| Sompi谱分析方法在处理数字地震记录中的初步应用 |
| |
| 引用本文： | 陈化然,冯德益.Sompi谱分析方法在处理数字地震记录中的初步应用[J].地震,1995(4):359-364. |
| |
| 作者姓名： | 陈化然 冯德益 |
| |
| 作者单位： | 天津市地震局
中国天津300201(陈化然)，天津市地震局 中国天津300201(冯德益) |
| |
| 摘 要： | 使用数字地震记录，应用Ｓｏｍｐｉ谱分析方法，对１９８９年１月－１９９０年７月发生在唐山地区２０个地震５和１９８８年７月－１９８９年１０月发生在大同周围地区１０个地震波谱进行了分析，从而对１９９０年７月２３日唐山ＭＬ４．９震和４．９地震和１９８９年１０月１９日大同ＭＬ６．１地震Ｐ、Ｓ波频谱异常变化特征进行了研究。所得结果表明：地震前Ｐ、Ｓ波频谱的卓超频率ｆｄ可能呈现出较明显的下降异常变化。
|
| 关 键 词： | 波谱分析 前震 数字地震记录 卓越频率 地震波 |
THE PRELIMINARY APPLICATION OF SOMPI SPECTRAL ANALYSIS METHOD IN PROCESSING DIGITAL SEISMIC WAVE RECORDS |
| |
| Chen Huaran Feng Deyi.THE PRELIMINARY APPLICATION OF SOMPI SPECTRAL ANALYSIS METHOD IN PROCESSING DIGITAL SEISMIC WAVE RECORDS[J].Earthquake,1995(4):359-364. |
| |
| Authors: | Chen Huaran Feng Deyi |
| |
| Institution: | Seismological Bureau of Tianjin |
| |
| Abstract: | By using the digital seismic records and the method of Sompi spectral analysis, the P. S wave spectra of 20 earthquakes occurred in the Tangshan area during January 1989 to July 1990, and 10 earthquakes occurred in the area around Datong during July 1988 to October 1989 had been calculated and analyzed. Then, the anomalous variations in different characteristics of P, S wave spectra before the Tangshan earthquake (ML4.9), July 23, 1990, and the Datong earthquake (ML6.1), October 19, 1989 were studied. The results obtained show that before strong earthquakes the more remarkable decrease-type anomalous variations may be discovered in the domminant frequency fd of P, S wave spectra . Therefore, it may become an useful index for earthquake prediction, the precursory anomalous times of the 3-direction components ( SN, EW and UD) are basically synchronous and consitent with the perk frequency fm of power spectra calculated based on correlated functions, and the dominant frequency fd of S wave of foreshocks are obviously smaller, so they may be used as an important index for recognition of foreshocks. |
| |
| Keywords: | Spectral analysis Foreshock Digital seismic records Dominant frequency |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
