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http://dx.doi.org/10.5467/JKESS.2021.42.2.195

Determining the Orientation of Accelerograph Stations in South Korea using Ambient Noise Data  

Lee, Sang-Jun (The Institute of Basic Science, Korea University)
Publication Information
Journal of the Korean earth science society / v.42, no.2, 2021 , pp. 195-200 More about this Journal
Abstract
Orientation corrections for the total of 268 accelerograph stations of the Korea Meteorological Administration (KMA) were estimated using ambient noise cross-correlation. As this method uses ambient noise data instead of teleseismic waveforms from earthquakes under certain conditions, reliable orientation corrections can be obtained using only two-month long continuous seismic data from dense seismic networks in the Korean peninsula.Three-component continuous data recorded at the 268 accelerograph stations from January to February 2020 were used to estimate orientation corrections. The results are comparable to the previous results obtained from teleseismic waveforms; the overall standard deviations of the orientation corrections are less than 5°. Therefore, orientation corrections for the accelerograph station network can be tracked periodically by the ambient-noise method and the result can be used in various studies using the horizontal-component of acceleration data.
Keywords
orientation correction; ambient noise cross-correlation; accelerograph stations; bore-hole stations;
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