Space weather starts at the sun. It begins with an eruption such as a huge burst of light and radiation called a solar flare or a gigantic cloud of solar material called a coronal mass ejection (CME). But the effects of those eruptions happen at , or at least near-Earth space. Scientists monitor several kinds of space "weather" events -- geomagnetic storms, solar radiation storms, and radio blackouts – all caused by these immense explosions on the sun
One of the most common forms of space weather, a geomagnetic storm refers to any time Earth's magnetic environment, the magnetosphere, undergoes sudden and repeated change. This is a time when magnetic fields continually re-align and energy dances quickly from one area to another.
Geomagnetic storms occur when certain types of CMEs connect up with the outside of the magnetosphere for an extended period of time. The solar material in a CME travels with its own set of magnetic fields. If the fields point northward, they align with the magnetosphere's own fields and the energy and particles simply slide around Earth, causing little change. But if the magnetic fields point southward, in the opposite direction of Earth's fields, the effects can be dramatic. The sun's magnetic fields peel back the outermost layers of Earth's fields changing the whole shape of the magnetosphere. This is the initial phase of a geomagnetic storm.
The next phase, the main phase, can last hours to days, as charged particles sweeping into the magnetosphere accumulate more energy and more speed. These particles penetrate closer and closer to the planet. During this phase viewers on Earth may see bright aurora at lower latitudes than usual. The increase – and lower altitude – of radiation can also damage satellites traveling around Earth.
The final stage of a geomagnetic storm lasts a few days as the magnetosphere returns to its original state.
Geomagnetic storms do not always require a CME. Mild storms can also be caused by something called a corotating interaction region (CIR). These intense magnetic regions form when high-speed solar winds overtake slower ones, thus creating complicated patterns of fluctuating magnetic fields. These, too, can interact with the edges of Earth's magnetosphere and create weak to moderate geomagnetic storms.
Geomagnetic storms are measured by ground-based instruments that observe how much the horizontal component of Earth's magnetic field varies. Based on this measurement, the storms are categorized from G1 (minor) to G5 (extreme). In the most extreme cases transformers in power grids may be damaged, spacecraft operation and satellite tracking can be hindered, high frequency radio propagation and satellite navigation systems can be blocked, and auroras may appear much further south than normal.
Solar Radiation Storms
A solar radiation storm, which is also sometimes called a solar energetic particle (SEP) event, is much what it sounds like: an intense inflow of radiation from the sun. Both CME's and solar flares can carry such radiation, made up of protons and other charged particles. The radiation is blocked by the magnetosphere and atmosphere, so cannot reach humans on Earth. Such a storm could, however, harm humans traveling from Earth to the moon or Mars, though it has little to no effect on airplane passengers or astronauts within Earth's magnetosphere. Solar radiation storms can also disturb the regions through which high frequency radio communications travel. Therefore, during a solar radiation storm, airplanes traveling routes near the poles – which cannot use GPS, but rely exclusively on radio communications – may be re-routed.
Solar radiation storms are rated on a scale from S1 (minor) to S5 (extreme), determined by how many very energetic, fast solar particles move through a given space in the atmosphere. At their most extreme, solar radiation storms can cause complete high frequency radio blackouts, damage to electronics, memory and imaging systems on satellites, and radiation poisoning to astronauts outside of Earth's magnetosphere.
Radio blackouts occur when the strong, sudden burst of x-rays from a solar flare hits Earth's atmosphere, jamming both high and low frequency radio signals. The X-rays disturb a layer of Earth's atmosphere known as the ionosphere, through which radio waves travel. The constant changes in the ionosphere change the paths of the radio waves as they move, thus degrading the information they carry. This affects both high and low frequency radio waves alike. The loss of low frequency radio communication causes GPS measurements to be off by feet to miles, and can also affect the applications that govern satellite positioning.
Radio blackouts are rated on a scale from R1 (minor) to R5 (extreme). The strongest radio blackouts can result in no radio communication and faulty GPS for hours at a time.
Image Credit: NASA
Explanation of the image from: http://www.nasa.gov/mission_pages/sunearth/news/storms-on-sun.html
3 lbs. Ground Meat Blend (1.5lbs. Brisket, .75lbs. Veal, .75lbs. Pork)
1 Onions (dice and sweat)
2 Cloves Garlic (dice and Sweat)
3/4 cup Parsley (Chiffonade)
1 Sprig Thyme
4 oz White Bread Soaked in 3 cups Milk
1 tblsp Paprika
1 tsp Cayenne
1/3 cup Parmesan
1. Combine all of the ingredients and mix once. Do not overwork the meat as that will make the meat tough.
2. Roll into balls and roast the meatballs at 500*f for 10 minutes.
3. Add the meatballs to the sauce and simmer for 30 minutes.
2 quarts Tomato sauce
1 qt Ketchup
1 Tbsp Chili Powder
1 pint Dry Cranberries
8 oz. Light Brown Sugar
Lemon juice to Season
salt and pepper to taste
Tomato Sauce Ingredients
1 onion, chopped
1 cup olive oil
2 quarts canned plum tomatoes, drained
1 bunch basil
salt to taste
1. Sweat the onion in the olive oil till translucent.
2. Add the tomatoes and simmer for 30 minutes.
3. Add the remaining ingredients and simmer for 15 minutes longer.
"Android applications have historically been limited to a maximum size of 50MB. However, some types of apps, like high-quality 3D interactive games, require more local resources.
So today, we’re expanding the Android app size limit to 4GB."
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