Seismicity and Structure of Axial Segment; Juan De Fuca Ridge

小行星9711700 这是一个地震研究轴火山和中央JdF山脊使用16个OBBS和4 OBH部署在8个月的时间。 在此期间记录的地震资料将用于研究JdF（1）中部的地壳建造过程，方法是利用地震活动的时间和空间模式和断层面机制来推断应力场的沿着和跨轴变化，并从脆-韧性转换的深度研究热结构。（2）利用地震子波的走时对轴流火山的三维速度结构进行层析反演。

9711700 Webb This is a seismic study of Axial volcano and the central JdF ridge using 16 OBSs and 4 OBHs deployed over an 8-month period. Data from earthquakes recorded during this time will be used to investigate the crust building process on the central JdF (1) by using the temporal and spatial patterns in seismicity and fault-plane mechanisms to infer along and across-axis variations in the stress field and to investigate the thermals tructure fromt he depth of the brittle-ductile transition, and (2) by using the travel times from a subset of the events to perform a tomographic inversion for the 3D velocity structure of Axial volcano.