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首页> 外文期刊>Seismological Research Letters >Acquiring Real Time Data from the Broadband Ocean Bottom Seismic Observatory at Monterey Bay (MOBB)
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Acquiring Real Time Data from the Broadband Ocean Bottom Seismic Observatory at Monterey Bay (MOBB)

机译：从蒙特利湾（MOBB）的宽带海底地震观测台获取实时数据

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摘要

Two-thirds of the Earth's surface is covered by oceans, which represents a considerable challenge to investigations of global-scale dynamic processes in the Earth's interior and of tectonic processes at ocean-continent boundaries. Long-term ocean-floor observations are also necessary to better constrain regional tectonics, such as on the western margin of North America where tectonics and seismic activity do not stop at the continental edge. In northern California, for example, the most active seismic zone is near the Mendocino triple junction and is mostly offshore, as are a number of hazardous faults such as the San Gregorio and Hosgri faults and part of the San Andreas fault. Much effort has been expended to deploy networks of seismic stations in the western United States, most recently broadband stations, with the simultaneous goals of monitoring the background seismicity, understanding modes of strain release, documenting seismic hazards, and providing constraints on crustal and upper-mantle structure. However, because there are very few offshore islands in central and northern California, practically all stations are located on the continent. As a consequence, the study of plate-boundary processes, as afforded by regional seismological investigations, is heavily skewed on the continental side of the San Andreas fault (SAF) system. Offshore seismicity is poorly constrained, both in location and in mechanisms, as is crustal structure at the edge of the continent.
机译：地球表面的三分之二被海洋覆盖，这对研究地球内部的全球尺度动态过程以及海洋大陆边界的构造过程构成了巨大挑战。为了更好地约束区域构造，例如在北美的西边缘构造和地震活动不会在大陆边缘停止，长期的海底观测也是必要的。例如，在加利福尼亚州北部，最活跃的地震带位于门多西诺三重交界处附近，并且大多位于近海，还有许多危险断层，例如圣格雷戈里奥和霍斯格里断层以及圣安德烈亚斯断层的一部分。为了在美国西部部署地震台站网（最近是宽带台站），已经付出了很大的努力，其同时目标是监测背景地震活动性，了解应变释放模式，记录地震危险并提供对地壳和上层地震的约束。地幔结构。但是，由于加利福尼亚中部和北部几乎没有离岛，因此几乎所有站点都位于该大陆上。结果，区域地震学调查提供的板块边界过程研究严重偏向圣安德烈亚斯断层（SAF）系统的大陆侧。无论在位置还是在机制上，海上地震活动受到的约束都很有限，大陆边缘的地壳结构也是如此。

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