地震地磁观测与研究
地震地磁觀測與研究
지진지자관측여연구
SEISMOLOGICAL AND GEOMAGNETIC OBSERVATION AND RESEARCH
2014年
3期
105-111
,共7页
仇中阳%毛华峰%陈健%胡米东
仇中暘%毛華峰%陳健%鬍米東
구중양%모화봉%진건%호미동
地面记录与井下记录%频谱特性%拐角频率%地震矩%矩震级
地麵記錄與井下記錄%頻譜特性%枴角頻率%地震矩%矩震級
지면기록여정하기록%빈보특성%괴각빈솔%지진구%구진급
ground records and underground records%spectrum characteristic%corner fre-quency%the seismic moment and moment magnitude
根据苏北测震台网地面台站和深井台站记录的地震波形资料，分析2009年10月以来台网附近 ML ≥2．8地震波频谱特性。分析可知：地面记录与井下记录的地震波频谱特性存在一定差异，地面记录地震波拐角频率较井下约大0．28 Hz，地震波峰值频率比井下约小0．22 Hz；对于ML ＞4．5地震，地面记录地震波的优势频率范围小于井下记录；地震矩和矩震级地面台站记录数值较大，差值分别为3．104×1014 N·m 和0．32级。
根據囌北測震檯網地麵檯站和深井檯站記錄的地震波形資料，分析2009年10月以來檯網附近 ML ≥2．8地震波頻譜特性。分析可知：地麵記錄與井下記錄的地震波頻譜特性存在一定差異，地麵記錄地震波枴角頻率較井下約大0．28 Hz，地震波峰值頻率比井下約小0．22 Hz；對于ML ＞4．5地震，地麵記錄地震波的優勢頻率範圍小于井下記錄；地震矩和矩震級地麵檯站記錄數值較大，差值分彆為3．104×1014 N·m 和0．32級。
근거소북측진태망지면태참화심정태참기록적지진파형자료，분석2009년10월이래태망부근 ML ≥2．8지진파빈보특성。분석가지：지면기록여정하기록적지진파빈보특성존재일정차이，지면기록지진파괴각빈솔교정하약대0．28 Hz，지진파봉치빈솔비정하약소0．22 Hz；대우ML ＞4．5지진，지면기록지진파적우세빈솔범위소우정하기록；지진구화구진급지면태참기록수치교대，차치분별위3．104×1014 N·m 화0．32급。
This paper analyzes the characters of seismic wave′s spectrum which above ML 2.8 since October 2009,on records from both ground and underground instruments of stations in the north of Jiangsu province.From which we can find a deviation in the seismic wave′s spec-trums between ground and underground records.The seismic wave′s corner frequency from the ground records are higher than the underground ones about 0.28 Hz,but the peak fre-quency are less than the underground records about 0.22 Hz,and the dominant frequency are also less.In addition,The seismic moment and moment magnitude from the ground records are higher than the underground ones 3.104×10 14 N·m and 0.32.
