Characterising seismic hazard with InSAR measurements : cases over large length scales

The work in this thesis is concerned with characterising seismic hazard by determining short-term seismic deformation and long-term crustal displacement using InSAR. The thesis highlights two case studies over large length scales, one showing the interseismic strain accumulation along the Altyn Tagh Fault over a spatial scale of approximately 1500 km, and the other providing the finite fault solution to characterise the coseismic surface deformation field for the 2018 Mw 7.5 Palu earthquake that ruptured around 200 km. The fast and localised interseismic strain accumulation along the Altyn Tagh Fault suggests that the fault is capable of rupturing along its entire length, with the potential for some of the largest earthquakes on the continents. The finite fault solution of the 2018 Mw 7.5 Palu earthquake constrained from geodetic datasets shows that displacements due to coseismic slip are the leading cause of the major tsunami source in and around Palu. Additionally, this thesis shows that a developed spatially varying scaling method for InSAR tropospheric corrections can improve the retrieval of deformation signals from InSAR in different aspects of seismic hazard.