Source-Region/Station Time Corrections for the Eastern Himalayan Region.

摘要

Source-region/station time corrections are developed for the eastern Himalayan region and 181 stations, including 48 stations of the World Wide Standard Seismograph Network. The study area encompasses the area within about 15 degrees of 30N 95E and includes the Himalayan front, the Tibetan platform and parts of the Central China fold system, the North China-Korean platform, the Burmese arc, the Indochina fold system, and the South China platform. For teleseismic stations, the median standard deviation of station residuals about their corrections ranges from 0.45 second to 0.83 second for different parts of the region. The very shallow focal depths of earthquakes throughout most of this region limit the usefulness of identification techniques based on computed depth. Focal depths of some earthquakes in the study area, previously reported as radiating anomalously weak surface waves, are not great enough to explain the weak surface wave radiation.