【摘要】 本文根据溧阳六级地震后对近二百台磁偏角资料调查结果,提出对磁偏角资料质量的评定办法和选择标准,指出绝大多数(约98％以上)测点都受到环境条件、设备条件等严重干扰。通过溧阳六级震前磁偏角异常的分析,认为可分辨的异常仅限于离震中100公里范围内,异常期不到两个月。本文认为,必须对磁偏角观测工作进行全面的整顿和改造,若能真正使资料质量得到保证,磁偏角还是可望在地震的短期预报中发挥作用的。更多还原

【Abstract】 According to the results from the review of the magnetic declinations at nearly two hundred sites after the Liyang Earthquake (M = 6.0) ,this paper suggests the determinative method and the selective standard for the quality of the magnetic declination data ,and points out that the majority of the sites (approximately over 98%) are strongly interfered by the environmental and the instrumental conditions.By analysing the anomalous magnetic declinations before the Liyang Earthquake,it is considerred that the discernible anomalies are only shown within 100 km from the epicentre,and the anomalous period is less than two months.The paper suggests that there should be an over-all rearrangement and improvement for the observation of the magnetic declination.If the data quality can be really guaranteed the magnetic declination will be expected to play a certain role in short-term prediction.更多还原