The northern lights, or aurora borealis, offer an entrancing, dramatic, magical display that fascinates all who see it — but just what causes this dazzling natural phenomenon?
At the center of our solar system lies the sun, the yellow star that sustains life on our planet. The sun's many magnetic fields distort and twist as our parent star rotates on its axis. When these fields become knotted together, they burst and create so-called sunspots. Usually, these sunspots occur in pairs; the largest can be several times the size of Earth's diameter.
At the center of the sun, the temperature is 27 million degrees Fahrenheit (15 million degrees Celsius). As the temperature on its surface rises and falls, the sun boils and bubbles. Particles escape from the star from the sunspot regions on the surface, hurtling particles of plasma, known as solar wind, into space. It takes these winds around 40 hours to reach Earth. When they do, they can cause the dramatic displays known as the aurora borealis. [Infographics: How the Northern Lights Work & Anatomy of Sun Storms & Solar Flares]
1. October 1st 2012
2. Some reasons include: it’s important to notify supervisor during significant incidents which may impact field unit citizens or communication center. Agency protocols will dictate the specific notifications which must be made. Failure to make notifications can jeopardize public and response safety. Some reasons for notifications include : 1. notifying the appropriate chain of command for agency policy 2.requesting additional resources in response to significant incidents. 3.reporting violent incidents in the workplace for facilitating situational awareness among others .5. passing on information to other shift supervisors coworkers etc.
Improved circulation.
Higher blood pressure, stiff muscles, and faster heart rate are all signs of unhealthiness, unless you have exercises recently.
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