Re: (meteorobs) Fwd Query: Impact from New Zealand fireball?

• To: Meteor Observing Mailing List <meteorobs@jovian.com>
• Subject: Re: (meteorobs) Fwd Query: Impact from New Zealand fireball?
• From: Rob McNaught <rmn@aaocbn.aaodot gov.au>
• Date: Sat, 10 Jul 1999 09:16:56 +1000 (EST)
• cc: tret <tret@cebu.fapenet.org>
• In-Reply-To: <199907092219.AA18982@trilliandot dev.latrade.com>
• Reply-To: meteorobs@jovian.com
• Sender: owner-meteorobs@jovian.com

With large fireballs that penetrate low in the atmosphere, the sonic booms
are so intense that ground coupling of the sound causes seismometers to
shake.  It is a common fallacy that a seismometer recording means an
impact.  It would only be a large body relatively close to a seismometer
that would be recorded as an impact, not a run of the mill football sized
object at many kilometer distance.

Cheers, Rob

>  - how come seismographs picked up some form of activity when the meteor
> was alleged to have exploded in the atmosphere
> 
>  - was there an impact? if so .. where is the crater ?
> 
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• (meteorobs) Fwd Query: Impact from New Zealand fireball?
• From: Lew Gramer <dedalus@latrade.com>

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