The authors present observations of an unexpected outburst, between 27
and 28 June 1998, of the June Bootid, a shower that in the previous
decades had almost no activity. A peak of 109 ZHR was estimated at
27.910 June.
An overview is given of Italian observations of the 1998 June Bootid
outburst.
Not Available
We present geologic or geographic structures, assumed to be craters of
meteoritic origin, discovered on radar images taken by the X-SAR on
board of the Space Shuttle, during missions carried out in April and
October 1994.
The author has attempted to determine the real frequency of meteoritical
events of megatonic class through a bibliographic search for events that
occurred during the last two centuries. The outcome of this search was
unexpected: (1) megatonic events seem to occur once every ten years; and
(2) the discovery of some presently unknown events. A list of possible
or certain megatonic events is presented.
