Seismicity and Tremor in a Submarine Hydrothermal Vent Field

1988年夏天，首席调查员在胡安德富卡山脊奋进段的热液喷口及其附近测量了微震活动。一个非常令人惊讶的结果是观测到了大量(数百次)地震事件。首席调查员认为他第一次观测到了与海底热液场有关的长时间震动。这些事件的大量和不同寻常的性质使这一数据集独一无二。首席调查员将：1)为尽可能多的事件构建事件数目与相对震级的关系曲线；2)描述事件的频谱；3)分析事件的时间变异性，并与活动的热液烟囱附近的高频数据进行比较。

In the summer of 1988 the principal investigator measured microseismicity in and near the hydrothermal vent field of the Endeavor segment of the Juan de Fuca Ridge. A very surprising result was the large number (hundreds) of seismic events that were observed. The principal investigator thinks he has made the first observation of long duration tremor associated with a submarine hydrothermal field. The large number and unusual nature of these events make this data set unique. The principal investigator will: 1) construct a number-of-events vs. relative magnitude curve for as many events as possible; 2) characterize the spectra of the events; and 3) analyze the time variability of the events and compare with high-frequency data from near an active hydrothermal chimney.