Inflammatory bowel disease refers to a number of disorders that cause chronic inflammation of the digestive tract. 1  Crohn's disease and ulcerative colitis are most common; their symptoms include: 2  swelling and sores along the tissue lining the digestive tract; 3  abdominal pain; 4  frequent diarrhea; and, 5  rectal bleeding.
Depiction of the northern auroral oval from the Ovation site on July 15, 2013. Southern Canada and the northern fringe of the U.S. were under the oval with northern lights visible. The red âview lineâ shows how far south the aurora could be seen that night.
the aurora depends on where in the magnetosphere the electrons came from and on what caused them to precipitate into the atmosphere. Dramatically different auroral shapes can be seen in a single night. Where can I see the aurora? Auroras usually occur in ring-shaped areas centered around the magnetic poles of Earth. The complete rings, called the auroral ovals, can only be seen from space. False color picture of the auroral oval in ultraviolet light. The brighter the color, the more intense the aurora. The crescent of color on the left is from sunlight scattered over the upper atmosphere. The best places to see the aurora are in Alaska, Canada, and Scandinavia, during the late evening hours. Resident of the northernmost United States â near the Canadian border â typically see auroras several times a year. On rare occasions â perhaps once per decade â auroras are visible as far south as Florida or Japan.