周日晚间日本附近海底曾发生地震，美国地质调查局测定的震级为7.1级。
An earthquake measured at 7.1 by the U.S. agency struck Sunday night, centered off the coast of Japan.
这场地震非常强烈，据测定震级为里氏7.9级。这个级别的地震的确会为建筑带来不可避免的损害。
The earthquake was so powerful, measuring at least 7.9 in magnitude, that a certain amount of damage could not be prevented.
但周三余震后并没有发生海啸。据美国地质调查局(u.s.Geological Survey)初步测定，余震震级从5.9到6.3级不等。
But no tsunami followed Wednesday's aftershocks, the magnitudes of which ran from 5.9 to 6.3 in preliminary readings by the U.S. Geological Survey.
据测定这次地震的震级为9级。
据美国地质勘探局测定，地震震级为7.8级，印度首都新德里的高楼有晃动。
The quake, which the US Geological Survey rates as a magnitude 7.8, was strong enough to shake buildings as far away as New Delhi, India.
并讨论了微震仪脉冲响应的近似计算，以及震级标度对测定结果的影响。
Finally, a discussion is held on the approximate calculation of the microseismograph's pulse response and the influence of magnitude determination upon the determination result.
对大庆台网深井摆和DK-1仪器测定的震级偏差进行了研究。
We study the magnitude deviation of borehole seismograph and DK 1 seismolograph in Daqing network.
经过验算，单台测定震级与山西省地震局台网测定震级的偏差缩小，对提高这2个台震级的精度有一定效果。
Through the check, the deviation between the magnitude by the single station and by the network of Shanxi province decreased, thus improving the accuracy of magnitude determinated by the 2 stations.
使用陕西数字地震台网1998～2003年间的地震记录，以台网平均震级为标准震级，分析了各子台的测定震级。
On the Basis of 1998-2003 digital seismic data from the Shaanxi Digital Seismic Network, we analyzed the magnitudes determined by the substations of the network.
通过检验认为，就本地区目前的观测条件和M_L测定方法而言，该震级系统已将M_L测定误差明显减小了。
The statistical results indicate th average error of magnitude M_L has been obviously decreased by this system.
叙述了在大同—阳高地震现场工作中用限幅时间测定震级的方法。
Related in this paper is the method of monitoring the magnitude by way of clip time in the field work for the Datong -Yanggao earthquake.
美国地质勘探局测定，这次地震的震级为里氏6.2级，震中位于诺尔恰镇东南大约10公里处。
The U. S. Geological Survey put the magnitude at 6.2 with an epicenter about 10 kilometers southeast of the town of Norcia.
利用德令哈地震台dd - 1记录到的746个近震，对其测定的震级偏差进行统计计算，发现DD - 1测定的震级偏小。
The magnitude deviation is statistically calculated by 746 local earthquakes recorded by DD-1 at Delingha station, and it is found that the magnitudes by DD-1 are smaller.
利用德令哈地震台dd - 1记录到的746个近震，对其测定的震级偏差进行统计计算，发现DD - 1测定的震级偏小。
The magnitude deviation is statistically calculated by 746 local earthquakes recorded by DD-1 at Delingha station, and it is found that the magnitudes by DD-1 are smaller.
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