Follow us:
FacebookTwitterGoogle PlusYouTube
News & updates
Strombolian explosion at Aso's Nakadake crater a few minutes ago
Wednesday, Mar 04, 2015
The strombolian eruption continues with little changes. Incandescent bombs are ejected from the main vent of Nakadake crater to above the crater rim. Low level ash plumes rise to 1-2 km altitude. [more]
Ash plume from Sakurajima this morning drifting east
The volcano has had at least 7 explosions during the past 24 hours, including 3 which produced ash plumes to 10-12,000 ft (3-3.6 km) altitude. Most ash drifted to easterly directions, causing lots of light ash fall in that sector. [more]
Thursday, Feb 19, 2015
36 explosions occurred from Showa Crater during 9-13 February and ejected tephra as far as 1,300 m. ... [more]
Ash plume from Aso's Nakadake crater this morning
Monday, Feb 16, 2015
No significant changes in the ongoing mild eruption have occurred over the past weeks. Small ash emissions from strombolian activity inside Nakadake crater are near continuous. [more]
Glow from strombolian activty at Suwanose-jima volcano
Strombolian activity from On-take's crater continues to be on the higher end of the average scale and produces small ash plumes. [more]
Map of volcanoes in Japan (USGS)
Map of volcanoes in Japan (USGS)

Volcanoes of Japan (118 volcanoes)

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).

Useful Links:

More on VolcanoDiscovery:

Comments:

Copyrights: VolcanoDiscovery and other sources as noted.
Use of material: Text and images on this webpage are copyrighted. Further reproduction and use without authorization is not consented. If you need licensing rights for photographs, for example for publications and commercial use, please contact us.