How to Find and Photograph Aurora Borealis (Northern Lights)
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Description: Describes equipment, techniques, prediction of visibility. Includes a brief description of the phenomenon and some photographs.
How to find and photograph Aurora Borealis How to Find and Photograph Aurora Borealis (Northern Lights) Coronal Mass Ejections (CME’s) : CME’s are usually associated with solar flares and prominence eruptions. The corona is a gaseous region above the Sun’s surface that extends millions of miles into space. Amazingly, temperatures in the corona may be up to 200 times hotter than the actual surface of the Sun. Large bubbles of hot plasma within the corona are usually threaded with magnetic field lines that rise up out of one sunspot and arch back to reconnect at another nearby spot. A good analogy would be to envision a net holding down a helium balloon. Sometimes, these magnetic field lines merge and cancel each other out, causing a hole in this “magnetic net”. The result may be as much as 10 billion tons (equivalent to the weight of 27,000 Empire State Buildings) of hot plasma ejected for several hours at speeds approaching 1 to 5 million miles per hour. Due to the sheer speed and mass, the energy released can approach that of nearly 10 million volcanic explosions or 100 hurricanes! When an Earth directed CME cloud collides with our magnetosphere, the electrons, protons, and oxygen ions of Earth’s Van Allen radiation belts become denser, hotter, and faster. The motion of these particles can produce nearly one million amperes of electrical current and disrupt the strength of Earth’s magnetic field enough to allow some of the excited particles to crash into our upper atmosphere, about 40 to 200 miles above the Earth. Oxygen and nitrogen atoms react to the bombardment by becoming electrically excited and emit light. Voila! The world’s largest fluorescent lamp… Aurora!
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| Page title: | How to find and photograph Aurora Borealis |
| Keywords: | northern lights, northern, lights, aurora, aurora borealis, photo, photographs, photographing, images, venhaus |
| Description: | How to find and photograph Aurora |
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