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News & updates
Fri, 15 Jan 2021, 07:50
World map showing volcanoes with shallow (less than 20 km) earthquakes within 20 km radius  during the past 24 hours on 15 Jan 2021 Number in brackets indicate nr of quakes.
Quakes detected near: Akyarlar (1 quake mag 1.1), Banahaw (1 quake mag 2.3), Buzzard Creek (1 quake mag 2.0), Canlaon (1 quake mag 3.8), Clear Lake (25 quakes between mag 0.2-1.4), Coso (2 quakes between mag 0.8-1.4) ... read all
Fri, 15 Jan 2021, 07:43
Distribution of the earthquakes (red frame) in Kaʻū district during the past month (image: HVO)
Seismic network of the Hawaiian Volcano Observatory (HVO) recorded a volcano-tectonic earthquake with magnitude M 4 located beneath the south part of the Island of Hawai'i, in the district of Kaʻū at about 18:15 local time yesterday. ... read all
Fri, 15 Jan 2021, 07:20
Worldwide earthquakes above magnitude 3 during the past 24 hours on 15 Jan 2021
Summary: 1 quake 6.0+, 1 quake 5.0+, 33 quakes 4.0+, 95 quakes 3.0+, 233 quakes 2.0+ (363 total) ... read all
Map of volcanoes in Japan (USGS)
Map of volcanoes in Japan (USGS)

Volcanoes of Japan (270)

Honshu (140 volcanoes): Abu | Adachi | Adatara | Aizu Nunobiki | Akagi | Akita-Komaga-take | Akita-Yake-yama | Aonoyama | Aoso | Asakusa | Asama | Ashitaka | Ayame-daira | Azuma | Azumayasan | Bandai | Bishamon-dake | Chojagahara | Chokai | Daikon-jima | Dainichi-yama | Dainichiga-take | Daira-Komaga-take | Daisen | Daito | Daruma | Dorobu | Eboshi | Eboshi-Washigatake | Funagata | Futamata | Gankyoji | Ganto-Kamuro | Gassan | Hachimantai | Hakkoda | Hakone | Haku-san | Hanamagari | Haruna | Hijiori | Hiuchi | Hodakadake | Hotaka | Iiji | Iizuna | Iwaki | Iwate | Izu-Tobu | Jaishi | Kaminoroka | Kamitakara | Kannabe | Kanpu | Kayo | Kenashi | Kinunuma-Nenakusa | Kirigamine | Kita Yatsuga-take | Kobinai | Komochi-Onoko | Kurikoma | Kurofuji | Kurohime | Kusatsu-Shirane | Kyoga-take | Madarao | Masugata | Megata | Midagahara | Minakami | Momisawa-dake | Moriyoshi | Motodori | Mt Fuji | Mukaimachi | Mutsu-Hiuchi-dake | Mutsure-jima | Myoko | Naeba | Nanashigure | Nantai | Nanzaki | Narugo | Nasu | Nekoma | Niigata-Yake-yama | Nikko-Shirane | Norikura | Noro | Numanokami | Numazawa | Nyoho-Akanagi | Nyuto-Takakura | Oetaka-yama | Ogino-Sen | Oki-Dogo | Okiura | Omanago | Omeshi-dake | Onikobe | Ontake-san | Osore-yama | Ryohaku Maru-yama | Sanbe | Sekita | Sengoku | Shiga | Shikuma | Shirataka | Shirouma-Oike | Sukai-Kesemaru | Sumon | Sunagohara | Taga | Takahara | Takamatsu | Takara | Takayashiro | Tamagawa | Tanaba | Tashiro | Tazawa | Tenshi | Tokuyama-Mitake | Tomuro | Torikabuto | Towada | Tsuruta | Ueno | Usami | Utsukushigahara | Washiba-Kumonotaira | Yake-dake | Yakeishi | Yatsugatake | Yokote | Yuga-mine | Yugawara | Zao
Japan has over 100 active volcanoes, more than almost any other country and accounts alone for about 10 % of all active volcanoes in the world. The volcanoes belong to the Pacific Ring of Fire, caused by subduction zones of the Pacific plate beneath continental and other oceanic plates along its margins.
Japan's volcanic arcs and tectonic setting
Japan is located at the junction of 4 tectonic plates - the Pacific, Philippine, Eurasian and North American plates, and its volcanoes are mainly located on 5 subduction-zone related volcanic arcs where the Pacific Plate descends under the North American Plate along the Kuril Trench and the Japan Trench and underneath the Philippine Sea Plate along the Izu-Bonin Trench. The Philippine Plate itself subducts beneath the Eurasian Plate at the western end, forming the Ryukyu Trench. The principal resulting volcanic ars are:
- Ryukyu Arc and Southwest Honshu Arcs in the south (Philippine plate subducting beneath between the Eurasian Plate),
- Izu-Bonin-Mariana Arc (subduction of Pacific plate beneath Philippine plate)
- Northeast Honshu and Kurile Arc in the north (subduction of Pacific plate beneath the N-American plate)
(more info: www.glgarcs.net/intro/subduction.html)

Besides intense volcanic activity, Japan is one of the places in the world most affected by frequent, and sometimes devastatingly large earthquakes. Its oceanic setting makes it vulnerable for tsunamis as well, as the tragedy of the 11 March 2011 8.9 earthquake and tsunami terrifyingly illustrated.

Record in historically documented eruptions
Japan's first documented historical eruption was from Aso volcano in 553 AD , the year after Buddhism was introduced from Korea. It holds a record in the number of historically documented eruptions.
Japan's largest historical eruption (Towada, 915 AD), 17 Japanese volcanoes had been documented in eruption, more than the rest of the world combined (including 10 in Europe).

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