| 地震波动力学特征变化指标在短期地震预报中的应用 |
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| 引用本文： | 冯德益,虞雪君.地震波动力学特征变化指标在短期地震预报中的应用[J].地震,1994(1):12-22. |
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| 作者姓名： | 冯德益 虞雪君 |
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| 作者单位： | 天津市地震局，天津市地震局，天津市地震局，天津市地震局，浙江省地震局，上海市地震局 中国天津 300201，中国天津 300201，中国天津 300201，中国天津 300201，中国杭州 310007，中国上海 200062 |
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| 摘 要： | 本文研究了地震前地震波动力学特征的变化，主要是波形和频谱的变化，并从中提取出可望在短期（半年以内）地震预报中应用的一些预报指标。这些指标包括：Ｐ波初始部分波形的时间线性度和空间线性度，初始段平均半周期，Ｓ，Ｐ波频谱的峰值频率，拐角频率，相对带宽度，相对频谱峰值，高频段的谱线斜率绝对值等。同时还研究了短周期地脉动的波形线性度及频谱特征量（峰值频率等）在大震前出现的短期（半年以内）和临震（９天以内）的
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| 关 键 词： | 地震预报 地震波 动力学 变化指标 |
APPLICATION OF VARIATION INDEX OF SEISMIC WAVE CHARACTERISTICS TO SHORT-TERM EARTHQUAKE PREDICTION |
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| Feng Deyi Wu Guoyou Chen Huaran Guo Ruizhi.APPLICATION OF VARIATION INDEX OF SEISMIC WAVE CHARACTERISTICS TO SHORT-TERM EARTHQUAKE PREDICTION[J].Earthquake,1994(1):12-22. |
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| Authors: | Feng Deyi Wu Guoyou Chen Huaran Guo Ruizhi |
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| Institution: | Feng Deyi Wu Guoyou Chen Huaran Guo Ruizhi(Seismological Bureau of Tianjin)Yu Xuejun(Seismlogical Bureau of Zhefang Province)Ding Weiguo (Seismological Bureau of Shanghai) |
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| Abstract: | The variations of dynamic characteristics, mainly the form and spectrum pf seismic waves before large earthquakes have been studied, and some prediction indices among which, some may be prospective in application to short-term(within half year) earthquake prediction, are found. These indices include: temporal and spatial linearity of wave form of initial part of S,P wave, its average half-period, the peak frequency, corner frequency, relative width of frequency domain, relative value of peak spectrum and the absolute slope value of high frequencies.At same time, it also analysed short-term(half year) and impending(9 days) precursory variations of linearity and spectral characeristics of short-term microseism waveform. And found precursory variations of linearity and spectral characteristics,average half-period,peak frequency,maximum frequency, corner frequency is obvious. Therefore, they may be considered as the indices for short-term and impending earthquake prediction.All the prediction indices of dynamic characteristics variation of seismic waves given in this paper are checked through Gonghe MS6.9 earthquake on April 26, 1990; Datong As6.1 earthquake on Oct. 19, 1989; Changshu MS5.1 earthquake on Feb 9, 1990 and some moderate earthquakes with MS4.5 occurred in recent years in Tangshan region,and partly through the Haicheng earthquake AS7.3 in 1975 and Tangshan earthquake MS7.8 in 1976. |
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| Keywords: | analysis of seismis waveform temporal and spatial linearity frequency characteristics of seismic wave spectrum short period microseism short- term and impending earthquake prediction |
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