TY - JOUR
T1 - The outline of the 2011 eruption at Shinmoe-dake (Kirishima), Japan
AU - Nakada, Setsuya
AU - Nagai, Masashi
AU - Kaneko, Takayuki
AU - Suzuki, Yuki
AU - Maeno, Fukashi
N1 - Funding Information:
Acknowledgments. We would like to Kazuo Shimousuki, Take-haru Nagatomo, Tetsuo Kobayashi, and Japan Meteorological Agency for providing us photographs used in this paper. Field survey was supported by Yasuo Miyabuchi, Tetsuo Kobayashi, Nat-sumi Hokanishi, and the General Observation Team organized under the National Coordination Committee for Volcanic Eruption Prediction. The software to view continuous seismic waves and video-images simultaneously, WAVE VS IMAGE, developed by Mie Ichihara was very effective in this study. This research was supported by MEXT KAKENHI Grant No. 22900001 (SN). We thank Chris Newhall and Hiroshi Shinohara for careful reading of our manuscript and for giving useful comments.
PY - 2013
Y1 - 2013
N2 - The climactic phase of the 2011 eruption at Shinmoe-dake was a mixture of subplinian and vulcanian eruptive events, successive lava accumulation (lava dome) within the crater, and repetition of vulcanian events after the dome growth. It was preceded by inflation and elevated seismicity for about one year and by phreatomagmatic explosions of one week before. Small pyroclastic flows and ash-cloud surges formed during the subplinian events, when the eruption column reached the highest level and the vent was widened. A lava dome, which was extruded close to the vent of subplinian events, grew by swelling upward and filling the crater. After the vent was covered by the lava, an intense vulcanian event occurred from the base of the dome and the swelled dome became deflated. After that, vulcanian events were repeated for three months. Simultaneous eruption styles in the crater (vulcanian events, continuous ash emission and dome growth) and some phreatomagmatic events in the vulcanian stage probably are due to a complex upper-conduit system developed in water-saturated country rock.
AB - The climactic phase of the 2011 eruption at Shinmoe-dake was a mixture of subplinian and vulcanian eruptive events, successive lava accumulation (lava dome) within the crater, and repetition of vulcanian events after the dome growth. It was preceded by inflation and elevated seismicity for about one year and by phreatomagmatic explosions of one week before. Small pyroclastic flows and ash-cloud surges formed during the subplinian events, when the eruption column reached the highest level and the vent was widened. A lava dome, which was extruded close to the vent of subplinian events, grew by swelling upward and filling the crater. After the vent was covered by the lava, an intense vulcanian event occurred from the base of the dome and the swelled dome became deflated. After that, vulcanian events were repeated for three months. Simultaneous eruption styles in the crater (vulcanian events, continuous ash emission and dome growth) and some phreatomagmatic events in the vulcanian stage probably are due to a complex upper-conduit system developed in water-saturated country rock.
KW - Lava dome
KW - Phreatic event
KW - Phreatomagmatic event
KW - Subplinian event
KW - Vulcanian event
UR - http://www.scopus.com/inward/record.url?scp=84877002162&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84877002162&partnerID=8YFLogxK
U2 - 10.5047/eps.2013.03.016
DO - 10.5047/eps.2013.03.016
M3 - Article
AN - SCOPUS:84877002162
SN - 1343-8832
VL - 65
SP - 475
EP - 488
JO - Earth, Planets and Space
JF - Earth, Planets and Space
IS - 6
ER -