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Microseismic monitoring is a method for localizing fractures induced by hydraulic fracturing in search for shalegas. The aim of this paper is to conduct the data interpretation of the microseismic monitoring based on the results from Pomeraniaregion of Poland. The data has been collected from an array of geophones deployed on the surface. Ground vibrationshave been recorded and analyzed for fracture location, magnitude and breakage mechanism. A velocity model of underlyingformations has been used for successful microseismic monitoring. The model has been further tuned with signal from perforationshots of known location. Imaging of events has been done using software MicSeis, which utilizes diffraction stacking ofwaveforms from multiple stations to image microseismic events with low signal-to-noise ratio. The imaging of microseismicevents in MicSeis uses a grid search over all possible origin times and locations in the selected rock volume. The seismicmoment tensors are automatically determined from the amplitudes from the grid search procedure and are used to model polaritiesof events which then enhance constructive interference. Function characterizing a maximum stack per time sample havebeen calculated over whole volume and analyzed using the STA/LTA algorithm. Once the event has been detected in time,location has been determined through analysis of the 3D spatial image function. The procedure has been used to detect fiveevents during hydraulic fracturing in Pomerania.

DOI: https://doi.org/10.3846/enviro.2017.001