(meteorobs) Major TX, OK, AR, MO, KS, CO, NE Green Fireball Meteor ~9:21CDT 23MAR2011

[Wayne Hally]

Pete,
Electrophonics are sounds that occur simultaneous with the meteor, generally
hissing or crackling sounds. To happen at the same time, they must be radio
waves of some kind, since they travel at "c", the speed of light (and all
electromagnetic radiation). It's a difficult subject to research, because
fireballs that produce them are so rare, and respecting Murphy's Law, the
proper equipment to make measurements is almost never in place. So it's
mostly anecdotal evidence. Some targeted research was conducted during the
Leonid storms around the 2000 period, I have yet to see a peer reviewed
article with results...hope there will someday be one. If anyone knows of
any, please let me know!!

Sonic Booms are produced from the shock wave of the meteoroid passing
through the air at supersonic speeds, or the detonation of the object as it
is disrupted by the aerodynamic pressures. Since this occurs at some height
above the surface, the arrival of the sound occurs minutes later, since
sound travels about a mile in 5 seconds. So if is produced at 30 miles above
the surface, the boom will happen 2 1/2 minutes after the fireball itself.
Since these are acoustic events, they can be detected by barometers and even
seismographs, so there are better records. Unfortunately, most naïve
witnesses to fireballs don't know to listen for a few minutes after the
event, so many useful reports are lost.

Wayne

-----Original Message-----
From: meteorobs-bounces at meteorobs.org
[mailto:meteorobs-bounces at meteorobs.org] On Behalf Of Pete Pete
Sent: Friday, March 25, 2011 2:40 AM
To: meteorobs at meteorobs.org
Subject: Re: (meteorobs) Major TX, OK, AR, MO, KS, CO, NE Green Fireball
Meteor ~9:21CDT 23MAR2011


Hello, Chris,
 
As an amateur eager to learn, and I know what the differences are between
the two sounds, what do you mean by acoustic meteors improve the chance of
meteorites over electrophonic?
I haven't come across that fact before.
 
A few years ago I was fortunate enough to hear an electrophonic meteor, and
after an unsuccessful hunt of the nearby area I was positive it fell in, my
obsession with meteorite collecting was born!
That meteor also appeared to have debris breaking off.
 
A thumb size explanation will do, I'll take it from there.
 
Cheers,
Pete

----------------------------------------
> From: clp at alumni.caltech.edu
> To: meteorobs at meteorobs.org
> Date: Thu, 24 Mar 2011 23:03:34 -0600
> Subject: Re: (meteorobs) Major TX, OK, AR, MO, KS, CO, NE Green 
> Fireball Meteor ~9:21CDT 23MAR2011
>
> I certainly did not say there was no chance of meteorites. I only 
> pointed out that in the absence of a multistation analysis, the 
> fireball appears to me typical of what any one camera will capture 
> every month or two, and which in my experience has characteristics 
> that aren't generally associated with objects likely to survive their
atmospheric passage.
>
> I had not heard that sound was reported. If this was acoustic, and not 
> electrophonic, I'd say that improves the likelihood of meteorites 
> considerably. Still, the best estimate would come from a multistation 
> analysis providing an estimate for height, entry angle, and speed.
>
> Chris
>
> *****************************************
> Chris L Peterson
> Cloudbait Observatory
> http://www.cloudbait.com
>
>
> ----- Original Message -----
> From: "drtanuki" 
> To: "Global Meteor Observing Forum" ; "Wayne Hally"
> 
> Sent: Thursday, March 24, 2011 6:33 PM
> Subject: Re: (meteorobs) Major TX, OK, AR, MO, KS, CO,NE Green 
> Fireball Meteor ~9:21CDT 23MAR2011
>
>
> Wayne asked, "Dear Dirk,
> What in the comments makes you say " This put rocks on the ground"?" 
> // "So Dirk, are you going to respond to this question, or continue to 
> ignore It?"
>
> Wayne, I live in Tokyo, Japan and have many pressing matters 
> (Earthquakes (8 all 5.0+ today) and radiation in our food and water) 
> beyond a rapid response to your question. This reply is within about 
> 12 hours so what is your problem?
>
> Do you not see that I maintain a webpage and post and reply to several 
> 100s of emails daily. Thank you for your reminder! BTW, I do this 20 
> hours/ 7 days a week; do you have this kind of dedication for over two 
> years? I am NOT paid or funded for this, I do it because I want others 
> to become involved in fireball study.
>
> The videos (now 4) that I have reviewed, 40 + eyewitness reports and 
> radar data (1 set) all indicate to me that there is a rock(s) to be 
> found (if it will be found is another question).
>
> Yes, this was a green fireball; I know you don`t seem to like them.
> Also there was a sonic report. It takes time for me to analyze and 
> then get posted for all of the Monday Night quarterbacks.
>
> Have a great day Wayne; hopefully someday soon you will get to see a 
> large green fireball in your area; they have been common recently in 
> New Jersey area.
>
> For the record, Chris Peterson does not see any chance for a meteorite 
> to be produced - but he hedged his statement. Rob Matson has not yet 
> commented either way. Jim Gamble is confident that a meteor survived. 
> Marc Fries found a turbulent anomaly in the proposed flight path. No
information from Dr.
> Bill Cooke yet on his data.
>
> Wayne best of luck counting your next shower counts! I can send a new 
> Japanese mechanical pencil if you like?
>
> If I have misunderstood the gist of your questioning please always 
> feel free to email me off list to introduce yourself and your
disagreements.
> Best Always, Dirk Ross...Tokyo
>
> Some people sit and bitch and others get things done...
> Alferd Packer, Colorado Cannibal 1874, Winter
>
>
> _______________________________________________
> Mailing list meteorobs: meteorobs at meteorobs.org To UNSUBSCRIBE, email: 
> owner-meteorobs at meteorobs.org
> http://lists.meteorobs.org/mailman/listinfo/meteorobs

_______________________________________________
Mailing list meteorobs: meteorobs at meteorobs.org To UNSUBSCRIBE, email:
owner-meteorobs at meteorobs.org
http://lists.meteorobs.org/mailman/listinfo/meteorobs