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Video – Now that is shocking

I found an amazing video today showing a volcano in Papua, New Guinea. As the volcano erupts it sends out an amazing shockwave which you can see radiate out and second later hits the people videoing the eruption, nature is fantastic.

I thought I would look for some more videos of shockwaves:

A shockwave is a rapid change in air pressure produced by the initial explosion made by the volcano. The shockwave will radiate outwards in all directions at the speed of sound.

In dry air at 20 °C (68 °F), the speed of sound is 343 metres per second (1,125 ft/s). This is 1,234 kilometres per hour (666 kn; 767 mph), or about a kilometer in three seconds or a mile in five seconds.

http://en.wikipedia.org/wiki/Speed_of_sound

The shockwave itself consists of air rising very rapidly followed by a drop in air pressure after it passes. As the air pressure drops, it loses its ability to hold moisture and clouds form. The clouds are only temporary and soon disappear when the air pressure returns to that of its surroundings.

Here is a another video that shows a visual shockwave:

Everyone remembers the disruption to air traffic back in April 2010 cause by Icelandic Volcano Eyjafjallajökull. The volcano produced some amazing visual shockwaves:

Amazing and astoundingly beautiful.

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Video – Kuroshio Sea – 2nd largest aquarium tank in the world

Shot at the Okinawa Churaumi Aquarium 

The main tank called the “Kuroshio Sea” holds 7,500-cubic meters (1,981,290 gallons) of water and features the world’s second largest acrylic glass panel. Whale sharks and manta rays are kept amongst many other fish species in the main tank.

This was shot using a Canon 5DMKII with a 28-135mm lens.

More videos by John Rawlinson here

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