2026-06-28T04:44:54Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/236972024-07-29T13:44:49Zcom_20.500.14352_14col_20.500.14352_15

Refining seismic parameters in low seismicity areas by 3D trenching: TheAlhama de Murcia fault, SE Iberia Ferrater, Marta Ortuño, María Masana, Eulàlia Pallàs, Raimon Perea Manera, Héctor Baize, Stephane Martínez Díaz, José Jesús García Meléndez, Eduardo Echeverria, Anna Rockwell, Thomas K. Sharp, Warren D. Medialdea, Alicia Rhodes, Edward J. hree-dimensional paleoseismology in strike-slip faults with slip rates less than 1 mm per year involves a greatmethodological challenge. We adapted 3D trenching to track buried channels offset by the Alhama de Murciaseismogenic left-lateral strike-slip fault (SE Iberia). A fault net slip of 0.9 ± 0.1 mm/yr was determined usingstatistical analysis of piercing lines for one buried channel, whose age is constrained between 15.2 ± 1.1 kaand 21.9–22.3 cal BP. This value is larger and more accurate than the previously published slip rates for thisfault. The minimum number offive paleo-earthquakes identified since the deposition of dated layers suggestsa maximum average recurrence interval of approximately 5 ka. The combination of both seismic parametersyields a maximum slip per event between 5.3 and 6.3 m. We show that accurately planned trenching strategiesand data processing may be key to obtaining robust paleoseismic parameters in low seismicity ares 2023-06-18T05:59:02Z 2023-06-18T05:59:02Z 2023-06-18T05:59:02Z 2016-06 journal article https://hdl.handle.net/20.500.14352/23697 0040-1951 10.1016/j.tecto.2016.05.020 eng SHAKE CGL2011-30005-C02-02 RISKNAT-2014SGR/1243 restricted access Elsevier