 The Olami, Vader and Christensen OFC spring block model has been used to successfully reproduce UTSA's law for earthquakes. Using this model, we have identified a possible aftershock area around the main shock and compared it to real earthquakes. We then used the available data to propose a new equation to calculate the size of the aftershock area. Next, we simulated a main shock event and plotted its epicenter along with the epicenters of the possible aftershocks within the calculated area. Our results show that the epicenters of the main shock and the possible aftershocks are similar to the original work of UTSU. Therefore, it can be concluded that UTSA's law is reproducible using the OFC spring block model with the SOC model. This article was authored by Alfredo Salinas Martinez, Jennifer Perez-Oregon, Ana Maria Aguilar Molina, and others.