[1]ZHOU Qingyun,CHEN Junlei.Influence of different triggering conditions of airgun source on travel time changes[J].Journal of Seismological Research,2018,41(02):264-272.
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Influence of different triggering conditions of airgun source on travel time changes
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
41
Number of periods:
2018 02
Page number:
264-272
Column:
Public date:
2018-04-20
- Title:
- Influence of different triggering conditions of airgun source on travel time changes
- Keywords:
- airgun source; travel time changes; triggering condition
- CLC:
- P315.3
- DOI:
- -
- Abstract:
- Airgun source is a new type of artificial source,and it performs very well in travel-time changes research because of its high repeatability. To get the effect of exciting condition,we carried out the time changes analysis with excitement in different pressure,depth and location. The results showed that:(1)Shapes and cross correlation coefficients between waveforms in different exciting conditions show clear diversities.(2)Travel time changes reach 0.06s if air-gun’s pressure increased from 9 MPa to 15 MPa.(3)High-frequency component of the received data has changed and low-frequency component has not,so the reason of the time changes which associated with triggering condition change is the coupling of the two components. These changes do not real travel-time-changes.(4)Because the tendency of different time window of received data is not similar,it is difficult to remove influence of triggering condition. We suggest keeping triggering condition unchanged in later experiment if possible. If the already produced data are used,it’s better to select data which have the same amplitude.
- References:
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Last Update:
2018-04-23