Research Article
Accurate Method for Picking Up the First Arrival Time of Microseismic Signals Based on Entropy Theory
Table 1
First signal arrival pickup results.
| Method | Allen method | Fractal method | Entropy method |
| First arrival time | 1012.2 ms | 1011.4 ms | 1011.3 ms | Picking error | 1.2 ms | 0.4 ms | 0.3 ms |
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