A Synthetic Solution for Identification and Extraction of the Effective Microseismic Wave Component Using Decomposition on Time, Frequency, and Wavelet Coefficient Domains

Table 1

Necessary wavelet packet coefficient thresholds restricted by the frequency threshold in a specific time window.

Threshold	Wavelet packet coefficient (×10^−3)
	(I)	(II)	(III)	(iv)	(v)	(vi)	(vii)
Frequency (Hz)
0~31.25	/	3.72	3.72	/	/	2.185	2.185
31.25~250	/	1.356	1.356	/	/	1.219	1.219
0~81.1	3.72	/	/	2.185	2.185	/	/
81.1~250	1.356	/	/	1.219	1.219	/	/