Discover and read the best of Twitter Threads about #tunguska

Most recents (7)

Whenever I look at Bunch et al #Sodom #airburst paper I find more problems. I already documented the authors’ profound misunderstanding of airbursts (see link). Now I see that they get much of their information about #Tunguska from creationist literature.
In their subsection entitled “Comparison to Tunguska cosmic airburst” they make several false assertions. In re-reading it today, another claim jumped out at me: “The airburst generated a pressure wave that toppled or snapped >80 million trees, some up to 1-m in diameter..” Image
I wasn’t aware that there were any trees a meter in diameter that had been toppled. I didn’t see any meter-wide trees when I visited explored the Siberian taiga in the blast zone 13 years ago. None of the surviving trees we cored were that big.
Read 13 tweets
As I continue my quest to find the paper “Kletetschka, G., Radana, K. & Hakan, U. Evidence of shock-generated plasma’s demagnetization in the shock-exposed rocks. Sci. Rep. (2021)” that was cited by #TEHbust, the #TallElHammam #BiblicalArchaeology paper, I'll discuss #Tunguska. Image
The Sodom & Gomorrah airburst team cited this in support of their claim that a Tunguska-like airburst can generate shocked quartz, even though—according to experts on shocked quartz—none has ever been found that is associated with #Tunguska. Shocked quartz looks like this. Image
I met the lead author, Gunther Kletetschka, in Russia in 2008 and we enjoyed time together doing field work in the destruction zone of the 1908 #Tunguska airburst. It was for a Discovery Channel documentary shoot on June 30, 2008: the 100th anniversary of #AsteroidDay Image
Read 36 tweets
The title of the paper I’m critiquing is "A Tunguska sized airburst destroyed Tall el-Hammam a Middle Bronze Age city in the Jordan Valley near the Dead Sea." I’m tagging it #TEHburst to help keep track of these threads. To understand the paper, we need talk about #Tunguska.
At this juncture I would like to invite any of my colleagues who are experts in any of the fields I’m talking about to jump in with comments. If I make more mistakes, get something wrong, or forget a detail that you know, please correct me.
I attended the "100 years of the Tunguska phenomenon: past, present, future” conference in Moscow on June, 2008. I learned a lot of science, but I also learned a lot of backstory about the history of the “Tunguska phenomenon,” which is what the Russians call it.
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#Hydronomastics is the study of #hydronyms, the proper names of bodies of water.

It's a branch of #toponomastics, the study of #toponyms (the proper names of places), which in turn is a branch of #onomastics, the study of #orthonyms (proper names).

French / Luxembourghish sign: The River Sauer in Martelan...
#Hydronym and #hydronomastics both derive from Ancient #Greek ὕδωρ / húdōr (water) + ὄνομα / ónoma (name). The Greek island of Skiatho...
#Hydronyms tend to outlast other #toponyms, even when new #languages and cultures displace earlier ones.

#England, #EastAnglia, #Essex, and #Sussex are named for the #Angles and #Saxons; but #Trent, #Ouse, #Thames, #Severn, and #Avon are older #Celtic and #RomanoBritish names. A map showing the main rive...
Read 173 tweets
Como ya hemos mencionado, existen #asteroides (y #cometas de periodo corto) que se localizan en regiones cercanas a la Tierra o #NEAs, por sus siglas en inglés y se dividen en 4 grupos. Image
Los Asteroides Potencialmente Peligrosos (PHAs) son aquellos que tienen potencial de acercarse más a la Tierra🌎(distancia ≤ 0.05 UA) y tamaño >140 m. En caso de haber colisión, pueden causarse desastres locales 💥como en #Tunguska o catástrofes como la extinción de especies.
Los NEAs son monitoreados constantemente👩🏻‍💻 Se pone más atención a los 157 PHAs que miden >1km. Se han ideado varias alternativas si es que existiera alerta por un PHA, como armas termonucleares. Aquí puedes ver los objetos que se aproximarán en estos días.
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¡Es hoy, es hoy! A raíz del evento de Tunguska, en 1908, se ha decretado el 30 de junio como el #DíaDelAsteroide #AsteroidDay ☄️💥🌏 Image
Aún se debate si el bólido fue un asteroide (quizá metálico) o un cometa. El objeto explotó antes de llegar al suelo, liberando gran energía y se estima que pudo tener un rango de tamaño de entre 60 y 1000 m de diámetro. #DíadelAsteroide #Tunguska… Image
Este increíble suceso ahora nos invita a conocer a los asteroides más allá de los daños potenciales que puedan ocasionar, como el entender qué son, dónde están y por qué son importantes para la ciencia y para todos ☄️🌏🔭📚 #AsteroidDay #DiadelAsteroide Image
Read 3 tweets
#Tunguska AD
I love Air defense systems,
In my beginnings, I started to read about #Egypt modern wars, then I realized through my readings that our AD was one the biggest reasons of our victory in October 1973 war, at that time,

I noticed that the AD in October war suffered from few issues like :

1- Most of our AD weapons were stationed like SA-2 & SA-3.

2- Only the SA-6 radar & launchers were tank tread vehicles & the other units like transloader, crane, P-15,

PRV-16 radars were wheeled vehicles, which means they will have difficulties moving in desert area.

3- Time to setup SA-6 unit for engagement also have limitation in attacking very low or high-altitude targets.

Read 13 tweets

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