文章摘要
郭晓,邹锐,张璇,王莹.中国大陆几次强地震长波辐射异常分析[J].地震工程学报,2019,41(5):1221-1227,1250. GUO Xiao,ZOU Rui,ZHANG Xuan,WANG Ying.Anomalies in Outgoing Long-Wave Radiation for Several Strong Earthquakes in Mainland China[J].China Earthquake Engineering Journal,2019,41(5):1221-1227,1250.
中国大陆几次强地震长波辐射异常分析
Anomalies in Outgoing Long-Wave Radiation for Several Strong Earthquakes in Mainland China
投稿时间:2018-06-12  
DOI:10.3969/j.issn.1000-0844.2019.05.1221
中文关键词: 强地震;长波辐射;小波变换;功率谱;地震异常;卫星遥感
英文关键词: strong earthquake;outgoing long-wave radiation (OLR);wavelet transform;power spectrum;earthquake anomalies;satellite remote sensing
基金项目:中国地震局星火计划(XH17039)
作者单位
郭晓 甘肃兰州地地球物理国家野外科学观测研究站, 甘肃 兰州 730000
中国地震局兰州地震研究所, 甘肃 兰州 730000 
邹锐 甘肃兰州地地球物理国家野外科学观测研究站, 甘肃 兰州 730000
中国地震局兰州地震研究所, 甘肃 兰州 730000 
张璇 中国地震局兰州地震研究所, 甘肃 兰州 730000 
王莹 中国地震局兰州地震研究所, 甘肃 兰州 730000 
摘要点击次数: 88
全文下载次数: 43
中文摘要:
      大地震前存在长波辐射异常已被许多震例所证实,为进一步分析强地震前的长波辐射异常变化特征,提取其异常的判定指标。以多年静止卫星长波辐射资料(OLR)为基础,应用小波变换和功率谱估计方法对中国大陆6级以上地震进行分析研究。结果表明,6次强地震前三个月内均出现不同程度的长波辐射异常现象,与以前震例分析结果较为一致。空间上在震中及其附近区域异常整体呈现开始-增强-极值-减弱-消失过程,异常最大值时大于多年均值的1倍标准偏差的范围面积达数万到十几万km2,异常最大值时相对功率谱幅值均在10倍以上;时间上震中附近小区域相对功率谱幅值持续偏离多年均值的1倍标准偏差,持续偏离时间介于40~75天。这些强地震的异常判定指标具有短期预测指示意义。
英文摘要:
      The existence of outgoing long-wave radiation anomalies before great earthquakes has been confirmed many times. To further analyze abnormal changes in long-wave radiation before strong earthquakes, determination indeces of long-wave radiation anomalies were extracted. Based on outgoing long-wave radiation (OLR) data from geostationary satellite data, the wavelet transform and power spectrum estimation were applied to analyze the OLR anomalies from several strong earthquakes in Mainland China. Results indicated that the anomalous amplitude of OLR increased to different degrees within three months of six strong earthquakes. Results were consistent with those of previous earthquake cases. Anomalies in the epicenter and surrounding area presented the normal process of "start, enhance, maximum, weaken, and disappear." When the anomaly reached its maximum value, areas with anomalies >1×standard deviation of the annual average value reached tens of thousands to hundreds of thousands km2. Amplitudes of relative power spectra were >10×standard deviation. In addition, amplitudes of relative power spectra in the epicenter and vicinity were >1×standard deviation from the annual average value in a period of 40~75 days. The anomalies characteristic of these strong earthquakes were indicative of short-term predictions.
查看全文   查看/发表评论  下载PDF阅读器
关闭

您是第2377125位访问者
版权所有欢迎《地震工程学报》编辑部
主管单位:中国地震局 主办单位:中国地震局兰州地震研究所
清华大学
中国地震学会
中国土木工程学会
地  址: 甘肃省兰州市东岗西路450号 邮编:730000 电话:0931-8275892 E-mail: dzgcxb@gsdzj.gov.cn
本系统由北京勤云科技发展有限公司设计