形变数据中天然扰动在时频域的响应研究  

RESPONSE OF NATURAL DISTURBANCE IN TIME-FREQUENCY FIELD FOR DEFORMATION DATA

作　　者：王宁[1] 吴云[2] 张燕[2] 吕健[1] 

机构地区：[1]中国地震局第一监测中心,天津300180 [2]中国地震局地震研究所,湖北武汉430071

出　　处：《内陆地震》2015年第1期65-70,共6页Inland Earthquake

基　　金：中国地震局第一监测中心科技创新主任基金(2014008)

摘　　要：对形变观测中可能影响数据质量的天然扰动现象进行了分析。不同的自然现象对形变数据在时频域上的响应不同。气压对分钟值数据的影响明显,其在时频域上的表现为优势频率低于0.05,即周期大于20 min,且在气压变化明显区域,信号能量较大;台风对秒值数据的影响较大,其优势频率集中在0.15~0.3 Hz;降水对整时值数据影响明显,其影响集中在低频部分。Through analyzing natural disturbances may affect quality of deformation data,they found time-frequency domain response with different natural phenomena. The pressure effect of minute value was obvious and its dominant frequency was lower than 0. 05,which period was greater than 20 minutes,and energy of signal was larger when pressure changes rapidly. Typhoon has greater impact on second value,and its dominant frequency ranges from 0. 15 Hz to 0. 3 Hz. Impact of rainfall has obvious effect on hour value with low frequency.

关 键 词：形变数据 天然扰动 时频响应 

分 类 号：P315.7[天文地球—地震学]