1. A method for mapping and monitoring of hydraulic fracture, the method comprising: capturing, using an array of sensors, a first magnetic image of a well pay zone; capturing, using the array of sensors, a second magnetic image after a well bore is padded with a fluid; establishing a background based on the first and the second magnetic images; capturing, using the array of sensors, a third magnetic image after a doped proppant is injected into a stage; and processing the third image to subtract the background and to obtain information regarding distribution of the fluid and the proppant in the stage.