GPS Transient Detection
Faults in all tectonic enviornments often accumulate a large amount of plate motion by sliding without earthquakes. This aseismic slip is detectable with geodetic data and often provides direct clues to the mechanical properties of the fault. It may also play a large role in triggering earthquakes. We use both continuious GPS and InSAR data to detect and analyze aseismic slip on fault systems. The figures on the right show the detection of the equivalent of a Magnitude 7 earthquake that happened aseismically in the ~48 hours before the devastating M9 Tohoku earthquake in March 2011. Understanding the role of aseismic slip events such as this one in earthquake triggering is extremely important for real-time hazard mitigation.
Matt Wei (WHOI)
Shin'ichi Miyazaki (Kyoto Univ)
Paul Segall (Stanford Univ)
Rowena Lohman (Cornell Univ)