Not see these pictures before.http://www.dailymail.co.uk/news/article-2282330/I-thought-nuclear-bomb-exploding-Photographers-breathtaking-pictures-Russian-meteorite-feared-live-through.html
Massive impact forming the Wilkes Land Crater in Antarctica
- Eruption of the Siberian Traps. - Major anoxic event in the oceans (possibly as a consequence of climate change)- Vast release of H2S from oceans (probably a consequence of no. 2, anoxic situation and lots of dead organic stuff), leading to a poisoning of life on land- Massive release of CH4 from methane clathrates in the ocean
It seems there were actually 3 extinction pulses, spread out over a total of 100'000 years...
Fiscal restraint, aka not making investments.
Quote from: Prober on 02/21/2013 02:48 pmYou couldn't want to blast and create a debris field. The advantage of cracking an incoming meteor is the smaller the bits, the higher up the bits breakup. Chelyabinsk was ~500 kt at ~30km, if it had been 500 kt at a couple of km the outcome would have been much more tragic. You still will have the same amount of energy released, it just be at a higher altitude. An end game that attempts to crack them just before entry could save lives from the 10m plus objects.
You couldn't want to blast and create a debris field.
The suspects (who may all be guilty):- Eruption of the Siberian Traps. One of the most massive volcanic events in the past billion years, released a lava flow that covered much of present Siberia, and probably dumped immense quantities of CO2 into the atmosphere. Mean global temperature probably rose by at least 10 degrees F due to this alone. These eruptions correlate very well with the first extinction pulse.- Massive release of CH4 from methane clathrates in the ocean
Quote from: Robotbeat on 02/22/2013 02:15 pmFiscal restraint, aka not making investments. political statement without understanding. Fiscal restraint = Control of spending (hard to put one out that can't be taken as political)
ProjectB612: If the dinosaurs had a space program, they'd still be here.Fornaro: If the dinosaurs trilobites had fiscal restraint, they'd still be here.
Lazy question as I ponder how to explain what caused the damage to non-techies:What other natural phenomena (not man-triggered events) create airborne sonic shocks?
What other natural phenomena (not man-triggered events) create airborne sonic shocks?
Beans
Quote from: kevin-rf on 02/23/2013 11:53 amBeansI believe those produce choking flows, not choked flows
When you consider that the Earth is about 70% water and 30% land, I feel that we dodged a major bullet that this object did not hold together and impact a large ocean (Pacific or Atlantic basin)Have any calculations been made to try to predict what size of tsunami this kind of object would have produced? When you consider that a chunk of Hawaii falling into the ocean is suspected of triggering a "mega-tsunami" that deposited coral seafloor high on a cliff in Australia, I think this could have been much worse.