Extreme Ground Motion Recorded in the Near-Source Region of Underground Nuclear Explosions.

[摘要] Free-field recordings of underground nuclear explosions constitute a unique data set within the near-source region of seismic events ranging in magnitude from M3 to M6.5. The term 'free-field' in this context refers to recordings from instruments emplaced in boreholes or tunnel walls such that the initial portions of the records (approx. 0.1 to 1 second) do not contain effects resulting from reflections at the free surface. In addition to the free-field instruments deployed to record ground motions from selected underground nuclear explosions at the Nevada Test Site (NTS) and elsewhere, surface arrays were routinely deployed to record surface accelerations and velocities from underground nuclear tests conducted at NTS. In this paper we provide an overview of the types of data recorded during the U.S. underground nuclear testing program and their availability, and briefly discuss potential uses of the data in investigating the limits on ground motions generated by earthquakes.

[发布机构] Technical Information Center Oak Ridge Tennessee

[学科分类] 工程和技术（综合）

[关键词] Nuclear explosions;Underground explosions;Ground motion;Wave propagation;Attenuation