Louisiana Geological Survey. Louisiana earthquakes questionnaires and letters, 1983, 1991. 0.3 linear ft. Location: 107:18. Completed questionnaires that were submitted by Louisiana residents in response to a survey studying earthquakes that hit the state. Some questionnaires are in response to the October 16, 1983 tremor that was recorded in the area south of Lake Charles, Louisiana. Others are requests for information from residents who felt a tremor in southeast Louisiana on December 3, 1991. The 1983 study was conducted by Donald Stevenson of the Baton Rouge office of the Louisiana Geological Survey. The questionnaires were printed in newspapers and respondents provided information by indicating "yes" or "no" responses or by circling a level of activity as provided on the form. Many respondents included their addresses and attached letters to their forms. Also included are geological maps of Louisiana indicating sites of quakes and a seismogram. Mss. 4940.