The increase in seismic and exploration costs during this period was primarily due to (i) a $9.8 million increase in seismic and exploration costs incurred in the U.S. Gulf of Mexico and for West Africa and (ii) a $2.9 million accrual for force majeure costs related to the drilling rig and other equipment and services which were to be used to drill the North Platte #1 exploratory well that was sus