TY - JOUR
T1 - Magma flow instability and cyclic activity at Soufriere Hills volcano, Montserrat, British West Indies
AU - Voight, B.
AU - Sparks, RSJ
AU - Miller, AD
AU - Stewart, RC
AU - Hoblitt, R.P
AU - Clarke, A
AU - Ewart, J
AU - Aspinall, WP
AU - Baptie, B
AU - Calder, ES
AU - Cole, P
AU - Druitt, TH
AU - Hartford, C
AU - Herd, Richard
AU - Jackson, P
AU - Lejeune, AM
AU - Lockhart, AB
AU - Loughlin, SC
AU - Luckett, R
AU - Lynch, L
AU - Norton, GE
AU - Robertson, R
AU - Watson, IM
AU - Watts, R
AU - Young, SR
PY - 1999/2/19
Y1 - 1999/2/19
N2 - Dome growth at the Soufriere Hills volcano (1996 to 1998) was frequently accompanied by repetitive cycles of earthquakes, ground deformation, degassing, and explosive eruptions. The cycles reflected unsteady conduit flow of volatile-charged magma resulting from gas exsolution, rheological stiffening, and pressurization. The cycles, over hours to days, initiated when degassed stiff magma retarded flow in the upper conduit. Conduit pressure built with gas exsolution, causing shallow seismicity and edifice inflation. Magma and gas were then expelled and the edifice deflated. The repeat time-scale is controlled by magma ascent rates, degassing, and microlite crystallization kinetics. Cyclic behavior allows short-term forecasting of timing, and of eruption style related to explosivity potential.
AB - Dome growth at the Soufriere Hills volcano (1996 to 1998) was frequently accompanied by repetitive cycles of earthquakes, ground deformation, degassing, and explosive eruptions. The cycles reflected unsteady conduit flow of volatile-charged magma resulting from gas exsolution, rheological stiffening, and pressurization. The cycles, over hours to days, initiated when degassed stiff magma retarded flow in the upper conduit. Conduit pressure built with gas exsolution, causing shallow seismicity and edifice inflation. Magma and gas were then expelled and the edifice deflated. The repeat time-scale is controlled by magma ascent rates, degassing, and microlite crystallization kinetics. Cyclic behavior allows short-term forecasting of timing, and of eruption style related to explosivity potential.
U2 - 10.1126/science.283.5405.1138
DO - 10.1126/science.283.5405.1138
M3 - Article
VL - 283
SP - 1138
EP - 1142
JO - Science
JF - Science
SN - 0036-8075
IS - 5405
ER -