We used records of 36 earthquakes, choosing only events near to
the array (~300–900 km source–receiver distance) in order to minimize
the effects of path averaging. A dispersion curve represents average velocities over the length of the source–receiver path, so short paths provide greater spatial resolution than long paths. However, these paths were still long enough to be representative of the regional crust, so the criticism (e.g. Harrison, 2006) that geophysical studies in southern Tibet providing evidence in support of channel flow were located in anomalous rift valleys does not apply here. The seismicity of the region was not evenly spatially distributed: during the deployment,a large concentration of events occurred northwest of the array near the Nanga Parbat syntaxis (Fig. 1b).
We used records of 36 earthquakes, choosing only events near tothe array (~300–900 km source–receiver distance) in order to minimizethe effects of path averaging. A dispersion curve represents average velocities over the length of the source–receiver path, so short paths provide greater spatial resolution than long paths. However, these paths were still long enough to be representative of the regional crust, so the criticism (e.g. Harrison, 2006) that geophysical studies in southern Tibet providing evidence in support of channel flow were located in anomalous rift valleys does not apply here. The seismicity of the region was not evenly spatially distributed: during the deployment,a large concentration of events occurred northwest of the array near the Nanga Parbat syntaxis (Fig. 1b).
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