We suggest a simple inversion algorithm to find the location of microseismic event. We used a linear velocity gradient model to simplify the algorithm. It can estimate the vertical velocity gradient of model and the location of microseismic events using the Maximum Intersection (MAXI) method. It can remove the effect of origin time and increase the number of data. We also modified the forward problem equations to solve the numerical instability of previous forward problem by using the definition of ray parameter. We verified our algorithm using the synthetic data set which is generated by mimicking the well logging data. We could obtain the velocity information and meaningful location of microseismic event.


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  1. Choi, W., Kim, W., & Pyun, S.
    A simple inversion algorithm to estimate a linearly increasing velocity model for microseismic monitoring. Exploration Geophysics. doi: 10.1071/EG17104
    https://doi.org/10.1071/EG17104 [Google Scholar]
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    (2004). Hypocentre determination offshore of eastern Taiwan using the maximum intersection method. Geophysical Journal International, 158(2), 655–675.
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