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Coseismic interferograms of two M S =6.6 earthquakes in the South Iceland Seismic Zone, June 2000
Author(s) -
Pedersen Rikke,
Sigmundsson Freysteinn,
Feigl Kurt L.,
Árnadóttir Thóra
Publication year - 2001
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2001gl013235
Subject(s) - geology , seismology , aftershock , seismogram , interferometric synthetic aperture radar , slip (aerodynamics) , geodesy , seismic moment , fault (geology) , synthetic aperture radar , physics , remote sensing , thermodynamics
We present InSAR observations of deformation due to two M S =6.6 earthquakes in the South Iceland Seismic Zone in June 2000. Coseismic deformation predominates in the ERS interferograms. Range change, due to mainly right‐lateral strike‐slip on N‐S striking faults, amounting to more than 15 cm is observed, although displacement is mainly perpendicular to the satellite look direction. Using elastic dislocation models in a trial‐and‐error scheme, we find a best‐fitting model that agrees well with the aftershock locations and moment magnitudes estimated from seismograms. The June 17 model has a fault patch 16 km long, 10 km deep, striking N05°E, dipping 86°, with a slip maximum of 2.40 m. The June 21 model has a vertical patch 15 km long, 9 km deep, striking N01°W, with a slip maximum of 2.15 m.