【摘要】 利用乌鲁木齐台地磁垂直分量1980~2004年的25年时均值资料计算日变幅及其逐日比,比较了日变幅与日变幅逐日比法对应地震的效果,发现日变幅逐日比异常后对应地震的效果比日变幅异常对应地震的效果更佳,在二者的共同的预报时段内,地震对应率更高。Z分量日变幅逐日比值超过5倍均方差线后与周围270 km范围内的MS5地震对应较好,且通过了具有97.5%置信水平的R值评分检验,表明具有较好的预报效能。更多还原

【Abstract】 Using the hour mean value data of geomagnetism vertical component about 25 years from 1980 to 2004 in Urumqi station to compute day change amplitude and the day to day ratio,we contrasted the effect of corresponding earthquakes between the day change amplitude and the day to day ratio method.We find that the corresponding result of the day to day ratio anomaly is better than one of the day change amplitude anomaly.In the common forecast time of them,the corresponding ratio of earthquakes is higher.After the ratio value of Z component about day to day ratio of day amplitude surpasses 5 time of mean-square deviation,it is better that the corresponding earthquakes with MS5 in the range of 270 km around them.And it passed R value test with 97.5% level.It showed that it had the good potency to forecast earthquakes.更多还原