【摘要】 利用乌鲁木齐地震台1985、1986年SK中长周期地震仪记录到的279次和763长周期地震仪记录的385次世界各地地震事件（Ms≥4．0，6≥6．0°，h≥80km），计算得出乌鲁木齐台763仪面波震级的平均偏差八M=0．033，标准误差S=±0．211；SK仪面波震级的平均偏差凸M=0．021，标准误差S=±0.238。分析得出震级偏差与震中距离有关，计算了新的起算函数，求出厂部分区域震级偏差值。更多还原

【Abstract】 The Urumqi Seismostation had observed many earthquakes occurred in different regionsof the world during 1985 and 1986. In them there are 279 earthquakes recorded by SK medium-long period seismographs and 385 by 763 long period Seismographs. To use these data,Average deviation (aM)and standard error (S) of surface wave magnitude were calculated.For 763 seismograph, 6M~0. 033, S=±0. 211 for SK seismograph, M= 0. 021, S=±0. 238. It is considered that magnitude deviation is concerned with epicentral distance basedon above analyses. In addition, a new zero function was computed and the magnitude tieviations in some regions were obtained.Descriptors: Seismic wave; Surface wave: Earthquake parameter ;Magnitude; Epicentral distance; Seismostation Urumqi更多还原