1984/06/01 by Pei-Shan Chen, Otto W. Nuttli · 1 voice · 1 citation
Earth and Planetary Sciences · #earthquake and tectonic studies #High-pressure geophysics and materials #Earthquake Detection and Analysis
paper · doi:10.1785/bssa0740030957
openalex publication_date 1984/06/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/26
Abstract Intensity data for Chinese earthquakes are used to estimate the body-wave magnitude, mb, of selected historical earthquakes and to estimate Q0, the 1-sec period Q value of Lg waves for various geographical areas of China. In order to derive the necessary empirical relation between the intensity distribution and mb, data are used from recent earthquakes, for which instrumentally obtained mb values as well as isoseismal maps are available. Average Qo values are approximately 175 for the mountainous regions of southwest China, 550 for southeastern China, and 150 for Taiwan. These values agree qualitatively with those obtained by Evernden (1983) and Chen et al. (1983), who utilized a different method of analysis of the intensity data