The study of processes and earth physical properties using seismic data is one of the trending topics in geological studies. The characteristic of earth in very deep layers using seismology is studied by natural earthquakes and checking the crust in low depth using seismology with artificial seismic sources. Passive Seismic is a method in which the natural seismic sources are in service for geophysical studies, particularly in the Hydrocarbon reservoirs explorations. This method can be used to gather information from the site and seismic studies in picturing the geological layers of earth using the seismic data. Furthermore, this method is carried out in the areas where the seismic data with artificial source is not obtainable or the results are not satisfying. The basis of this approach is the evaluation of in-site noises and micro seismic. The privilege of this approach in discovering the hydrocarbon reservoirs is the low budget.