This course introduces the basics of using microseismic surveys to study hydrocarbon reservoirs. A microseismic survey is a 3D technology used to monitor subsurface processes by analyzing microearthquakes. Microearthquakes occur when production, injection or hydraulic fracturing cause changes in the pore pressure of a hydrocarbon reservoir that trigger slippage on bedding planes or fractures. The course begins with basic topics required to understand microseismic events and then discusses applications of microseismic surveys. Among the applications are monitoring fracture stimulation operations and relating production to microseismic data. The course includes examples, exercises and offers a list of digital papers for those interested in more information about a particular topic.