Cooperative Institute for Research in Environmental Sciences

Tibet surface wave seismology > Figure 2.

Figure 2. Evidence for ongoing crustal thinning from earthquakes. The distribution of the normalized component component of seismic moment tensors across (Here represents the component of the moment tensor that quantifies the vertical extensional strain of the crust (a negative value means crustal thinning) and describe the north-south and east-west horizontal extension associated with an earthquake. Earthquakes contributing to crustal thinning ( are shown with red circles, and those corresponding to crustal thickening () are shown with the blue circles. White circles denote earthquakes for which is small. Light red shading shows areas where earthquakes with are detected within a 200-km radius, and no earthquakes with are detected in the same area. Light blue shading and no events with The green line is the ray path for the seismic records shown in Figure 1 of Shapiro et al. [2004]).