Single Frequency Microseisms
Single Frequency Microseisms : A secondary peak near 14-second period in seismic noise related to the action of ocean waves which is usually 20-40 dB smaller than the main peak due to the double frequency microseism. Called the single frequency peak because the seismic noise is at the same frequency as the ocean waves. See Chapter 4 in this Manual, and Webb (2002)
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