The British Seismology and Survey Department was a British organisation that in August 1950 detected unusual seismic activity under the English Channel. They petitioned to the British Army to quiet the shore batteries holding the Chimeran forces at bay, but continual attacks by Chimeran Dropships made a ceasefire impossible. It was later realised that the seismic activity was the result of Chimeran Burrowers, digging tunnels under the Channel.