【摘要】 本文从断裂力学观点出发，分析研究了大量的实际观测结果，发现强震前震中附近的台站将观测到有关地震的异常地电阻率突变序列。序列中最大突变的出现将随着震中距的加大而后移，随震级的增强而提前。而且最大突变还将由震中逐渐向外扩展。研究结果还表明，异常的明显程度还与测量方向有关。台站周围岩性的差异对异常出现的时间也有影响。对抗压性能较差的岩性，突变序列中最大突变出现的时间将会提前。据此提出了利用突变序列、突变频度、最大突变扩展速度与时距的积预报地震三要素的可能性。更多还原

【Abstract】 Based on fracture mechanics, large amount of practically observed data is analyzed in this paper, and it is disclosed that the earth resistivity station around the epicenter of a strong event has shown seismically-anomalous earth resistivity sudden change sequence. The maximum sudden change in the sequence tends to shift backward with the increase of epicentral distance, while it shifts forward with the increase of the magnitude of the earthquake. The maximum sudden change also expands from the epicenter to the peripheral areas. The result of study has also shown that the obvious degree of the anomalies is related with the measuring direction. The lithological contrast around the station also influence the time of the occurrence of the anomalies. The maximum sudden change of mutation sequence will be advanced, owing to the resistance to pressure is no good. Starting from those findings,the authors propose that it might be possible to predict the three key elements of a forthcoming earthquake by using the sudden change sequence, frequency of the sudden change, the expansion velocity of the maximum sudden change and the time-distance product.更多还原