[meteorite-list] Publications of the Carancas event ADDITIONAL

From: Jan Hattenbach <jan.hattenbach_at_meteoritecentral.com>
Date: Wed, 10 Oct 2007 00:33:23 +0200
Message-ID: <1824205238_at_web.de>

I also spoke to quite some peoble and I have no doubt that there was a seismic. I do not question that. I just would like to know who recorded it.
It's just that I am a bit confused by the statement of the geologist.

Jan
> -----Urspr?ngliche Nachricht-----
> Von: Michael Farmer <meteoriteguy at yahoo.com>
> Gesendet: 10.10.07 00:27:26
> An: meteorite-list at meteoritecentral.com
> Betreff: Re: [meteorite-list] Publications of the Carancas event ADDITIONAL


>
> Jan, I interviewed many people, most saw the fall, saw
> a bright flash a small mushroom cloud of steam/dust
> that came up and lingered for some time.
> Everyone felt the grond shake, and heard huge
> explosion. As the meteorite came overhead, there was a
> painful sound of a jet engine, only much louder is how
> most people described it. One man said he was blown
> down be the blast, could be the same guy.
> The sounds were loud enough to break windows in
> Desaguadero and Carancas, and the impact shook the
> ground like an earthquake. Surely this impact would
> show up on seismic.
>
> One note though, there are large mines on the Bolivian
> side of the border, perhaps they blat a lot so seismic
> may not be noticed as much if that is the case.
> Michael Farmer
> --- Jan Hattenbach <jan.hattenbach at web.de> wrote:
>
> > > The Peruvian
> > > seismic measurement was 5 tons TNT.
> >
> > This may sound odd, but where is that number from? I
> > was talking to a geologist of the University of
> > Arequipa, and he told me that they did record
> > nothing at the time of the event.
> >
> > Regards,
> >
> > jan
> >
> > > -----Urspr?ngliche Nachricht-----
> > > Von: "Sterling K. Webb"
> > <sterling_k_webb at sbcglobal.net>
> > > Gesendet: 10.10.07 00:02:42
> > > An: "K. Ohtsuka" <ohtsuka at jb3.so-net.ne.jp>
> > > CC: meteorite-list at meteoritecentral.com
> > > Betreff: Re: [meteorite-list] Publications of the
> > Carancas event ADDITIONAL
> >
> >
> > >
> > > Hi,
> > >
> > > After reading through those other documents
> > > on the Major University of San Andres website
> > > and concluding that they contained nothing we
> > > didn't already know, I realized I hadn't read the
> > > footnotes in the one article that had footnotes,
> > > and indeed I found one new piece of information
> > > in those footnotes: one local inhabitant of
> > Carancas,
> > > Don Gregorio Iruri, was standing only 300 meters
> > > from the point of impact at the time of the
> > impact.
> > >
> > > That's all, a one-sentence footnote. It
> > astounds
> > > me that an "investigator," scientific or
> > otherwise,
> > > had located an eye-witness to as rare an event as
> > > a cosmic impact but did not ask questions nor
> > collect
> > > his story! What did it look like? What did it
> > sound
> > > like? Was there a flash of light? How bright was
> > it?
> > > How strong was the shock wave? How strong was
> > > the wind from the blast? Was he knocked down?
> > > Rolled over? Or did he stay on his feet? Was he
> > > deafened, even slightly? And about 1000 other
> > > questions...
> > >
> > > The closest living witness to a cosmic impact
> > > among the planet's 6.6 billion people and no one
> > > asked him to describe it? Makes me wonder how
> > > justified the second term of the biological name
> > > "Homo sapiens" is. Maybe we should all just stand
> > > around dumbly like cows. Oh, wait! -- we do.
> > >
> > > [In all fairness, the witness may have been so
> > > shaken as to not have had a coherent story, but
> > even
> > > that fact is useful information. They say in
> > reference
> > > to Don Iruri only this: "...podemos concluir que
> > esa
> > > estructura tiene la t?pica caracter?stica de un
> > cr?ter
> > > explosivo." Or, "...we were able to conclude that
> > > this structure has the typical characteristics of
> > an
> > > explosive crater." So he must have described an
> > > explosion. Details would be nice.]
> > >
> > Chris Peterson
> > > has suggested airblast effects exaggerate ground
