A new way to generate seismic waves for continental crustal exploration  

作　　者：CHEN Yong ZHANG XianKang QIU XueLin GE HongKui LIU BaoJin WANG BaoShan 

机构地区：[1]Institute of Geophysics, China Earthquake Administration, Beijing 100081, China [2]Geophysical Exploration Center, China Earthquake Administration, Zhengzhou 450002, China [3]CAS Key Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China

出　　处：《Chinese Science Bulletin》2007年第16期2264-2268,共5页

基　　金：Supported by the National Natural Science Foundation of China (Grant Nos.40234038 and 40574019);Ministry of Science and Technology of China (Grant No. 2005DIA3J117);the Chinese Academy of Sciences (Grant No. KZCX3-SW-234)

摘　　要：An airgun experiment was conducted in a reservoir,with the total volume of the airgun array being 6000 cubic inch. The energy released by one excitation was estimated to be 6.68×106 J,which corresponded to a 3.4 kg TNT explosion. A 180 km long profile composed of 100 portable short period seismometers was deployed as a receiver system of the airgun signals. Two remarkable results can be drawn from the experiment: (1) the airgun explosion is harmless to the dam and the fish,and this kind of airguns can be regarded as a green and environmental protection seismic source on land; (2) seismic wave gener-ated by this airgun source can be recorded by permanent stations with offset larger than 200 km. And the wave amplitudes recorded by nearby and remote stations are equivalent to the wave generated by 800 kg dynamite explosion. The airguns can be used as a light to illuminate the continental crustal structure of an area of about 100000 km2.An airgun experiment was conducted in a reservoir, with the total volume of the airgun array being 6000 cubic inch. The energy released by one excitation was estimated to be 6.68x10s J, which corresponded to a 3.4 kg TNT explosion. A 180 km long profile composed of 100 portable short period seismometers was deployed as a receiver system of the airgun signals. Two remarkable results can be drawn from the experiment： （1） the airgun explosion is harmless to the dam and the fish, and this kind of airguns can be regarded as a green and environmental protection seismic source on land; （2） seismic wave generated by this airgun source can be recorded by permanent stations with offset larger than 200 km. And the wave amplitudes recorded by nearby and remote stations are equivalent to the wave generated by 800 kg dynamite explosion. The airguns can be used as a light to illuminate the continental crustal structure of an area of about 100000 km^2.

关 键 词：地震波 地壳探测 环境保护 震源 

分 类 号：P315[天文地球—地震学]