Publication Date:
2017-06-21
Description:
The amplitude asymmetry and initial polarity of seismic induced ionospheric perturbations around the epicenter are considered to be important in providing information about the rupture propagation and related vertical surface deformation. To comprehend this, we study ionospheric perturbations related to the 12 May 2015, M w 7.3 Nepal earthquake. We model the co-seismic slip associated with the event using the InSAR derived surface deformation data. The ionospheric perturbations associated with the obtained surface deformation are explained in terms of rupture propagation, favorable geomagnetic field-wave coupling and satellite geometry effects. We discuss the effects of phase cancellation on the perturbation evolution for various receiver satellite line-of-sight configurations invoking an elementary version of satellite geometry factor (SGF). The present study thus elucidates further the role of non-tectonic forcing mechanisms while identifying ground source pattern using the associated ionospheric perturbations.
Print ISSN:
0148-0227
Topics:
Geosciences
,
Physics
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