A method of determining location of end portions of a fracture in a subsurface formation penetrated by a well , comprising the steps of: (a) emitting electromagnetic energy from a ground penetrating radar transmitter in the well at a depth of interest; (b) receiving ground penetrating radar electromagnetic energy with a radar receiver, Rx, in the well at a distance from the ground penetrating radar transmitter, Tx, characterized in that the step of receiving ground penetrating radar electromagnetic energy with a radar receiver, Rx, comprises the steps of: 1) sensing arrival of a first break pulse indicating the spacing of the radar transmitter, Tx, and radar receiver, Rx; and 2) sensing arrival of a second break pulse indicating presence of a fracture as a secondary electromagnetic energy source; and in that the method further comprises the steps of: (c) sensing time of receipt of the ground penetrating radar electromagnetic energy by the radar receiver, Rx; (d) determining from the arrival time of the received electromagnetic energy the location of end portions of the fracture in the subsurface formation, wherein the step of determining the location of end portions of the fracture comprises the step of determining the location of end portions of the fracture from the arrival time of the second break pulse . (a) emitting electromagnetic energy from a ground penetrating radar transmitter in the well at a depth of interest; (b) receiving ground penetrating radar electromagnetic energy with a radar receiver, Rx, in the well at a distance from the ground penetrating radar transmitter, Tx, characterized in that the step of receiving ground penetrating radar electromagnetic energy with a radar receiver, Rx, comprises the steps of: 1) sensing arrival of a first break pulse indicating the spacing of the radar transmitter, Tx, and radar receiver, Rx; and 2) sensing arrival of a second break pulse indicating presence of a fracture as a secondary electromagnetic energy source; and in that the method further comprises the steps of: the well at a distance from the ground penetrating radar transmitter, Tx, characterized in that the step of receiving ground penetrating radar electromagnetic energy with a radar receiver, Rx, comprises the steps of: 1) sensing arrival of a first break pulse indicating the spacing of the radar transmitter, Tx, and radar receiver, Rx; and 2) sensing arrival of a second break pulse indicating presence of a fracture as a secondary electromagnetic energy source; and in that the method further comprises the steps of: 1) sensing arrival of a first break pulse indicating the spacing of the radar transmitter, Tx, and radar receiver, Rx; and 2) sensing arrival of a second break pulse indicating presence of a fracture as a secondary electromagnetic energy source; and in that the method further comprises the steps of: (c) sensing time of receipt of the ground penetrating radar electromagnetic energy by the radar receiver, Rx; (d) determining from the arrival time of the received electromagnetic energy the location of end portions of the fracture in the subsurface formation, wherein the step of determining the location of end portions of the fracture comprises the step of determining the location of end portions of the fracture from the arrival time of the second break pulse . <EOS>