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Lithospheric deformation due to the 2015 M7.2 Sarez (Pamir) earthquake constrained by 5 years of space geodetic observations
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  • Yuri Fialko,
  • Zeyu Jin,
  • Alexander Zubovich,
  • Tilo Schöne
Yuri Fialko
University of California San Diego

Corresponding Author:[email protected]

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Zeyu Jin
University of California San Diego
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Alexander Zubovich
Central-Asian Institute for Applied Geosciences
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Tilo Schöne
Helmholtz Centre Potsdam GFZ
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Abstract

Key Points: • We present geodetic observations of coseismic and postseismic deformation due to the 2015 M w 7.2 Sarez (Pamir) earthquake. • Near-field postseismic deformation is dominated by shallow afterslip and possibly poroelastic relaxation at the NE end of the earthquake rupture. • Data do not show a clear signal expected of viscoelastic relaxation, indicating effective viscosity of the lower crust > 10 19 Pa s. • We investigate triggering relationships between the M7.2 earthquake and a pair of M6+ events that occurred within 1 year and 100 km of the mainshock.