Publikationsdatum:
2017-04-04
Beschreibung:
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.
Beschreibung:
Published
Beschreibung:
1779-1788
Beschreibung:
1.4. TTC - Sorveglianza sismologica delle aree vulcaniche attive
Beschreibung:
JCR Journal
Beschreibung:
reserved
Schlagwort(e):
Interferometry
;
Seismic anisotropy
;
Volcano seismology
;
Volcano monitoring
;
04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology
Repository-Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Materialart:
article
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