In a message dated 98-02-25 15:21:42 EST, you write: << I was thinking of Tunguska and one in Brazil. >> I was referring to the 1908 Tunguska and the one on Aug 13, 1930 near the Brazil-Peru Border and another on Dec 11, 1935 over British Guyana. My reference was in the December 1995 WGN on page 207 by Duncan Steele. George Zay