@article{DonnerGhodsKrueeretal.2015,
  author    = {Donner, Stefanie and Ghods, Abdolreza and Kr{\"u}er, Frank and R{\"o}ßler, Dirk and Landgraf, Angela and Ballato, Paolo},
  title     = {The Ahar-Varzeghan Earthquake Doublet (M-w 6.4 and 6.2) of 11 August 2012: Regional Seismic Moment Tensors},
  series = {Bulletin of the Seismological Society of America},
  volume    = {105},
  journal   = {Bulletin of the Seismological Society of America},
  number    = {2A},
  publisher = {Seismological Society of America},
  address   = {Albany},
  issn      = {0037-1106},
  doi       = {10.1785/0120140042},
  pages     = {791 -- 807},
  year      = {2015},
  abstract  = {On 11 August 2012 an earthquake doublet (M-w 6.4 and 6.2) occurred near the city of Ahar, northwest Iran. Both events were only 6 km and 11 minutes apart, producing a surface rupture of about 12 km in length. Historical and modern seismicity has so far been sparse in this area. Spatially, the region represents a transitional zone between different tectonic domains, including compression in Iran, westward extrusion of the Anatolian plate, and thrusting beneath the Caucasus. In this study, we inverted the surface waveforms of the two mainshocks and 11 aftershocks (M-w >= 4.3) to obtain regional seismic moment tensors. The earthquakes analyzed can be grouped into pure strike slip (including the first mainshock) and oblique reverse mechanisms (including the second mainshock). The sequence provides information about faulting mechanisms at the spatial scale of the entire rock volume affected by the earthquake doublet, including coinciding deformation on minor faults (sub) parallel to the main fault and Riedel shears. It occurred on a so far unknown fault structure, which we call the Ahar fault. Alongside the seismological data, we used geological maps, satellite images, and digital elevation data to analyze the geomorphology of the region. Our analysis suggests that the adjacent North Tabriz fault, which accomodates up to 7 mm/yr of right-lateral strike-slip faulting, does not compensate the entire lateral shear strain, and that part of it is compensated farther north. Combined, our results suggest a temporally and spatially complex style of deformation (reverse and strike slip) overprinting older reverse deformation.},
  language  = {en}
}
@misc{DonnerRoesslerStreckeretal.2009,
  author    = {Donner, Stefanie and R{\"o}ßler, Dirk and Strecker, Manfred and Landgraf, Angela and Ballato, Paolo},
  title     = {Erweiterte Momententensorinversion und ihre seismotektonische Anwendung : Elbursgebirge, Nordiran},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-29308},
  year      = {2009},
  abstract  = {Der Elburs im Norden Irans ist ein durch die Konvergenz der Arabischen und Eurasischen Platte verursachtes doppelt konvergentes Gebirge. Das komplexe System von Blattverschiebungen und {\"U}berschiebungen sowie die Aufnahme der Deformation im Elburs ist noch nicht sehr gut verstanden. Eine neu zu entwicklende Methode zur Inversion von seismischen Momententensoren, die unterschiedliche Beobachtungen verschiedener Stationstypen kombiniert invertiert, soll die bisher haupts{\"a}chlich strukturelle/geomorphologische Datengrundlage um Momententensoren auch kleinerer Magnituden (M < 4.5) erweitern. Dies ist die notwendige Grundlage f{\"u}r detaillierte seismotektonische Studien, die wiederum die Basis f{\"u}r seismische Gef{\"a}hrdungsanalysen bilden.},
  language  = {de}
}
@misc{DonnerStreckerRoessleretal.2009,
  author    = {Donner, Stefanie and Strecker, Manfred and R{\"o}ßler, Dirk and Ghods, Abdolreza and Kr{\"u}ger, Frank and Landgraf, Angela and Ballato, Paolo},
  title     = {Earthquake source models for earthquakes in Northern Iran},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-32581},
  year      = {2009},
  abstract  = {The complex system of strike-slip and thrust faults in the Alborz Mountains, Northern Iran, are not well understood yet. Mainly structural and geomorphic data are available so far. As a more extensive base for seismotectonic studies and seismic hazard analysis we plan to do a comprehensive seismic moment tensor study also from smaller magnitudes (M < 4.5) by developing a new algorithm. Here, we present first preliminary results.},
  language  = {en}
}