Re: DIY SF

In article <4658C8C3.30803@[EMAIL PROTECTED]
>, Sea Wasp
<seawaspObvious@[EMAIL PROTECTED]
> wrote:

> lal_truckee wrote:
> > mimus wrote:
> > 
> >> OK, a couple dozen quarter-mile-wide steel balls just fell from outer
> >> space onto the Earth, and that was that, nothing else.
> > 
> > 
> > Doesn't matter to us - we're gone.
> 
>  I don't think so. Minor damage. Takes a lot more than that to kill us 
> off.

If no-one has mentioned it, here's a good site
http://www.lpl.arizona.edu/impacteffects/
At typical asteroid velocity of 17 km/s, each impact is only about 10
gigatonne .  Seismics would be like a Richter 6.6.

-- 
David M. Palmer  dmpalmer@[EMAIL PROTECTED]
 (formerly @[EMAIL PROTECTED]
 @[EMAIL PROTECTED]
)