DSpace Collection:
http://hdl.handle.net/10261/5071
2024-03-26T16:10:25ZOceans and Human health
http://hdl.handle.net/10261/267622
Título: Oceans and Human health
Autor: Lloret, Josep; Berdalet, Elisa; Diogène, Jorge; Grimalt, Joan O.; Olivos-Ortiz, Aramis; Àvila, Conxita; Constenla Matalobos, María
Resumen: In this presentation we will show some of the challenges more directly related to the impacts on human health
Descripción: Maritime hub : Blue Economy Innovation Forum, 9-10 de noviembre de 20212022-04-22T09:20:02ZQuè és la normalitat? Cursa cap a la transició energètica i un ús sostenible dels recursos naturals
http://hdl.handle.net/10261/259574
Título: Què és la normalitat? Cursa cap a la transició energètica i un ús sostenible dels recursos naturals
Autor: Turiel, Antonio; Obradors, Xavier; Córdoba, Patricia; Vázquez-Suñé, Enric; Izquierdo, Maria
Resumen: El ritme trepidant d’explotació de recursos dels últims cent anys i la impossibilitat d’incrementar la disponibilitat d’energia d’origen fòssil que sustenta la nostra forma de vida, aboca a un canvi d’era. Podem ara fer alguna cosa per esmorteir les restriccions que vindran? Realment hi ha un problema d’escassetat de recursos? La ciència hi trobarà una solució abans no sigui massa tard? Som massa tecno-optimistes?
Per saber-ne una mica més de tot plegat, saber quins recursos escassegen, què hi diu la ciència, i posar números a l’escassetat de recursos, la Comissió de Sostenibilitat de l‘Institut de Diagnosi Ambiental i Estudis de l’Aigua (IDAEA-CSIC) organitza un seminari presencial amb 3 xerrades d’especialistes sobre futur energètic i els recursos naturals crítics, i una taula rodona
Descripción: Seminari: Què és la normalitat? Cursa cap a la transició energètica i un ús sostenible dels recursos naturals, celebrado el 20 de diciembre de 20212022-02-02T11:48:44ZHow could the largest earthquake in any underground gas storage be induced at Castor?
http://hdl.handle.net/10261/246857
Título: How could the largest earthquake in any underground gas storage be induced at Castor?
Autor: Vilarrasa, Víctor
Resumen: The Underground Gas Storage (UGS) project of Castor, Spain, caused the three largest earthquakes (M4.08, M4.01 and M3.97) ever induced by any of the more than 640 UGS facilities all around the world. Injection of cushion gas, which lasted for 15 days, induced hundreds of seismic events, with the largest earthquakes being felt by the local population despite the platform was located some 20 km off the coast. The project was finally cancelled, implying an investment compensation to the operating company that may cost up to 4.73 billion euros to Spanish citizens. The largest magnitude earthquakes at Castor have the following interesting features: 1) they occurred 20 days after the stop of injection, 2) they nucleated between 4 to 10 km, much deeper than the injection depth, i.e., 1.7 km, and 3) they are the largest ever induced in a UGS. We have proposed a plausible combination of triggering mechanisms that explains these features of the induced seismicity (Vilarrasa et al., 2021). First, gas injection reactivated, through pore pressure buildup and buoyancy, the critically stressed Amposta fault, which bounded the storage formation. The Amposta fault crept even after the stop of injection because of the permanent effect of buoyancy caused by the injected gas. The progressive accumulation of aseismic slip of the Amposta fault eventually reactivated a critically stressed unmapped deep fault through shear slip stress transfer. Once this deep fault was reactivated, the sequence of earthquakes was induced by shear slip stress transfer, with transient deformation-induced pore pressure changes likely controlling the delay between earthquakes. The high risk of inducing seismicity at Castor would have been identified prior to gas injection by analyzing fault stability.2021-07-29T12:21:17ZCastor Project: Chronicle of a Death Foretold
http://hdl.handle.net/10261/246856
Título: Castor Project: Chronicle of a Death Foretold
Autor: Vilarrasa, Víctor
Resumen: Cushion gas injection at the Underground Gas Storage (UGS) project of Castor, Spain, induced hundreds of induced seismic events, including a sequence of felt earthquakes in September-October 2013. The sequence included the three largest earthquakes (M4.08, M4.01 and M3.97) ever induced by any of the more than 640 UGS facilities all around the world. This high-magnitude seismicity ended up with the project cancellation and a subsequent investment compensation to the operating company that may cost up to 4.73 billion euros to Spanish citizens. Yet, the causes of the induced seismicity had not been clarified. We have worked in an interdisciplinary research team combining hydrogeology, geomechanics and seismology to proposed a plausible combination of triggering mechanisms that explains the induced seismicity at Castor (Vilarrasa et al., 2021). Seismicity was initially induced by gas injection, which reactivated through pore pressure buildup and buoyancy the critically stressed Amposta fault. The Amposta fault is a critically stressed fault that has become ductile due to the large slip, 1 km, accumulated in the recent geological history. Thus, reactivation of Amposta fault induced aseismic slip that progressively accumulated due to the buoyancy of the injected gas, which continue to act even after the stop of injection. The accumulated slip perturbed the stress around the rupture area of the fault and caused the reactivation of a critically stressed unmapped fault placed in the crystalline basement. The reactivation of this deep fault induced the sequence of felt earthquakes, which was triggered by shear slip stress transfer and slip-induced pore pressure changes that controlled the timing of the earthquakes. A detailed characterization prior to gas injection, including fault stability analysis, would have identified the high risk of inducing seismicity at Castor.2021-07-29T12:13:53Z