作者在滇西红河断裂带北段布设了5个泉点,开展了砷含量变化的观测研究。通过近三年的观测,发现泉水中砷含量的变化能较好地反映该地区的中强地震活动,地震前泉水中砷含量明显增高。以澜沧7.6级地震为例,讨论了地震前后地下水中砷含量的异常特征及异常机理,并对其在地震预报中应用的可行性进行了论证。 In the northern section of the Honghe fault zone in western Yunnan, five spring points have been set up to carry out observational studies on the change of arsenic content. After nearly three years’ observation, it was found that the change of arsenic content in spring water can well reflect the strong earthquakes in this area, and the arsenic content in spring water before the earthquake is obviously increased. Taking the Lancang MS7.6 earthquake as an example, the anomalous characteristics and anomaly mechanisms of arsenic in groundwater before and after the earthquake are discussed, and the feasibility of its application in earthquake prediction is demonstrated.