Determination and Comparison of ML, MS_BB, mB, MWp, Mww, Mdt, and M (GNSS) for the 22 May 2021 M7.4 Madoi, Qianghai, China Earthquake
Determination and Comparison of ML, MS_BB, mB, MWp, Mww, Mdt, and M (GNSS) for the 22 May 2021 M7.4 Madoi, Qianghai, China Earthquake
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DOI：
10.1007/s12583-022-1680-7
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发表时间：
2022-08
影响因子：
3.3
通讯作者：
Xiaolin Huang;Yuyang Peng;Chuang Cheng;Dun Wang;Q. Yao
中科院分区：
文献类型：
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作者：
Xiaolin Huang;Yuyang Peng;Chuang Cheng;Dun Wang;Q. Yao
2021年青海玛多伊7.4级地震是近30年来在青藏高原巴彦卡拉地块发生的一次大地震，在空间上填补了该地块北部边界东段的孕震空白。在这里，我们通过大量的区域和全球地震和大地测量，确定了ML、MS_BB、MB、MWP、MWW、MDT和M(GNSS)的值，分别为6.61、7.43、7.18、7.33、7.43、7.38和7.4。为了比较不同震级尺度的时间效率和稳定性，我们生成了一个实时环境，以迭代地确定经过时间的震级。一些方法，如mB、MSBB、MWP，随着数据的增加，测定的震级随时间的变化很大，最大可达0.5个单位。其他如MWWs和Mdt则非常稳定，数据会随着时间的推移而不断增加。通过对不同震级等级的系统计算，定量评价了这些方法的稳定性和准确性，揭示了不同震级等级的适应性和适用性。
The 2021 Madoi M7.4 Earthquake in Qinghai is a major earthquake that occurred in the Bajankara Block of Qinghai-Tibet Plateau in the past 30 years, which spatially filled the seismogenic gap in the eastern section of the northern boundary of the block. Here we determined the values ofML,MS_BB,mB,MWp,MWW,Mdt, andM(GNSS) by abundant regional and global seismic and geodetic observations, which is 6.61, 7.43, 7.18, 7.33, 7.43, 7.38, and 7.4, respectively. To compare the time efficiency and stability of different magnitude scales, we generated a real-time environment, to iteratively determine the magnitudes over elapsed times. Some methods such asmB,MSBB,MWpgave considerable variations of as large as 0.5 units for the determined magnitudes with elapsed time, as more data were included. Others such asMWWandMdtwere very stable with increasing data over time. The systematic calculations of various magnitude scales in this study quantitively evaluated the stability and accuracy of those methods, shading light on the adaptability and applicability of different magnitude scales.