Prof. Manoochehr Shirzaei
Prof. Susanna werth
Dr. Chandrakant Ojhacojha1@asu.edu
Remote sensing of large scale crustal deformation in California due to depletion in water resources
States across southwest USA, in particular California, are currently undergoing a severe drought on large spatial extents, which causes shrinkage of the surface and groundwater resources and severe subsidence on the surface. A comprehensive monitoring schemes to enhance drought management and mitigating the negative impacts at various spatial and temporal scales is an essential. The research effort will focus on acquisition of a high resolution 3D deformation map obtained through InSAR processing of SAR images acquired by various satellites (2003-present) and GPS measurements over the state of California. Results from this project will assess the capabilities of InSAR to monitor aquifer systems and of a combination with GRACE gravity data to acquire high resolution spatiotemporal observations of TWS variations.
|Graduate student and NASA
Megan M. Miller
sensing of land subsidence and hydrological
properties across Arizona
Guang Zhai (Gavin)
Time-dependent deformation source model of Kilauea volcano obtained via InSAR time series and inversion modeling
The Kilauea volcano, Hawaii Island, is one of the most active volcanoes worldwide. Its complex system including magma reservoirs and rift zones, provides a unique opportunity to investigate the dynamics of magma transport and supply. The relatively shallow magma reservoir beneath the caldera stores magma prior to eruption at the caldera or migration to the rift zones. Additionally, the temporally variable pressure in the magma reservoir causes changes in the stress field, driving dike propagation and occasional intrusions at the eastern rift zone. Thus constraining the time-dependent evolution of the magma reservoir plays an important role in understanding magma processes such as supply, storage, transport and eruption.
|Graduate student and NASA
Mechanism of slow slip events on San Andreas fault: constraints from geodesy and seismology
This project focuses on investigating spatial and temporal evolution of fault creep and underlying mechanism on the central San Andreas Fault (CSAF) by using a combination of geodetic and seismic data set through a time-dependent modeling scheme. It will use advanced InSAR imaging to fully explore 3D surface deformation and faulting processes along CSAF. InSAR data from a number of spacecraft with L- and C-band SAR instruments, spanning a period of more than two decades, will be combined with GPS, and seismic data in a rigorous analysis and interpretation effort to improve our understanding of the fault kinematics. We also test several viable hypothesis explaining the causes of fault creep and its rate changes in the form of slow slip events.
sensing and modeling of total water storage
variations in California