摘要
在对中国数字地震台网（ＣＤＳＮ）兰州台近年来记录到的兰州附近的５个工业爆破和发生在同一地区震级相近的７个天然地震作波谱分析和比较后，发现人工爆破和天然地震的波谱参数与震源参数有较大的差异，在震级与震源深度相近的条件下，主要差异有：①爆破的Ωｍ（ω）值明显大于地震的Ωｍ（ω）值，Ωｍ（ω）爆≈１５Ωｍ（ω）震；②爆破的Ω（０）值明显大于地震的Ω（０）值，Ω（０）爆≈１９Ω（０）震；③爆破的震源线度明显小于地震的震源线度，ｒ爆≈０７ｒ震。这些差异和它们之间的关系可初步作为识别人工爆破和天然地震的测震学指标。
Using the data recorded by China Digital Seismological Network (CDSN) Lanzhou Station,we have analyzed the wave spectrum of 5 explosions and 7 earthquakes occurred at the same area with nearly the same magnitude as the 5 explosions.After comparing the wave spectrum of earthquakes and explosions,we find there exist great differences in wave spectrum parameters and source parameters.The major differences between the two types of events are as follows:(1)the Ω m(ω) of explosion is greater than that of earthquake, Ω m(ω) explosion ≈1 5 Ω m(ω) earthquake (2)the Ω (0) of explosionisgreaterthanthat of earthqua ke, Ω (0) explosion ≈1 9 Ω (0) earthquake .(3) the source dimension of explosion is less than that of earthquake, r explosion ≈0 7 r earthquake .These differences and relationship may be used as seismic indexes to discriminate explosions from earthquakes.
出处
《地震地磁观测与研究》
1999年第3期18-23,共6页
Seismological and Geomagnetic Observation and Research
关键词
爆破
波谱差异
中国
兰州市
地震
explosion,wave spectrum difference,Lanzhou of China
