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Identification of Low-Active Fractures in Platforms Using Nanoseismic Technology

机译：利用纳米地震技术识别平台中的低活动裂缝

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A new seismic technology is presented based on the identification of endogenous events from microseisms. The energy of these events is 10~(-9) of that of earthquakes observed at standard seismic stations, i.e., seismic events with magnitudes M up to ～ -4 or -5. Based on the analysis of statistics for such nanoseismic manifestations recorded in the course of field works in the Arkhangelsk region, we demonstrated the possibility of distinguishing low-active fractures on platform territories. Three-component short-period observations (up to 3 h) are needed to obtain the results. They allow us to estimate quantitative characteristics of seismoactive medium in the neighborhood of 1-3 km around the point of recording. Mapping of the activity of the territory is based on the calculation of the coherence function for the records, whose statistical analysis allows us to obtain an analog of the earthquake recurrence plot for the range of microseismic and nanoseismic events. In addition to the methodological aspect, we have experimentally demonstrated for the first time the presence of endogenous nanoseismic manifestations (nanoearthquakes), which had previously been predicted only theoretically.
机译：基于对微震内生事件的识别，提出了一种新的地震技术。这些事件的能量是在标准地震台站观测到的地震能量的10〜（-9），即，震级M高达〜-4或-5的地震事件。根据对阿尔汉格尔斯克地区野外工作过程中记录的此类纳米地震表现的统计分析，我们证明了区分平台区域低活动裂缝的可能性。需要三部分短期观察（长达3小时）才能获得结果。他们使我们能够估计记录点周围1-3公里附近的地震介质的定量特征。领土活动的制图基于记录的相干函数的计算，其统计分析使我们能够获得针对微震和纳震事件范围的地震复发图的类似物。除了方法论方面，我们还通过实验首次证明了以前仅在理论上预测过的内源性纳米地震表现（纳米地震）的存在。

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