Speakers: Dr. Yujie Zheng, Postdoctoral Scholar, Seismological Laboratory, California Institute of Technology, Pasadena, California, USA
Seminar Title: Monitoring and Understanding Earth’s Surface Changes with Space-borne Imaging Radar
Over the last decade, Interferometric Synthetic Aperture Radar (InSAR) has grown from opportunistic science to a routine monitoring tool, transforming our understanding of earthquakes, tectonics, and volcanism. The rapid growth of InSAR data has also led to increasing awareness of the impacts of human activities such as the extraction/injection of hydrocarbon or groundwater in aquifers. In the first part of my talk, I will show how we can employ modern InSAR datasets to retrieve mm-level ground deformation related to Cascadia slow slip events (SSEs) and solve the slip distribution at depth. In the second part of my talk, I will show how we can constrain magma chamber volume at Sierra Negra, Galápagos, by combining GPS, InSAR, melt inclusions, and lava fountain height. I will then discuss the onlook of InSAR as an essential tool in monitoring and mitigating the impacts of anthropogenic sources of ground motion.
Host: Professor C K Shum
Zoom Meeting information
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