First-Arrival Picking for Microseismic Monitoring Based on Deep Learning

Figure 22

First-arrival picking result of the signal shown in Figure 21(a). (a) Local amplification of the signal in the range from 430 ms to 530 ms; (b) The picking result in the signal band from 430 ms to 530 ms obtained by the UNet++. (c) The picking result in the signal band from 430 ms to 530 ms obtained by the U-Net. (d) The picking result obtained by STA/LTA in the signal band from 430 ms to 530 ms, where the long- and short-time windows were 300 and 100, respectively.