> > > readings and that 1 to 2 tons TNT is more
> > reasonable.
> > > Now, Brown suggests 30 tons TNT as a measurement.
> > > It's possible Don Iruri's story could narrow that
> > down...
> > > if anybody had asked him.
> > >
> > > The LPI Impact Calculator uses the figure of
> > an
> > > overpressure of 1 pound per sq. inch as a
> > nominally
> > > perceptible blast force (about equal to an
> > instantaneous
> > > gust of 35 mph wind). I tried using the equations
> > from:
> > > http://www.fas.org/man/dod-101/sys/dumb/fae.htm
> > > for air-fuel explosions, an event quite similar to
> > an
> > > impact vaporization. [We are considering only
> > pressure
> > > effects, not flying debris nor any other possible
> > results.]
> > >
> > > The results are that one finds the distance at
> > which
> > > one would experience an overpressure of 1 pound
> > > per sq. inch from a one ton TNT explosion is 158
> > > meters, from a 5 ton event is 270 meters, but from
> > > a 30 ton event is 490 meters and from a one
> > kiloton
> > > event is 1500 meters. [Caveat: every actual blast
> > is
> > > different, affected by surface materials,
> > reflected
> > > waves, and a long list of modifiers, including the
> > > unknown efficiency of kinetic energy conversion
> > > in this impact, so these estimates above have a
> > > potential 2-fold error in distance.]
> > >
> > >
> > > Sterling K. Webb
> > >
> >
> ----------------------------------------------------------------
> > > ----- Original Message -----
> > > From: "K. Ohtsuka" <ohtsuka at jb3.so-net.ne.jp>
> > > To: "Sterling K. Webb"
> > <sterling_k_webb at sbcglobal.net>
> > > Cc: <meteorite-list at meteoritecentral.com>
> > > Sent: Tuesday, October 09, 2007 7:15 AM
> > > Subject: Re: [meteorite-list] Publications of the
> > Carancas event ADDITIONAL
> > >
> > >
> > > Hello Sterling,
> > >
> > > Thank you for letting me know your translation of
> > > the Bolivian publications, which is very
> > interesting.
> > >
> > > Just before, I visited http://spaceweather.com/,
> > > where another latest infrasound analysis of the
> > > Peruvian event by Peter Brown (Univ. W. Ontario)
> > > is introduced. His team estimated the kinetic
> > energy
> > > of the impactor about 0.03 kton TNT.
> > >
> > > Best wishes,
> > >
> > > Kastu
> > >
> > > ----- Original Message -----
> > > From: "Sterling K. Webb"
> > <sterling_k_webb at sbcglobal.net>
> > > To: <meteorite-list at meteoritecentral.com>
> > > Cc: "Rob Matson" <mojave_meteorites at cox.net>; "K.
> > Ohtsuka"
> > > <ohtsuka at jb3.so-net.ne.jp>
> > > Sent: Tuesday, October 09, 2007 9:14 AM
> > > Subject: Re: [meteorite-list] Publications of the
> > Carancas event ADDITIONAL
> > >
> > >
> > > > Hi,
> > > >
> > > > I downloaded all the publications on the site
> > (URL below) and
> > > > started translating then, but...
> > > >
> > > > One is the earlier analysis which I already
> > translated and posted
> > > > a week ago. The two PowerPoint presentations are
> > general
> > > > presentations of craters (very nicely done, BTW
> > -- muy bueno!)
> > > > but don't mention Carancas. One is a
> > press-release style .pdf
> > > > that describes the event and spends a lot of
> > time explaining
> > > > what a meteorite is, that they come from the
> > asteroids, that there
> > > > are craters elsewhere on the planet, that the
> > world is not ending,
> > > > the usual...
> > > >
> > > > There are a few more .pdf are press releases.
> > The only document
> > > > with any "specifics" is their physical estimates
> > of the impact and
> > > > such, all taken from playing with the LPI online
> > Impact Calculator;
> > > > I recognize the language! Like I haven't already
> > done that 300 times
> > > > this last week (and you too).
> > > >
> > > > And if you're keeping score, the Bolivians
> > (unlike the Peruvians)
> > > > got the Universal Time of the event right.
> > > >
> > > >
> > > > Sterling K. Webb
> > > >
> >
> --------------------------------------------------------------------------
> > > ------
> >
> === message truncated ===
>
>


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Received on Tue 09 Oct 2007 06:33:23 PM PDT