TY  - JOUR
ID  - epos2201
UR  - http://doi.org/10.1111/j.1365-246X.2009.04219.x
IS  - 3
A1  - Zaccarelli, L.
A1  - Pandolfi, Daniela
A1  - Bianco, F.
A1  - Saccorotti, Gilberto
A1  - Bean, Christopher J.
A1  - Pezzo, E. Del
Y1  - 2009///
N2  - Stress can undergo rapid temporal changes in volcanic environments, and this is particularly true during eruptions. We use two independent methods, coda wave interferometry (CWI) and shear wave splitting (SWS) analysis to track stress related wave propagation effects during the waning phase of the 2002 NE fissure eruption at Mt Etna. CWI is used to estimate temporal changes in seismic wave velocity, while SWS is employed to monitor changes in elastic anisotropy. We analyse seismic doublets, detecting temporal changes both in wave velocities and anisotropy, consistent with observed eruptive activity. In particular, syn-eruptive wave propagation changes indicate a depressurization of the system, heralding the termination of the eruption, which occurs three days later.
PB  - Oxford University Press
JF  - Geophysical Journal International
VL  - 178
SN  - 0956-540X
TI  - Temporal changes in seismic wave propagation towards the end of the 2002 Mt Etna eruption
SP  - 1779
AV  - none
EP  - 1788
ER  -