【摘要】 分析流动重力资料在近期河南省北部4次4级以上地震发生前的异常变化过程,总结其共同特征,发现地震发生前伴有重力值明显下降的过程,出现高值异常区,地震发生在重力变化"0"线附近。更多还原

【Abstract】 Dynamic variation process of mobile gravity before four ML≥4 earthquakes in northern Henan province is analyzed.The result indicates that there is common gravity decreasing process occurred in high gravity value abnormal area before the earthquakes.The earthquakes mostly occur in the area near zero gravity changing isoline.更多还原