Seismicity and Structure of Axial Segment; Juan De Fuca Ridge

9711700 Webb这是对轴向火山和JDF中央海脊的地震研究，使用了在8个月内部署的16个OBS和4个OBH。在此期间记录的地震数据将被用来研究JDF中心的地壳形成过程：(1)利用地震活动的时间和空间模式和断层-平面机制，推断应力场的沿轴和跨轴变化，并从脆韧性转变的深度研究热结构；(2)利用事件子集的旅行时间对轴向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.