Geological Survey Department Warns Against Taking Last Night's Earth Tremor Lightly The National Director of the Ghana Geological Survey Department, John Adjei Dodoo, has warned that last night's earth tremor could be a sign of a greater thing to come. He said a tremor is a smaller version of earth quake and last night's incident cannot be treated in isolation. Speaking to Radio Ghana, Mr Dodoo advised the public not to panic when there is tremor. GBC