[meteorite-list] Earth Impactors
From: Matson, Robert <ROBERT.D.MATSON_at_meteoritecentral.com>
Date: Thu Apr 22 10:00:10 2004 Message-ID: <AF564D2B9D91D411B9FE00508BF1C86901B4E25E_at_US-Torrance.mail.saic.com> This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C23381.57783A50 Content-Type: text/plain; charset="iso-8859-1" Hi Walter, The biggest unknown to your question is how wide is your "wide destruction zone?" Are we talking city blocks, small cities, large cities or small countries? Going with large cities, I'd put my WAG at somewhere between 200 and 500 meters in diameter, depending on material type. For example, wasn't the iron that created Meteor Crater estimated to be about 150 meters in diameter? Scaling up to 200 meters diameter more than doubles the energy of the impact -- enough I would think to wipe out a large metropolitan area. --Rob ------_=_NextPart_001_01C23381.57783A50 Content-Type: text/html; charset="iso-8859-1" <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> <META content="MSHTML 5.00.3315.2870" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT color=#0000ff face=Arial size=2><SPAN class=697211502-25072002>Hi Walter,</SPAN></FONT></DIV> <DIV><FONT color=#0000ff face=Arial size=2><SPAN class=697211502-25072002></SPAN></FONT> </DIV> <DIV><FONT color=#0000ff face=Arial size=2><SPAN class=697211502-25072002>The biggest unknown to your question is how wide is your "wide destruction zone?"</SPAN></FONT></DIV> <DIV><FONT color=#0000ff face=Arial size=2><SPAN class=697211502-25072002>Are we talking city blocks, small cities, large cities or small countries? Going with</SPAN></FONT></DIV> <DIV><FONT color=#0000ff face=Arial size=2><SPAN class=697211502-25072002>large cities, I'd put my WAG at </SPAN></FONT><FONT color=#0000ff face=Arial size=2><SPAN class=697211502-25072002>somewhere between 200 and 500 meters in diameter,</SPAN></FONT></DIV> <DIV><FONT color=#0000ff face=Arial size=2><SPAN class=697211502-25072002>depending </SPAN></FONT><FONT color=#0000ff face=Arial size=2><SPAN class=697211502-25072002>on material type. For </SPAN></FONT><FONT color=#0000ff face=Arial size=2><SPAN class=697211502-25072002>example, wasn't the iron that created Meteor Crater</SPAN></FONT></DIV> <DIV><FONT color=#0000ff face=Arial size=2><SPAN class=697211502-25072002>estimated to be about 150 meters </SPAN></FONT><FONT color=#0000ff face=Arial size=2><SPAN class=697211502-25072002>in diameter? Scaling up to 200 meters diameter</SPAN></FONT></DIV> <DIV><FONT color=#0000ff face=Arial size=2><SPAN class=697211502-25072002>more than doubles the energy of the impact -- enough I would think to w</SPAN></FONT><FONT color=#0000ff face=Arial size=2><SPAN class=697211502-25072002>ipe out a</SPAN></FONT></DIV> <DIV><FONT color=#0000ff face=Arial size=2><SPAN class=697211502-25072002>large metropolitan area. --Rob</SPAN></FONT></DIV></BODY></HTML> ------_=_NextPart_001_01C23381.57783A50-- Received on Wed 24 Jul 2002 10:16:53 PM PDT |
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