Abstract
By using orthogonal regression method, a systematic comparison is made between body wave magnitudes determined by Institute of Geophysics of China Earthquake Administration (IGCEA) and National Earthquake Information Center of US Geological Survey (USGS/NEIC) on the basis of observation data from China and US seismograph networks between 1983 and 2004. The result of orthogonal regression shows no systematic error between body wave magnitude m b determined by IGCEA and m b (NEIC). Provided that m b (NEIC) is taken as the benchmark, body wave magnitude determined by IGCEA is greater by 0.2–0.1 than the magnitude determined by NEIC for M=3.5–4.5 earthquakes; for M=5.0–5.5 earthquakes, there is no difference; and for M≥6.0 earthquakes, it is smaller by no more than 0.2. This is consistent with the result of comparison by IDC (International Data Center).
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Foundation item: Project "Seismic Data Share" from China Ministry of Science and Technology.
Contribution No. 05FE3024, Institute of Geophysics, China Earthquake Administration.
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Liu, Rf., Chen, Yt., Peter, B. et al. Comparison between earthquake magnitudes determined by China seismograph network and US seismograph networks (I): Body wave magnitude. Acta Seimol. Sin. 18, 627–631 (2005). https://doi.org/10.1007/s11589-005-0089-6
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DOI: https://doi.org/10.1007/s11589-005-0089-6