The Guardian | Oil drilling caused killer earthquake in boomtime California, scientists suspect The Guardian Several damaging Los Angeles-area earthquakes of the 1920s and 1930s, including the deadliest ever in southern California, may have been brought on by oil production during the region's drilling boom of that era, US government scientists have reported. Oil Production Could Have Caused Century-Old California Earthquakes Oil drilling may have caused deadly 1933 California quake, study by US Geological Survey suggests Some Los Angeles earthquakes possibly triggered by oil production in early 20th century |