Publikationsdatum:
2021-01-22
Beschreibung:
This work describes the automatic picking of the P-phase arrivals of the 3*10^6 seismic registers originated during the TOMO-ETNA experiment. Air-gun shots produced by the vessel “Sarmiento de Gamboa” and contemporary passive seismicity occurring in the island are recorded by a dense network of stations deployed for the experiment. In such scenario, automatic processing is needed given: (i) the enormous amount of data,
(ii) the low signal-to-noise ratio of many of the available registers and, (iii) the accuracy needed for the velocity tomography resulting from the experiment. A preliminary processing is performed with the records obtained from all stations. Raw data formats from the different types of stations are unified, eliminating defective records and reducing noise through filtering in the band of interest for the phase picking. The advanced multiband picking algorithm (AMPA) is then used to process the big database obtained and determine the travel times of the seismic phases. The approach of AMPA, based on frequency multiband denoising
and enhancement of expected arrivals through optimum detectors, is detailed together with its calibration and quality assessment procedure. Examples of its usage for active and passive seismic events are presented.
Beschreibung:
Published
Beschreibung:
S0434
Beschreibung:
2V. Dinamiche di unrest e scenari pre-eruttivi
Beschreibung:
JCR Journal
Beschreibung:
open
Schlagwort(e):
Multiband frequency analysis
;
Automatic P-phase picking
;
Active/passive seismic phases
;
TOMO-ETNA
;
04. Solid Earth::04.06. Seismology::04.06.09. Waves and wave analysis
Repository-Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Materialart:
article
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