论文部分内容阅读
新研制的抗干扰高精度PS100大地电测仪器系统,在中国川滇地区的台站上记录到印尼MW9.0海啸地震的地电前兆。本文将分析论证地电前兆的波动特性,特别是其传播规律。在印尼地震前约3个月开始出现周期等于潮汐力周期(如MSf、K1、M2等)、振幅异常增大的地电潮汐力谐振波(Harmonie waves driven by tidal frces,简称HT波);地震前2天(北京时2004年12月24日10时)出现地电潮汐力共振波(Resonancewaves driven by tidal frces,简称RT波)。RT波有纵波和横波,初步确定纵波速度Vl≈307 km/h;横波速度Vt≈126 km/h,是一种在地壳多孔岩石孔隙流体中传播的声波。其固有振动周期T0=4~5 h;其振幅很大达2.9%(超出观测标准偏差17倍),异常极为显著;峰值异常尖锐,Q≈8.3。与地震同时从震源发出的RT波为断层破裂所激发,故推断地震前2天所出现的RT波系MW9.0地震震源区断层前期破裂所致。在可预见的将来,根据震前RT波出现的时间,台站所记纵、横波的到时差及T0,对强震在震前1~3天定量预测其三要素(如果有一布设合理的PS100台网)是可能的。
The newly developed anti-interference high-precision PS100 geo-electrical instrumentation system recorded the geoelectric precursors of Indonesia’s MW9.0 tsunami earthquake on the stations in China’s Sichuan-Yunnan region. This article will analyze and demonstrate the volatility characteristics of geoelectric precursors, especially their propagation laws. About 3 months before the Indonesian earthquake, the earthquakes (Harmonics waves driven by tidal frces) with periodic anomalies of magnitude equal to tidal force cycles (such as MSf, K1, M2, etc.) The first two days (Beijing at 12 o’clock on December 24, 2004) appeared in the tidal wave resonance (Resonancewaves driven by tidal frces, referred to as RT wave). The RT waves have longitudinal and shear waves. The initial P-wave velocity Vl≈307 km / h and the transverse wave velocity Vt≈126 km / h are sound waves propagating in the porous fluid in the crustal porous rock. Its natural vibration period is T0 = 4 ~ 5 h; its amplitude is as high as 2.9% (exceeding 17 times of the standard deviation of observation), and the anomaly is extremely significant; the peak is extremely sharp and Q≈8.3. The RT wave sent from the source at the same time as the earthquake is excited by the fault rupture. Therefore, it is deduced that the rupture of the fault occurred in the focal region of MW9.0 of the RT wave system during the first 2 days of the earthquake. In the foreseeable future, based on the time of pre-earthquake RT wave occurrence, the time difference between vertical and transverse waves recorded by stations, and T0, the three elements of quantitative prediction of strong earthquakes 1 ~ 3 days before earthquake (if there is a reasonable PS100 Network) is possible.