The Monterey Bay broadband ocean bottom seismic observatory
The Monterey Bay broadband ocean bottom seismic observatory
复制标题
蒙特利湾宽带海底地震观测站
DOI：
10.4401/ag-3132
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发表时间：
2006
影响因子：
1
通讯作者：
T. Ramirez
中科院分区：
文献类型：
--
作者：
B. Romanowicz;D. Stakes;D. Dolenc;D. Neuhauser;P. McGill;R. Uhrhammer;T. Ramirez
我们报告了在美国加利福尼亚州蒙特利湾离岸 40 公里、水深 1000 m 处安装的长期埋藏海底宽带地震台 (MOBB) 的情况。该站于 2002 年 4 月由蒙特利湾水族馆研究所 (MBARI) 和伯克利地震实验室 (BSL) 合作，使用船舶和 ROV 安装。该站位于圣格雷戈里奥断层的西侧，该断层是圣安德烈亚斯板块边界断层系统的主要断层。除了 3 组件 CMG-1T 地震计套件外，该站还包括一个海流计和差压计，两者都以足够高的频率（1 Hz）采样，以便研究地震计上的背景噪声与海浪和海流之间的关系。伯克利数字地震台网的几个陆基宽带地震台的邻近位置可以对与区域和远震研究相关的时期的陆地/海洋背景地震噪声进行深入的比较。该站目前是自治的。在预定的一日潜水期间，每 3 个月更换一次记录和电池包。最终，该站将通过连续遥测（电缆和/或浮标）与海岸相连，并将为北加州的地震通知系统做出贡献。我们提供了 MOBB 运行前 6 个月期间记录的地震和噪声数据的示例。从这些和持续记录中吸取的教训将有助于了解区域近海环境中背景噪声的性质和特征，并为未来近海临时和永久宽带地震台的安装提供参考。
We report on the installation of a long-term buried ocean-floor broadband seismic station (MOBB) in Monterey Bay, California (U.S.A.), 40 km off-shore, at a water depth of 1000 m. The station was installed in April 2002 using a ship and ROV, in a collaborative effort between the Monterey Bay Aquarium Research Institute (MBARI) and the Berkeley Seismological Laboratory (BSL). The station is located on the western side of the San Gregorio Fault, a major fault in the San Andreas plate boundary fault system. In addition to a 3-component CMG-1T seismometer package, the station comprises a current meter and Differential Pressure Gauge, both sampled at high-enough frequency (1 Hz) to allow the study of relations between background noise on the seis- mometers and ocean waves and currents. The proximity of several land-based broadband seismic stations of the Berkeley Digital Seismic Network allows insightful comparisons of land/ocean background seismic noise at pe- riods relevant to regional and teleseismic studies. The station is currently autonomous. Recording and battery packages are exchanged every 3 months during scheduled one day dives. Ultimately, this station will be linked to shore using continuous telemetry (cable and/or buoy) and will contribute to the earthquake notification sys- tem in Northern California. We present examples of earthquake and noise data recorded during the first 6 months of operation of MOBB. Lessons learned from these and continued recordings will help understand the nature and character of background noise in regional off-shore environments and provide a reference for the installa- tion of future off-shore temporary and permanent broadband seismic stations.