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Earth has a magnetic field, too. It forms a bubble around our planet called the magnetosphere, which deflects solar wind gusts. (Mars, which does not have a protective magnetosphere, has lost much of its atmosphere as a result of solar wind erosion.) Earth's magnetic field and the IMF come into contact at the magnetopause: a place where the magnetosphere meets the solar wind. Earth's magnetic field points north at the magnetopause. If the IMF points south -- a condition scientists call "southward Bz" -- then the IMF can partially cancel Earth's magnetic field at the point of contact.
The solar wind is not uniform. Although it is always directed away from the Sun, it changes speed and carries with it magnetic clouds, interacting regions where high speed wind catches up with slow speed wind, and composition variations. The solar wind speed is high (800 km/s) over coronal holes and low (300 km/s) over streamers. These high and low speed streams interact with each other and alternately pass by the Earth as the Sun rotates. These wind speed variations buffet the Earth's magnetic field and can produce storms in the Earth's magnetosphere
CORONAL HOLE:
Extreme UV telescopes onboard the Solar and Heliospheric Observatory (SOHO) are monitoring a dark hole in the sun's atmosphere
Coronal holes are vast regions where the sun's magnetic field opens up and allows the solar wind to escape. A stream of solar wind flowing from this hole is heading for Earth now. Arctic sky watchers should be alert for Northern Lights when it arrives late on March 12th or March 13th.
GRB 090310 2009/03/10 04:32:49.90 Fermi 12:07:00 -38:42:00
GRB 090309B 2009/03/09B 18:25:07.19 Fermi 11:13:00 -55:01:00
GRB 090309A 2009/03/09 23:29:13 Swift 18:59:53.51 -25:15:39.8
GRB 090308 2009/03/08 18:01:23 Swift 12:14:00.28 -48:49:01.6
GRB 090308B 2009/03/08 17:36:24.70 Fermi 01:30:00 58:05:00
GRB 090307B 2009/03/07 10:34:00 Fermi 14:36:00 04:00:58.60
GRB 090307A 2009/03/07 03:46:37 Swift 16:19:58.64 -28:37:59.9
GRB 090306B 2009/03/06 23:07:02 Swift 15:24:49 -06:57:29
GRB 090306A 2009/03/06 13:54:24 Swift 01:06:58.31 -50:00:07.4
GRB 090306C 2009/03/06 05:52:05.35 Fermi 09:00:00 51:36:00
GRB 090305 2009/03/05 05:19:51 Swift 16:07:02 -31:34:00
GRB 090305B 2009/03/05 01:14:35.72 Fermi 10:20:00 68:06:00
GRB 090304 2009/03/04 05:10:48.16 Fermi 16:25:00 -80:54:00
GRB 090301B 2009/03/01 07:33:37.98 Fermi 23:21:00 09:00:00
GRB 090301A 2009/03/01 06:55:55 Swift 22:32:34 26:38:32
GRB 090228 2009/02/28 04:53:20.91 Fermi 07:07:00 -24:18:00
GRB 090227B 2009/02/27 18:31:01.41 Fermi 11:48:36 32:10:12
GRB 090227 2009/02/27 07:25:57.00 Fermi 00:13:00 -43:06:00
GRB 080226 2009/02/26 14:52:42.17 Fermi 10:29:00 14:30:00
GRB 090222 2009/02/22 04:17:09.58 Fermi 08:01:00 43:24:00
GRB 090219 2009/02/19 01:46:18.15 Fermi 01:05:36 60:12:00
GRB 090217 2009/02/17 04:56:42.56 Fermi 14:08:00 -02:48:00
GRB 090213 2009/02/13 05:39:25.46 Fermi 21:48:00 -53:30:00
GRB 090207 2009/02/07 18:39:10.84 Fermi 16:19:00 36:49:00
GRB 090205 2009/02/05 23:03:14 Swift 14:43:38.69 -27:51:09.6
GRB 090202 2009/02/02 08:19:30.40 Fermi 17:56:00 -02:30:00
GRB 090201 2009/02/01 17:47:02 Swift 06:08:07 -46:35:10
