【摘要】 中国台湾地区地处欧亚板块与菲律宾海板块之间,地震活动频繁．本文报道了 我国台湾地区及其邻近海域1985～2002年间5．5级以上地震的条带内外频度比分 布,并着重研究了1999—2002年中发生的3次7．5级以上地震前的条带现象．其结 果表明:台湾地区近期发生的3次7．5级以上大地震前,5．5级以上地震呈条带分 布．这些条带符合条带内地震个数Nin≥6的条件,符合条带内、外频度比Nin／(Nin+ Nout)≥75％的条件,也符合条带长宽比大于5的要求,只是与板内地震条带相比,条 带的长度较短．更多还原

【Abstract】 Taiwan is located between Eurasia plate and Philippine Sea plate and its seismic activity is frequent. This paper has reported the frequentness ratio distribution around the strip of more than 5.5 earthquakes in Taiwan and its adjacent sea area in our country from 1985 to 2002,and studied the strip phenomenon before three more than 7.5 earthquakes that was happened in 1999 and 2002 emphatically. The result show that more than 5.5 earthquakes present strip distribution before three more than 7.5 strong earthquakes occurred in Taiwan area recently . These strip accord with the conditions of earthquake numbers Nin≥6 within the strip and frequentness ratio of in and out strip Nin/ (Nin+Nout)≥75% , and also accord with the condition of the ratio of length and width > 5, but the length of the strip is relatively short compared with the earthquake strip within the plate.更多还原