We present a new, consistently processed seismicity catalogue for the Eastern and Southern Alps, based on the temporary dense Swath-D monitoring network. The final catalogue includes 6,053 earthquakes for the time period 2017-2019 and has a magnitude of completeness of Mc 1.0. The smallest detected and located events have a magnitude of Ml = −0.5. Aimed at the low to moderate seismicity in the study region, we generated a multi-level, mostly automatic workflow which 5 combines a priori information from local catalogues and waveform-based event detection, subsequent efficient GPU-based event search by template matching, P & S arrival time pick refinement and location in a regional 3-D velocity model. The resulting seismicity distribution generally confirms the previously identified main seismically active domains, but provides increased resolution of the fault activity at depth. In particular, the high number of small events additionally detected by the template search contributes to a more dense catalogue, providing an important basis for future geological and tectonic 10 studies in this complex part of the Alpine orogen.

A New Seismicity Catalogue of the Eastern Alps Using the Temporary Swath-D Network

Pesaresi, Damiano
Membro del Collaboration Group
2023-01-01

Abstract

We present a new, consistently processed seismicity catalogue for the Eastern and Southern Alps, based on the temporary dense Swath-D monitoring network. The final catalogue includes 6,053 earthquakes for the time period 2017-2019 and has a magnitude of completeness of Mc 1.0. The smallest detected and located events have a magnitude of Ml = −0.5. Aimed at the low to moderate seismicity in the study region, we generated a multi-level, mostly automatic workflow which 5 combines a priori information from local catalogues and waveform-based event detection, subsequent efficient GPU-based event search by template matching, P & S arrival time pick refinement and location in a regional 3-D velocity model. The resulting seismicity distribution generally confirms the previously identified main seismically active domains, but provides increased resolution of the fault activity at depth. In particular, the high number of small events additionally detected by the template search contributes to a more dense catalogue, providing an important basis for future geological and tectonic 10 studies in this complex part of the Alpine orogen.
2023
Seismicity Catalogue, Eastern Alps, Swath-D, seismic network
File in questo prodotto:
File Dimensione Formato  
A_New_Seismicity_Catalogue_of_the_Eastern_Alps_Usi-min.pdf

accesso aperto

Tipologia: Versione Editoriale (PDF)
Licenza: Copyright dell'editore
Dimensione 6.23 MB
Formato Adobe PDF
6.23 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14083/20883
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 2
  • ???jsp.display-item.citation.isi??? ND
social impact