Resolution of non-double-couple components in the seismic moment tensor using regional networks-I: a synthetic case study

0430236 - GFÚ 2015 RIV GB eng J - Článek v odborném periodiku
Stierle, E. - Vavryčuk, Václav - Šílený, Jan - Bohnhoff, M.
Resolution of non-double-couple components in the seismic moment tensor using regional networks-I: a synthetic case study.
Geophysical Journal International. Roč. 196, č. 3 (2014), s. 1869-1877. ISSN 0956-540X. E-ISSN 1365-246X
Grant CEP: GA ČR(CZ) GAP210/12/1491; GA ČR GAP210/12/2235
Institucionální podpora: RVO:67985530
Klíčová slova: inverse theory * numerical approximations and analysis * earthquake source observations * theoretical seismology
Kód oboru RIV: DC - Seismologie, vulkanologie a struktura Země
Impakt faktor: 2.560, rok: 2014

We perform a detailed synthetic study on the resolution of non-double-couple (non-DC) components in the seismic moment tensors from short-period data observed at regional networks designed typically for monitoring aftershock sequences of large earthquakes. In addition, we test two different inversion approaches-a linear full moment tensor inversion and a non-linear moment tensor inversion constrained to a shear-tensile source model. The inversions are applied to synthetic first-motion P- and S-wave amplitudes, which mimic seismic observations of aftershocks of the 1999 M-w = 7.4 Izmit earthquake in northwestern Turkey adopting a shear-tensile source model. To analyse the resolution capability for the obtained non-DC components inverted, we contaminate synthetic amplitudes with random noise and incorporate realistic uncertainties in the velocity model as well as in the hypocentre locations.
Trvalý link: http://hdl.handle.net/11104/0235131