Estimation of Seismic Detection Thresholds
Estimation of Seismic Detection Thresholds
复制标题
地震探测阈值的估计
DOI：
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复制
发表时间：
1974
期刊：
影响因子：
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通讯作者：
F. Ringdal
中科院分区：
文献类型：
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作者：
F. Ringdal
摘要：本报告讨论了估计地震台增量探测能力的一般问题，即作为事件震级函数的探测概率。引入最大似然程序通过与独立参考站或网络进行比较来估计站检测阈值。计算估计参数的近似置信限。通过这种（直接）方法获得的结果与通过应用天然地震活动的指数震级-频率关系得出的估计值进行比较。结果发现，后一种（间接）方法通常给出显着较低的 90% 检测阈值。结论是，如果有良好的参考系统，直接方法将产生比间接方法更可靠的估计。
Abstract : This report deals with the general problem of estimating the incremental detection capability of a seismic station, i.e., the probability of detection as a function of event magnitude. A maximum likelihood procedure is introduced to estimate the station detection thresholds by comparison with an independent reference station or network. Approximate confidence limits for the estimated parameters are computed. The results obtained by this (direct) method are compared to estimates derived from applying the exponential magnitude- frequency relationship of natural seismicity. It is found that the latter (indirect) method in general gives significantly lower 90 percent detection thresholds. It is concluded that, if a good reference system is available, the direct method will produce estimates that are more reliable than those provided by the indirect method.