【摘要】 本文介绍了辽西小塔子M_s4.7(M_L5.1)地震和彰武M_s4.8(M_L5.2)地震之前的测震学特征,其中包括频度变化、应变能变化、b值变化、活动标度变化、空区和前兆性震群等方面特征。虽然小塔子地震前的测震学征兆比彰武地震前要明显,但是,它们之前都有不同程度的前兆性显示。这个结果表明,不仅强震之前有预兆,而且象辽西小塔子和彰武这样的中等地震之前也有预兆,从而为区域地震的预报工作增添了有力例证和信心。更多还原

【Abstract】 This paper describes the seismometry characteristics before Xiaotazi earthquake with MS 4.7 and Zhangwu earthquake with MS4.8 in the west of Liaoning Province. The seismometry characteristics include variations of frequency, strain energy, b-value, activity scale, seismic gap and precursory earthquake swarm. There were precursory displays at different degrees before both events, although the seismometry omen before the Xiaotazi earthquake was more obvious than that before the Zhangwu earthquake. The result shows that there exists an omen not only prior to strong earthquake but also moderate ones such as Xiaotazi and Zhangwu earthquakes in the west of Liaoning Province, Thus this added a powerful example and confidence for regional earthquake prediction.更多还原