First-Arrival Picking for Microseismic Monitoring Based on Deep Learning

Figure 19

First-arrival picking result of the signal shown in Figure 18(a). (a) Local amplification of the signal in the range from 3650 ms to 3800 ms. (b) The picking result in the signal band from 3650 ms to 3800 ms obtained by the UNet++. (c) The picking result in the signal band from 3650 ms to 3800 ms obtained by the U-Net. (d) The picking result in the signal band from 3650 ms to 3800 ms obtained by the STA/LTA for the long- and short-time windows of 300 and 100, respectively.