This is a good question. This process has seen much discussion in the news and its use in retrieving the oil reserves which have been identified to exist within our borders. Though the process has been developed earthquakes have been occurring for many years without the use of the fracking process. Determining what triggers earthquakes is not within our capability at this point in time. We do know that the plates under the ground cause earthquakes when they shift but it is unknown what causes the shift to occur. In this respect it is impossible to directly connect this process with the occurrences of earthquakes.