We present a new method to locate and invert for the source mechanisms of microseismic in hydraulic fracturing and small magnitude induced seismicity in conventional reservoirs using a robust full waveform method. This method only requires rough picks on the observed and synthetic data for initial bulk alignment. Then we utilize a new method named Fast Alignment and Matching Algorithm (FAMA) to 1) remove residual misalignment between synthetic and observed traces using an optimized cross-correlation strategy and 2) produce reference double-couple solutions as constraints for the subsequent inversion. With aligned data and source constraints produced from FAMA, a full moment tensor solution can be obtained. Our method is fast and robust, requiring only a few parameters.
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