Review of methods that implement active faults characterization for PSHA in Southern Spain. Preliminary results of the application of the FAMS method.

• DOI: 10.5194/egusphere-egu24-18523
• Publication Date: 2024-03-11T10:07:27Z
• Authors: Adriana Fatima Or...; Carlos Gamboa-Canté; María Belén Benito; Alicia Rivas-Medina; Ligia Quirós-Hern...
• Keywords: Characterization

Incorporating faults as independent seismic sources in Probabilistic Seismic Hazard Assessment (PSHA) significantly influences the ground motion values when compared to classical zoning methods (CZM). This practice holds particular relevance for populations situated top or near active faults. Some hybrid (HM) and fault-based methods, implemented Spain, show that Peak Ground Acceleration (PGA) increase vicinity of fault traces. In some cases hazard levels may double, consistent with PGA observed recent earthquakes (Rivas-Medina, A., 2018; Gómez-Novell O., 2020). Despite existence combine zones characterization, there is a lack allocation potential between these two types sources. Additionally, an increasing use geological data since catalogs alone are insufficient fully characterize limitation becomes particularly evident slow deformation zones, such southeastern where recurrence period exceeds temporal coverage catalog. The present investigation addresses key aspects: how quantify information transfer it models, distribute region zone. research contemplates steps. first step, four were applied: 1) Moment rate-based method, 2) Slip both proposed by Bungum (2007); 3) method developed Rivas-Medina et al. (2018), which considers zone-type fault-type sources; 4) SHERIFS, system-based assessment Cartier (2019). In second Faults Area Sharing (FAMS) (Ornelas-Agrela al., 2022*) applied. new enables characterizing based on their associated seismicity, improving distribution zones. The five applied multiple seismogenic within recognized one most seismically areas country. An analysis was conducted, highlighting sensitivity results PSHA implementation. preliminary FAMS application presented. * presented Ornelas-Agrela, A. at Iberfault2022 congress Teruel, Spain.