Condensation - Massive release of heat rising though the colder upper layers of the atmosphere. Super cell thunderstorms that spawn tornadoes create the same thing. Please Register or Log in to view the hidden image! Please Register or Log in to view the hidden image!
Its so pretty. I can understand now why people just stop and stare instead of running hell for leather
Yeah, I know I'm guilty. I'm from the midwestern U.S. It's like watching a nuclear explosion in slow motion. You can tell it's the same kind of thing. Anything that makes this shape in the atmosphere is bad...very bad. Ivy Mike U.S. test - Please Register or Log in to view the hidden image! 1989 Redoubt Eruption - Please Register or Log in to view the hidden image! Supercell Thunderstorm Please Register or Log in to view the hidden image!
That wouldn't be very fast, the tunneling machine, depening upon the type of rock it encounters, can tunnel over 50 feet a day!
Plesase view... http://www.youtube.com/watch?v=yFHrI3HFMDg A tunnel boring machine (TBM) is a machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata. They can bore through hard rock, sand, and almost anything in between. Tunnel diameters can range from a metre (done with micro-TBMs) to 19 metres. Tunnels of less than a metre or so in diameter are typically done by horizontal directional drilling rather than TBMs. Tunnel boring machines are used as an alternative to drilling and blasting (D&B) methods in rock and conventional 'hand mining' in soil. A TBM has the advantages of limiting the disturbance to the surrounding ground and producing a smooth tunnel wall. This significantly reduces the cost of lining the tunnel, and makes them suitable to use in heavily urbanized areas. The major disadvantage is the upfront cost. TBMs are expensive to construct, difficult to transport and require significant infrastructure. The biggest is built by Herrenknecht AG of Schwanau, Germany to dig the 57km Gotthard Base Tunnel. It has a diameter of 19 meters. http://en.wikipedia.org/wiki/Tunnel_boring_machine
Very true, anything with enough energy to reach the stratosphere and spread out is not somehing you want to be too close to Please Register or Log in to view the hidden image!
Yeah. The energy source is a similar massive release of heat. A hydrogen bomb releases heat quickly in a concentrated area, and a Volcano eruption does the same thing. But the mechanism for a Supercell doing this is not so visible at first to the naked eye. A layer of warm moist air gets trapped under an advancing cold front called a dry line. This trapping of warm air I believe is called a "convection cap" At the point this cap or covering "lid" breaks all the warm air trapped beneath it suddenly escapes though that point, rising and creating the same mushroom cloud effect as the Volcano or H-bomb. Like pulling the plug on an upside down bathtub drain. F-4's and F-5's created by this kind of disturbance don't die when the sunlight stops heating the ground at night. They can keep going for hours long after dark. From my experience, the ones at night are the scariest. Greensburg, Ks. 2007 - Haysville, Ks. 1999 - Udall, Ks 1955 Little towns entirely wiped from the map in their sleep. One strange statistic about these after-dark F-5 monsters... Unlike most tornadoes, many of these move straight north from the south. 99% of tornadoes move to the Northeast or Southeast. If you see a red blob on the radar some night moving straight north after dark... Take that one seriously.
What is Mount Redoubt's periodicity? (length of time between eruptions) and how regular is the timing?
last one was 12/89 to 4/90. I wonder if there is a link between their Alaskan volcano and the one in Japan that is rumbling. They are both in the ring of fire. I wonder if they are on the same plate. :shrug:
