Get our newsletter!
Check out the volcano tours offered by Volcano-Adventures!
Volcanoes & Earthquakes - new app for Android
Guaranteed tours:
14-27 Nov 2017: Expedition Papua - Papua New Guinea
23 Dec 17 - 5 Jan 2018: Desert, salt and volcanoes - Danakil desert (Ethiopia)
30 Dec 17 - 6 Jan 2018: Nyiragongo Lava Lake & Mountain Gorillas - DR Congo + Rwanda
13-26 Jan 2018: Desert, salt and volcanoes - Danakil desert (Ethiopia)
28 Jan - 4 Feb 2018: Nyiragongo Lava Lake & Mountain Gorillas - DR Congo + Rwanda
17-23 Mar 2018: Kilauea Volcano Special - Big Island, Hawaiʻi
25-29 Mar 2018: Sakurajima Volcano Special - Kyushu (Japan)
28 Apr - 3 May 2018: Aegean's Hidden Gem: Isle of Milos - Milos Island (Greece)
5-13 May 2018: From Stromboli to Etna - Eolian Islands + Etna volcano (Italy)
: spaces available / : guaranteed / : few spaces left / : booked out
Random pictures
News

no news in this list.

 

Usu volcano

stratovolcano 737 m / 2,418 ft
Hokkaido, Japan, 42.54°N / 140.84°E
Current status: dormant (1 out of 5)
Usu volcano books
Typical eruption style: explosive
Usu volcano eruptions: 2000-01, 1977-82, 1944-45, 1910, 1853, 1822, 1769, 1663, 1638, 1626, 1611 (?)
TimeMag. / DepthDistanceLocation
Sun, 8 Oct
Sun, 8 Oct 01:38 UTCM 4.7 / 118 km26 km HOKKAIDO, JAPAN REGION
Mt Usu (有珠山) volcano is Hokkaido is one of Japan's most well-known volcanoes. The summit of Usu consists of several lava domes that formed in historic time.
The last eruption was in March 2000 - September 2001, when Usu erupted for the first time in 22 years and forced the evacuation of 13,000 residents.

Background:

from Smithsonian / GVP volcano information:
Usu is a small stratovolcano located astride the southern topographic rim of the 110,000-year-old Toya caldera. The center of the 10-km-wide, lake-filled caldera contains Naka-jima, a group of forested andesitic lava domes. The summit of the basaltic-to-andesitic edifice of Usu is cut by a somma formed about 7-8,000 years ago when collapse of the volcano produced a debris avalanche that reached the sea. Dacitic domes erupted along two NW-SE-trending lines fill and flank the summit caldera. Three of these domes, O-Usu, Ko-Usu and Showa-Shinzan, along with seven crypto-domes, were erupted during historical time. The 1663 eruption of Usu was one of the largest in Hokkaido during historical time. The war-time growth of Showa-Shinzan from 1943-45 was painstakingly documented by the local postmaster, who created the first detailed record of growth of a lava dome.

Usu Photos:



2000-01 eruption
The 2000 eruption of Usu volcano was the first in 22 years and followed several days of increased seismicity and ground deformation.
A first new vent opened in the West-Nishiyama area on 31 March 2000, followed by activity in the Kompira area on 1 April. Eruptive activity lasted for more than a year and gradually declined until September 2001. The eruptions were phreatic and phreato-magmatic, and caused small pyroclastic flows.
A large area of Usu volcano deformed during the eruption by uplift of up to 60 m vertical displacement and involving a volume of ca. 40 million m3.

1663 Plinian eruption
In 1663 Usu had a Plinian eruption (VEI5), one of the largest eruptions on Hokkaido during historical times. It caused wide-spread damage and fatalities.

Latest satellite images

 

More on VolcanoDiscovery:

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.