Mapping Magma Chambers and Asperities by B-Values

[902717 . wyss]这个项目的目的是：1)通过b值异常进一步绘制重要火山下的岩浆房；2)检验断层上异常低的b值体积或“局部重现时间”的最小值可能绘制出最有可能产生主震的位置的假设。先前的工作，制作了三维的b值变化图，表明b值（在地震频率-震级分布中定义的）作为空间的函数（从0.5到2.5）变化强烈，有时作为时间的函数。该项目将继续在两个方面推进这项研究，绘制火山岩浆房和绘制加利福尼亚、犹他州、希腊和日本断裂带的岩石，利用从以前的研究中获得的工具和经验。

9902717WyssThis project is to 1) to map further magma chambers underneath important volcanoes by b-value anomalies, and 2) to test the hypothesis that anomalously low b-value volumes, or minima in "local recurrence time", on faults may map the locations most likely to generate main shocks. Previous work, which produced maps of b-value variations in 3-D, has shown that b values (as defined in an earthquake frequency-magnitude distribution) vary strongly as a function of space (from 0.5 to 2.5) and sometimes as a function of time. This project will continue to advance this research on two fronts, mapping magma chambers at volcanoes and mapping asperities in fault zones in California, Utah, Greece, and Japan using the tools and experience obtained from previous studies.