Acoustic Extensometer (PHASE 1): A Seafloor Observatory Experiment

该项目将开始对胡安·德富卡海脊南裂段的海底应变进行长期测量。 测量将由称为声学扩展仪的仪器阵列完成，这些仪器通过精确记录声学脉冲的往返行程时间来测量与相邻仪器的距离。 在这一概念验证阶段，将在第一个野外季节使用一个100-200米的间隔安装一个由12个仪器组成的1.4公里阵列。 在第二和第三个野外季节，将从一艘水面船只上检索数据。

This project will initiate long-term measurements of seafloor strain on the south Cleft segment of the Juan de Fuca Ridge. The measurements will be accomplished by arrays of instruments called acoustic extensionmeters that measure distances to neighboring instruments by precisely recording the round trip travel time of acoustic pulses. In this proof-of-concept phase, one 1.4 km array of 12 instruments will be installed at 100-200 m intervals using an ROV during the first field season. During the second and third field seasons data will be retrieved from a surface ship.