Dust Storm |
Dust Storm |
Oct 18 2005, 05:47 PM
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Junior Member Group: Members Posts: 71 Joined: 11-May 05 From: Colorado USA Member No.: 386 |
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Oct 24 2005, 09:31 PM
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Member Group: Members Posts: 356 Joined: 12-March 05 Member No.: 190 |
How frequently do global dust storms occur on Mars? I know there was one in 2001 and one in 1971 but that's all I'm aware of. Surely there must have been many more recorded in the last century.
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Oct 29 2005, 02:49 PM
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Dublin Correspondent Group: Admin Posts: 1799 Joined: 28-March 05 From: Celbridge, Ireland Member No.: 220 |
QUOTE (deglr6328 @ Oct 24 2005, 10:31 PM) How frequently do global dust storms occur on Mars? I know there was one in 2001 and one in 1971 but that's all I'm aware of. Surely there must have been many more recorded in the last century. The odds on a major planet encircling storm seem to be around 20% per Martian year or one every decade or so for us Earthlings. The last global storm was in 2001 - heres a nice write up and animation from TES . Previous major storms were seen in 1909, 1924, 1956, 1971, 1973, 1975, 1977 (twice) and 1982 although apparently only the 1971 event is considered global in that it obscured the whole planet apart from the tops of the Tharsis peaks. Nice write up here by Jeff Beish There was a fairly significant non planetwide storm in 2003 that was concentrated in Hellas and lasted for most of December 2003. |
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