Microseismic Signal Classification Based on Artificial Neural Networks

Figure 3

Waveform and upper envelope of microseismic signal. (a) The blue line is the waveform; the red line is the upper envelope calculated from each signal segment with 20 raw microseismic data points. (b) Upper envelope of microseismic signal. Pink dots and the green line represent the maximum and average values of the upper envelope, respectively. The gray band represents an envelope peak.

(a)

(b)