In reply to  Jed Rothwell's message of Mon, 9 Mar 2009 20:47:53 -0400:
Hi,
[snip]
>Robin van Spaandonk wrote:
>
>
>> Evacuate a city, which is approximately the amount of damage a 1 MT blast
>> would
>> do.
>
>
>One week ahead of time, could they determine with enough accuracy where the
>object will strike? Or would they have to say: 'evacuate everyplace from X
>west to Y'?
>
>I do not know enough about astronomy to judge.

I think after tracking it for 1 or 2 days they could come pretty close, and the
closer it got the more accurate their determination. One could start by
beginning to evacuate people from  what would most likely be the impact point. 

If the zone was initially large, you could provide a general warning, and
suggest that those who were able, leave. This might be applicable if the zone
were to include e.g. the whole Eastern seaboard, but make clear that only a city
sized area would ultimately be affected. That gives people a sense of their
chances of survival if they stay put. It also ensures that those who are in a
position to leave early do so, thus limiting the last minute congestion.

Regards,

Robin van Spaandonk

http://rvanspaa.freehostia.com/Project.html

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