Earth and Planetary Science
EPS Planetary Science

Evidence of Fault Immaturity from Shallow Slip

Friday, January 17, 2020
Five Flower Lake, Jiuzhaigou Valley Scenic and Historic Interest Area (Wikepedia image)

Evidence of Fault Immaturity from Shallow Slip

On 8 August 2017, an Mw6.5 earthquake shook the scenic Jiuzhaigou County in Sichuan, China. Yuexin Li (EPS graduate student), Roland Bürgmann (EPS Professor), and Bin Zhao (EPS postdoc) studied the co- and postseismic deformation caused by the earthquake using InSAR and GPS. The slip model indicates a large shallow slip deficit with ~1.2m peak slip at ~5km depth. The shallow slip deficit and lack of afterslip suggest shallow distributed failure in young strike-slip faults.  Click here for their paper, published in the Bulletin of the Seismological Society of America.