CTBT Science and Technology Conference 2021 (SnT2021)

Seismicity along the seismogenic zone of Algarve region (southern Portugal)

P1.2-660

29 Jun 2021, 09:00

3h

Online

e-Poster T1.2 - The Solid Earth and its Structure T1.2 e-poster session

Speaker

Ms Assia Dib (Université des Sciences et de la Technologie Houari Boumedien, Algiers, Algeria)

Description

The present seismological study, focused around Algarve region, was carried out through a cooperation project between the Universities of Évora (Portugal), Lisbon (Portugal), Strasbourg (France) and the IPMA (Lisbon, Portugal). To locate the seismic events and find the local velocity structure of the epicentral area, the P and S arrival times at 38 stations are used (Geostar stations, telemetered network, U. Lisbon and IPMA stations). The data used in this study were obtained during the Algarve campaign, which worked, from January/2006 to July/2007. The preliminary estimate of origin times and hypocentral coordinates are determined by the Hypoinverse program. Linearized inversion procedure was applied to comprise the following two steps: 1) finding the velocity model using Velest and 2) simultaneous relocation of hypocenters and determination of local velocity structure. This
work is expected to produce a more detailed knowledge of the crust structure over the region of Algarve, being able to identify seismogenic zones, potentially generators of significant
seismic events and the identification of zones of active faults.

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