HR: 14:55h
AN: V52C-06    [PDF]
TI: The 2002-2003 Mt. Etna Eruption: Insights From Volcanic Tremor Analysis
AU: * Falsaperla, S
EM: falsaperla@ct.ingv.it
AF: Ist. Nazionale Geofisica e Vulcanologia, Sezione Catania, P.zza Roma 2, Catania, 95123 Italy
AU: Spampinato, S
EM: spampinato@ct.ingv.it
AF: Ist. Nazionale Geofisica e Vulcanologia, Sezione Catania, P.zza Roma 2, Catania, 95123 Italy
AU: Langer, H
EM: langer@ct.ingv.it
AF: Ist. Nazionale Geofisica e Vulcanologia, Sezione Catania, P.zza Roma 2, Catania, 95123 Italy
AB: The unrest of Mt. Etna in Fall 2002 marked a renewal of effusive activity shortly after the previous eruptive episode, which occurred between July and August 2001. The brief time span between the two eruptions and the similarities in the composition of the volcanic products erupted have led to surmise their strict link, which is supported by several geophysical evidence as well. Seismic swarms and remarkable changes in volcanic tremor at the beginning of both eruptions characterized seismic activity recorded at the permanent seismic network. We analyze the main features of volcanic tremor between the 2002-2003 eruption, providing a characterization of this signal in the time and frequency domains. We discuss the amplitude and frequency variations at several seismic stations, which are located at different distances with respect to the volcanic source. Besides, we propose a comparison with the previous eruptive episode, during which remarkable changes in the amplitude of volcanic tremor accompanied and marked different styles of eruptive activity.
DE: 7230 Seismicity and seismotectonics
DE: 7280 Volcano seismology (8419)
DE: 8400 VOLCANOLOGY
DE: 8414 Eruption mechanisms
DE: 8419 Eruption monitoring (7280)
SC: Volcanology, Geochemistry, Petrology [V]
MN: 2003 Fall Meeting