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Foundation item: “Ninth Five-Year Plan” key problem tackling program of China Seismological Bureau under contract No. 96-913-09-01-01-03.
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Ping, Jj., Zhang, Qr., Cao, Sc. et al. The quiescence of earthquakes with M L≥4.0 as an important precursory characteristic prior to strong shocks in North China region. Acta Seimol. Sin. 14, 471–480 (2001). https://doi.org/10.1007/s11589-001-0126-z
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DOI: https://doi.org/10.1007/s11589-001-0126-z