Path: csiph.com!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: Greg Goss Newsgroups: alt.astronomy,sci.physics,sci.physics.relativity,rec.arts.sf.written Subject: Re: protect-earth-from-asteroids Date: Thu, 14 Jan 2016 04:59:23 -0700 Lines: 36 Message-ID: References: <56952E1D.38D8@ix.netcom.com> Reply-To: gossg@gossg.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Trace: individual.net oZKLwOoZCGOxcvD/7Ojqdwkc7kFaWsevA2Uvfi4ERKFv/JPfsQ Cancel-Lock: sha1:7YvxyF2OlujurU604Bvxttg8msc= X-Newsreader: Forte Agent 1.93/32.576 English (American) Xref: csiph.com alt.astronomy:281151 sci.physics:545310 sci.physics.relativity:373915 rec.arts.sf.written:430854 "J. Clarke" wrote: >> Lesser impacts have caused widespread, if not actually global, damage. A >> meteor could easily take out an entire city, killing millions of people. > >It could do worse than that. >Take a look at 51° 19.744' N 68° 41.193' W in Google Earth. That >feature, roughly 60 miles in diameter, is a 200 million year old meteor >crater. > >Imagine if that hit, say, Hartford. Hartford goes, and Springfield, and >New Haven, and while they aren't actually going to be inside the crater, >New York and Boston are both going to pretty much cease to exist, and >most of the east coast is going to be in much the same condition as it >might be after a nuclear attack, minus the radiation. > >And it gets worse--there's reason to believe that it was a multiple >impact with addtional strikes in France, Ukraine, North Dakota, and >Manitoba. Wikipedia says it's the SIXTH largest such crater, though it's the largest easily visible one. When I entered the co-ordinates into google maps, I had to back out three times before the structure became visible. The Manicouagan wiki page says "It was once thought to be associated with the end-Carnian extinction event." but the Carnian page says "Its boundaries are not characterized by major extinctions or biotic turnovers, " So was there or was there not an extinction event at the end of the Carnian, before we can assign it to the Manicouagan and friends impacts. -- We are geeks. Resistance is voltage over current.