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首页> 美国政府科技报告 >Analysis, comparison, and modeling of radar interferometry, date of surface211 deformation signals associated with underground explosions, mine collapses and 211 earthquakes. Phase I: underground explosions, Nevada Test Site
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Analysis, comparison, and modeling of radar interferometry, date of surface211 deformation signals associated with underground explosions, mine collapses and 211 earthquakes. Phase I: underground explosions, Nevada Test Site

机译：雷达干涉测量的分析，比较和建模，与地下爆炸，矿山坍塌和211次地震相关的地面211变形信号的日期。第一阶段：地下爆炸，内华达试验场

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We have previously presented simple elastic deformation modeling results for211u001ethree classes of seismicevents of concern in monitoring the CTBT underground 211u001eexplosions, mine collapses and earthquakes. Those results explored the 211u001etheoretical detectability of each event type using synthetic aperture radar 211u001einterferometry (InSAR) based on commercially available satellite data. In those 211u001estudies we identified and compared the characteristics of synthetic 211u001einterferograms that distinguish each event type, as well the ability of the 211u001einterferograms to constrain source parameters. These idealized modeling results, 211u001etogether with preliminary analysis of InSAR data for the 1995 mb 5.2 Solvay mine 211u001ecollapse in southwestern Wyoming, suggested that InSAR data used in conjunction 211u001ewith regional seismic monitoring holds great potential for CTBT discrimination 211u001eand seismic source analysis, as well as providing accurate ground truth 211u001eparameters for regional calibration events. In this paper we further examine the 211u001edetectability and discriminating power of InSAR by presenting results from InSAR 211u001edata processing, analysis and modeling of the surface deformation signals 211u001eassociated with underground explosions. Specifically, we present results of a 211u001edetailed study of coseismic and postseismic surface deformation signals 211u001eassociated with underground nuclear and chemical explosion tests at the Nevada 211u001eTest Site (NTS). Several interferograms were formed from raw ERS-1/2 radar data 211u001ecovering different time spans and epochs beginning just prior to the last U.S. 211u001enuclear tests in 1992 and ending in 1996. These interferograms have yielded 211u001einformation about the nature and duration of the source processes that produced 211u001ethe surface deformations associated with these events. A critical result of this 211u001estudy is that significant post-event surface deformation associated with 211u001eunderground nuclear explosions detonated at depths in excess of 600 meters can be 211u001edetected using differential radar interferometry. An immediate implication of 211u001ethis finding is that underground nuclear explosions may not need to be captured 211u001ecoseismically by radar images acquired before and after an event in order to be 211u001edetectable. This has obvious advantages in CTBT monitoring since suspect seismic 211u001eevents-which usually can be located within a 100 kmby 100 km area of an ERS-1/2 211u001esatellite frame by established seismic methods-can be imaged after the event has 211u001ebeen identified and located by existing regional seismic networks.

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