(meteorobs) [VLF_Group] Chelyabinsk Fireball and electrophonic"noise."

[drobnock]

Hi
With the current interest in the Perseids, I was reviewing older
meteorobs post. Your was interesting. The information presented about
Stetson, 1934, Earth, Radio, and the Stars is similar to G. Hawkins
(1958).  The emission of electromagnetic noise from a meteor can be
found back to the early days of radio or wireless, Udden, 1917, Texas
Meteor, Univ of Texas Bulletin no. 1772,45-47 and Nininger, 1934, Sound
from ether waves.,  Pop. Astronomy, 47, 97-99. For a more intensive
bibo. see works of C. Keay.

George John Drobnock


Please see: http://adsabs.harvard.edu/full/2002JIMO...30..152D
RE: Title: VFL (sic)  Signatures from non-fireball meteors --
Observations from the 2001 Leonid shower
Authors: Drobnock, G. J.
Journal: WGN, Journal of the International Meteor Organization, vol. 30,
no. 5, p. 152-156

George John Drobnock

Bob Culbertson wrote:

> This passage of a brilliant meteor and an extraneous sound in the
> receiving circuit has been known since 1921. Page 225 of the first
> attachment.The second attachment page 226 at the top; with passage of
> a meteor a sharp hiss that began and ended with the meteor.Note the
> frequency here is not VHF or even HF but rather at LF with a CW coast
> station transmitting in Bordeaux France observed in Seabrook Beach New
> Hampshire.Last attachment may help explain the propagation mode;
> Meteor Induced Sporadic E.Using 'Radio-Eyes' and going back to August
> 29, 1921, I found the propagation direction did not come from the
> Perseids as mentioned here but rather the kappa Cygnids that actually
> passed through the Perseids on their way West.Amazing the things we
> can do today. Equally amazing is what we have lost.Bob WA3YGQ
>
> On Wed, Apr 3, 2013 at 12:00 AM, Cliff Sojourner <cls at employees.org>
> wrote:
>
>
>      my friend is an avid astronomer and chases eclipses and
>      meteor showers
>      and such...
>
>      he assures me there is a sound, a hissing sound, from the
>      brightest
>      meteors.  he likes to go to the quietest place in the Sierra
>      Nevadas
>      during the busiest showers, watch and photograph, and
>      especially
>      listen.  He resents getting old, the sound is elusive now...
>
>      Cliff K6CLS  CM87
>
>      On 2013-04-02 08:09, drobnock wrote:
>      > If this was presented earlier,  sorry.
>      >
>      > On a forum identified as Nasa Space Flight .com there was
>      a question
>      > asked about the Chelyabinsk Fireball and electrophonic
>      "noise."
>      > According to the article presented from Russia, 27
>      individuals heard a
>      > hissing during the event. Note the question marks are part
>      of the
>      > Russian Text. with rough translation from an on line
>      survey about the
>      > event.
>      >
>      > George John Drobnock
>      >
>      > Question posted  2/17/2013 on the Nasaspaceflight.com.
>      > ""I would also be very interested in eyewitness reports of
>      electrophonic
>      > sound PRIOR to the acoustic shock -- that is, during the
>      brightest
>      > flaring of the fireball. This is a at-long-last
>      well-established effect
>      > of plasma-generated radio noise coupling into
>      near-observer physical
>      > objects and creating a hissing or whooshing sound. It
>      occurs simo with
>      > the visual flares, seems to come from 'all around' [not
>      from above], has
>      > been reported for centuries by some bright fireball
>      witnesses and
>      > pooh-poohed by scientists until work by Colin Keay and
>      others
>      > established its validity.""
>      >
>      > Later Response posted.
>      >
>      > http://www.chel-meteorit.youini.ru/
>      > Approximate translation: Profile observations falling
>      meteorite
>      > Chelyabinsk February 15, 2013
>      >
>      > http://chelyabinsk.ru/text/newsline/625214.html
>      > is titled
>      > **?????, ???????????? ??? ???????????, ????????
>      «????????»**
>      > **Chelyabinsk Fireball turned out to be "sounding"**
>      >
>      > ""Article says 27 eyewitnesses independently noted that
>      they heard weak
>      > but clear hissing sounds DURING the flight. Many of them
>      compared the
>      > sound with "Bengal sparkler" (Popular in Russia type of
>      hand-held light
>      > firework) and noted that could not determine neither the
>      source of
>      > hissing nor direction it came from.
>      >
>      > This information was gathered via internet-form for
>      eyewitness reports
>      > here:
>      > http://www.chel-meteorit.youini.ru/
>      > I'd like to note that there is no direct question in the
>      form about this
>      > effect, the respondents were NOT prompted to describe it,
>      they all did
>      > it in "Additional Comments" field.""
>      >
>      > http://chelyabinsk.ru/text/newsline/625214.html
>      > http://forum.nasaspaceflight.com/index.php?topic=31118.465
>
>      >
>      >
>
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