Error distribution when using first-break arrival times to locate microseismic events

Baolin Qiao and John C. Bancroft

ABSTRACT

SVD method was used to estimate 3D hypocenter location and origin time of a microseismic event. Given variance of observed first-break arrival time, 3D error distribution of hypocenter location is calculated. It is shown that uncertainty in vertical direction is much bigger than that in horizontal directions.

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