The neurofeedback training-induced alpha activity have been observed over widespread brain regions on topographicelectroencephalogram analysis. However, the generation mechanism of the alpha activity has not been clarified yet. Thepresent study was aimed to identify sources of the alpha activity through four different temporal/spectral analytic tech-niques, i.e., max peak average, positive average, negative average and event-related spectral perturbation average methods.Twenty participants were trained through 12 sessions by receiving feedback of alpha amplitude and showed significantalpha amplitude increment. The alpha activities were averaged through four different methods for dipole source analysis.Similar results from four methods showed that the sources of the alpha activity clustered in precuneus, posterior cingulatecortex and middle temporal gyrus. Our findings indicated that alpha activity is trainable through our NFT protocol. Thethree brain regions play important roles for enhancing the training-induced alpha activity.