@article{CescaGrigoliHeimannetal.2014,
  author    = {Cesca, Simone and Grigoli, Francesco and Heimann, Sebastian and Gonzalez, Alvaro and Buforn, Elisa and Maghsoudi, Samira and Blanch, Estefania and Dahm, Torsten},
  title     = {The 2013 September-October seismic sequence offshore Spain: a case of seismicity triggered by gas injection?},
  series = {Geophysical journal international},
  volume    = {198},
  journal   = {Geophysical journal international},
  number    = {2},
  publisher = {Oxford Univ. Press},
  address   = {Oxford},
  issn      = {0956-540X},
  doi       = {10.1093/gji/ggu172},
  pages     = {941 -- 953},
  year      = {2014},
  abstract  = {A spatially localized seismic sequence originated few tens of kilometres offshore the Mediterranean coast of Spain, close to the Ebro river delta, starting on 2013 September 5, and lasting at least until 2013 October. The sequence culminated in a maximal moment magnitude M-w 4.3 earthquake, on 2013 October 1. The most relevant seismogenic feature in the area is the Fosa de Amposta fault system, which includes different strands mapped at different distances to the coast, with a general NE-SW orientation, roughly parallel to the coastline. However, no significant known historical seismicity has involved this fault system in the past. The epicentral region is also located near the offshore platform of the Castor project, where gas is conducted through a pipeline from mainland and where it was recently injected in a depleted oil reservoir, at about 2 km depth. We analyse the temporal evolution of the seismic sequence and use full waveform techniques to derive absolute and relative locations, estimate depths and focal mechanisms for the largest events in the sequence (with magnitude mbLg larger than 3), and compare them to a previous event (2012 April 8, mbLg 3.3) taking place in the same region prior to the gas injection. Moment tensor inversion results show that the overall seismicity in this sequence is characterized by oblique mechanisms with a normal fault component, with a 30A degrees low-dip angle plane oriented NNE-SSW and a subvertical plane oriented NW-SE. The combined analysis of hypocentral location and focal mechanisms could indicate that the seismic sequence corresponds to rupture processes along shallow low-dip surfaces, which could have been triggered by the gas injection in the reservoir, and excludes the activation of the Amposta fault, as its known orientation is inconsistent with focal mechanism results. An alternative scenario includes the iterated triggering of a system of steep faults oriented NW-SE, which were identified by prior marine seismics investigations.},
  language  = {en}
}
@article{HeimannGonzalezWangetal.2013,
  author    = {Heimann, Sebastian and Gonzalez, Alvaro and Wang, Rongjiang and Cesca, Simone and Dahm, Torsten},
  title     = {Seismic characterization of the Chelyabinsk Meteor's terminal explosion},
  series = {Seismological research letters},
  volume    = {84},
  journal   = {Seismological research letters},
  number    = {6},
  publisher = {Seismological Society of America},
  address   = {Albany},
  issn      = {0895-0695},
  doi       = {10.1785/0220130042},
  pages     = {1021 -- 1025},
  year      = {2013},
  language  = {en}
}
@article{BerrahSanchezGonzalezJureketal.2019,
  author    = {Berrah, N. and S{\´a}nchez-Gonz{\´a}lez, {\´A}lvaro and Jurek, Zoltan and Obaid, Razib and Xiong, H. and Squibb, R. J. and Osipov, T. and Lutman, A. and Fang, L. and Barillot, T. and Bozek, J. D. and Cryan, J. and Wolf, T. J. A. and Rolles, Daniel and Coffee, R. and Schnorr, Kirsten and Augustin, S. and Fukuzawa, Hironobu and Motomura, K. and Niebuhr, Nina Isabelle and Frasinski, L. J. and Feifel, Raimund and Schulz, Claus-Peter and Toyota, Kenji and Son, Sang-Kil and Ueda, K. and Pfeifer, T. and Marangos, J. P. and Santra, Robin},
  title     = {Femtosecond-resolved observation of the fragmentation of buckminsterfullerene following X-ray multiphoton ionization},
  series = {Nature physics},
  volume    = {15},
  journal   = {Nature physics},
  number    = {12},
  publisher = {Nature Publ. Group},
  address   = {London},
  issn      = {1745-2473},
  doi       = {10.1038/s41567-019-0665-7},
  pages     = {1279 -- 1301},
  year      = {2019},
  abstract  = {X-ray free-electron lasers have, over the past decade, opened up the possibility of understanding the ultrafast response of matter to intense X-ray pulses. In earlier research on atoms and small molecules, new aspects of this response were uncovered, such as rapid sequences of inner-shell photoionization and Auger ionization. Here, we studied a larger molecule, buckminsterfullerene (C-60), exposed to 640 eV X-rays, and examined the role of chemical effects, such as chemical bonds and charge transfer, on the fragmentation following multiple ionization of the molecule. To provide time resolution, we performed femtosecond-resolved X-ray pump/X-ray probe measurements, which were accompanied by advanced simulations. The simulations and experiment reveal that despite substantial ionization induced by the ultrashort (20 fs) X-ray pump pulse, the fragmentation of C-60 is considerably delayed. This work uncovers the persistence of the molecular structure of C-60, which hinders fragmentation over a timescale of hundreds of femtoseconds. Furthermore, we demonstrate that a substantial fraction of the ejected fragments are neutral carbon atoms. These findings provide insights into X-ray free-electron laser-induced radiation damage in large molecules, including biomolecules.},
  language  = {en}
}