山西地震
山西地震
산서지진
EARHTQUAKE RESEARCH IN SHANXI
2012年
4期
12-15
,共4页
靳玉科%梁向军%贾海玉%侯玉文%马金平%张青玄
靳玉科%樑嚮軍%賈海玉%侯玉文%馬金平%張青玄
근옥과%량향군%가해옥%후옥문%마금평%장청현
Sato模型%山西北部%尾波Q值
Sato模型%山西北部%尾波Q值
Sato모형%산서북부%미파Q치
Sato model%North of Shanxi%Q value of coda wave
依据sato单次散射模型,对山西北部(北纬380-41^0)2001年至2011年13个数字遥测子台记录的地震波形资料进行计算和分析。拟合尾波窗长40S时尾波Q值对频率的依赖关系,得到山西北部地区Q值随频率的变化关系式。其中,阳原台Q。值最高,大同台Q0值最低。研究区多数台站都表现为低Q0值,高q值,符合Q值与频率的依赖关系,表明该地区地下介质非均匀程度高,构造活动强烈;另外,研究区大同台、右玉台和偏关台相对于本次研究的其他台站为低Q0值区,这一区域正好位于我省西北部NNE走向的口泉活动断裂处,中间以盆地为分割,与恒山、六棱山断裂分开,表明研究结果与研究区活动断裂和沉积厚度有一定的关系。
依據sato單次散射模型,對山西北部(北緯380-41^0)2001年至2011年13箇數字遙測子檯記錄的地震波形資料進行計算和分析。擬閤尾波窗長40S時尾波Q值對頻率的依賴關繫,得到山西北部地區Q值隨頻率的變化關繫式。其中,暘原檯Q。值最高,大同檯Q0值最低。研究區多數檯站都錶現為低Q0值,高q值,符閤Q值與頻率的依賴關繫,錶明該地區地下介質非均勻程度高,構造活動彊烈;另外,研究區大同檯、右玉檯和偏關檯相對于本次研究的其他檯站為低Q0值區,這一區域正好位于我省西北部NNE走嚮的口泉活動斷裂處,中間以盆地為分割,與恆山、六稜山斷裂分開,錶明研究結果與研究區活動斷裂和沉積厚度有一定的關繫。
의거sato단차산사모형,대산서북부(북위380-41^0)2001년지2011년13개수자요측자태기록적지진파형자료진행계산화분석。의합미파창장40S시미파Q치대빈솔적의뢰관계,득도산서북부지구Q치수빈솔적변화관계식。기중,양원태Q。치최고,대동태Q0치최저。연구구다수태참도표현위저Q0치,고q치,부합Q치여빈솔적의뢰관계,표명해지구지하개질비균균정도고,구조활동강렬;령외,연구구대동태、우옥태화편관태상대우본차연구적기타태참위저Q0치구,저일구역정호위우아성서북부NNE주향적구천활동단렬처,중간이분지위분할,여항산、륙릉산단렬분개,표명연구결과여연구구활동단렬화침적후도유일정적관계。
Using Sato single scatter model, seismic waveform data recorded by 13 digital stations in north of Shanxi from 2001 to 2011 are calculated and analyzed. Correlation of Q value of coda wave to frequency is fitted for the coda wave window of 40s and variation of Q value with frequency in north of Shanxi is figured out. The highest Q0value, which is up to 31.82 ,is at Yangyuan Station , whereas the lowest, 31.82, is at Datong Station. That most stations in studied region show low Q0 value and high -q value , which coincide with correlation of Q value and frequency, illustrates that non-uniform degree of underground medium is high and that tectonic activity is intensive in the region. In addition, compared with other stations with low Q0 value, Datong, Youyu and Pianguan stations that show low Qo value just locate at Kouquan fault of NNE direction in northwest of Shanxi province, being detached with Hengshan and Liulengshan fault by the basin. The result indicates that activity faults have some relation with sediment thick of the studied region.