatoro Nagano Japan Village - 15 km
Iwamurada Nagano Japan Village - 15 km
Tokikubo Nagano Japan Village - 15 km
Mimitori Nagano Japan Village - 15 km
Kosaka Higashichi Nagano Japan Village - 15 km
Saku Nagano Japan Village 68000 people 15 km
Netsu Nagano Japan Village - 16 km
Ashuda Gunma Japan Village - 16 km
Shingeni Station Nagano Japan Village - 16 km
Dozen Gunma Japan Village - 16 km
Hiratsuka Nagano Japan Village - 16 km
Tazawa Nagano Japan Village - 17 km
Arakado Nagano Japan Village - 17 km
Hammaiba Gunma Japan Village - 17 km
Nitazawa Gunma Japan Village - 17 km
Kakuma Nagano Japan Village - 17 km
Furumori Gunma Japan Village - 17 km
Handegi Gunma Japan Village - 17 km
Toiri Gunma Japan Village - 17 km
Yokozawa Nagano Japan Village - 17 km
Sanada Nagano Japan Village - 18 km
Shinkai Gunma Japan Village - 18 km
Mimayose Nagano Japan Village - 18 km
Haneo Gunma Japan Village - 18 km
Onga Gunma Japan Village - 18 km
Okawa Nagano Japan Village - 18 km
Yawata Nagano Japan Village - 18 km
Yamane Nagano Japan Village - 19 km
Machi Nagano Japan Village - 19 km
Fukubo Gunma Japan Village - 19 km
Sasai Nagano Japan Village - 19 km
Chojuen Gunma Japan Village - 19 km
Okura Nagano Japan Village - 20 km
Kozu Bokujo Gunma Japan Village - 20 km
Yokokabe Gunma Japan Village - 20 km
Hiraka Nagano Japan Village - 20 km
Nakagomi Nagano Japan Village - 20 km
Nakamura Nagano Japan Village - 20 km
Naganohara Gunma Japan Village - 20 km
Magario Nagano Japan Village - 20 km
Akachiku Gunma Japan Village - 20 km
Kaize Gunma Japan Village - 20 km
Yashiki Gunma Japan Village - 20 km
Nish-Araya Gunma Japan Village - 21 km
Anazawa Nagano Japan Village - 21 km
Kitazawa Nagano Japan Village - 21 km
Nigamizu Nagano Japan Village - 21 km
Yukubo Gunma Japan Village - 21 km
Oniwa Nagano Japan Village - 21 km
Yokokawa Gunma Japan Village - 21 km
Zuihara Gunma Japan Village - 21 km
Yokomichi Nagano Japan Village - 21 km
Kongoji Nagano Japan Village - 21 km
Fujiharado Nagano Japan Village - 22 km
Daiba Gunma Japan Village - 22 km
Nagashima Nagano Japan Village - 22 km
Itagasawa Gunma Japan Village - 22 km
Shiozawa Nagano Japan Village - 22 km
Kiyokawa Nagano Japan Village - 22 km
Higashi-gumi Nagano Japan Village - 22 km
Ogushi Gunma Japan Village - 22 km
Kuroda Nagano Japan Village - 22 km
Nagase Nagano Japan Village - 22 km
Ashida Nagano Japan Village - 22 km
Mochizuki Nagano Japan Village - 22 km
Kuguto Gunma Japan Village - 22 km
Motai Nagano Japan Village - 22 km
Hinata Nagano Japan Village - 22 km
Goshodaira Gunma Japan Village - 23 km
Miyahara Gunma Japan Village - 23 km
Hayashi Gunma Japan Village - 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.