GRB 090129 2009/01/29 21:07:15 Swift 17:56:25.1 -32:47:34.8
GRB 090126C 2009/01/26 05:52:33.73 Fermi 14:52:00 39:12:00
GRB 090126B 2009/01/26 05:26:22.23 Fermi 19:42:00 33:12:00
GRB 090126A 2009/01/26 02:01:15 SuperAGILE 00:15:23.5 81:21:53.78
GRB 090123A 2009/01/23 07:51:56 Swift 00:27:06 -23:30:50
GRB 090123 2009/01/23 07:51:56 Swift 00:27:08.74 -23:30:03.9
GRB 090118 2009/01/18 13:54:02 Swift 03:19:28 18:28:40
GRB 090117A 2009/01/17 15:21:54 SuperAgile 10:56:10.66 -58:14:00.8
GRB 090117C 2009/01/17 15:10:40.18 Fermi 07:50:00 -40:18:00
GRB 090117B 2009/01/17 08:02:02.23 Fermi 15:32:00 27:36:00
GRB 090113A 2009/01/13 18:40:39 Swift 02:08:17 33:27:23
GRB 090113 2009/01/13 18:40:39 Swift 02:08:16.63 33:25:42.9
GRB 090112B 2009/01/12 17:30:15.45 Fermi 12:15:00 2212:00
GRB 090112A 2009/01/12 07:57:23.11 Fermi 07:27:00 -30:17:00
GRB 090111A 2009/01/11 23:58:21 Swift 16:46:34 00:05:27
GRB 090111 2009/01/11 23:58:21 Swift 16:46:42.21 00:04:36.8
GRB 090109 2009/01/09 07:58:29.49 Fermi 08:11:00 54:48:00
GRB 090108B 2009/01/08 07:43:23.36 Fermi 00:15:00 -32:12:00
GRB 090108A 2009/01/08 00:29:02.37 Fermi 17:32:00 52:28:00
GRB 090107B 2009/01/07 16:20:40 INTEGRAL 18:59:22 59:36:25
GRB 090107B 2009/01/07 16:20:36 INTEGRAL 18:59:16.21 59:35:42.3
GRB 090107A 2009/01/07 04:48:04 Swift 20:09:42 04:43:38
GRB 090107A 2009/01/07 04:48:04 Swift 20:09:38.2 04:44:37.9
GRB 090102 2009/01/02 02:55:45 Swift 08:32:58.54 33:06:51.2
Originally posted by operation mindcrime
..so instead of showing a current sun activity picture, show one of march 10th 2009...in this you'll find your answer...
Magnetospheric behavior is strongly influenced by the solar wind, the supersonic stream of charged particles flowing out from the Sun. The most familiar manifestation of the magnetosphere's interaction with the solar wind is the aurora -- the Northern and Southern Lights. These colorful displays result from the impact of magnetospheric charged particles with the gases of the Earth's upper atmosphere. Especially spectacular auroras are associated with "space storms," magnetospheric disturbances in the solar wind. In addition to triggering intense auroral activity, geomagnetic storms can damage spacecraft, disrupt communications, and lead to power blackouts. It is thus important to understand such storms and be able to predict them.
Like all solar storms, the September storm distorted the shape of the magnetic field that surrounds the Earth. Without buffeting from the solar wind (charged particles like protons and electrons that are ejected from the Sun), the Earth’s magnetic field would look something like a plump doughnut, with the North and South poles forming the slender hole in the center. In reality, the nearly constant solar winds flatten the space side of the “doughnut” into a long tail. The amount of distortion changes when solar storms, such as the flare on September 7, send stronger winds towards the Earth. Changes to the magnetic field release fast-moving particles, which flow with charged particles from the Sun towards the center of the “doughnut” at the Earth’s poles. As the particles sink into the atmosphere, they collide with oxygen and nitrogen, lighting the sky with Nature’s version of neon lights, the aurora.