m9-class solar flare

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From Spaceweather:

http://spaceweather.com/

GEOMAGNETIC STORM IN PROGRESS: A major geomagnetic storm is in progress following the impact of a CME on August 5th around 1800 UT. Sky watchers at all latitudes should be alert for auroras after nightfall. Tip: the best hours for aurora sightings are usually around local midnight. Aurora alerts: text, voice. 
Reports of Northern Lights are coming in from many European countries including Germany, Denmark, Scotland and the Netherlands.
Analysts at the Goddard Space Weather Lab say that the CME impact may have strongly compressed Earth's magnetic field, directly exposing satellites in geosynchronous orbit to solar wind plasma. Stay tuned for updates on this aspect of the storm.
The arriving CME left the sun on August 4th, propelled by an M9.3-category eruption in the magnetic canopy of sunspot 1261. Click on the image to view a movie of the expanding cloud recorded by the Solar and Heliospheric Observatory:

Note: The many speckles in this movie are caused by energetic solar protons hitting the camera.
July 2011 Aurora Gallery
[previous Julys: 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003]
NIGHT-TIME SOLAR RADIO BURST: The M9-class solar flare of August 4th produced a burst of shortwave static so powerful that receivers on Earth picked it up after sunset. "A RadioJove observer in Florida recorded the burst when the sun was 38 degrees below the horizon," reports amateur radio astronomer Thomas Ashcraft. Ashcraft's own radio telescope in New Mexico recorded the event 1 hour and 54 minutes after sunset:

"To my knowledge, receptions like this are very rare," says Ashcraft. 
Indeed they are. This event brings to mind the iconic night-time solar radio burst of March 8, 1958. Five radio telescopes at the University of Florida picked up emissions from the sun while observing the planet Jupiter in tthe middle of the night. On the other side of the world, radio astronomers in daylit Australia confirmed that a powerful solar radio burst had taken place at that exact time. The event is described in a 1959 Nature paper by pioneering radio astronomers Alex Smith and Tom Carr. They considered the possibility that solar radio waves might have been reflected by the Moon or carried to the night side of Earth by ionospheric ducting. In tthe end, they could not conclusively explain what happened and to this day night-time solar radio bursts remain a puzzle.
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Apparently these flares can be quite dangerous to human health.  To my understanding, it can be particularly dangerous to the brains of infants.  Supposedly it messes with the electrical processes of the brain.  Interesting stuff.

Edited by Lightningbolt - 05 August 2011 at 9:35pm

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Lightningbolt Members Profile Send Private Message Find Members Posts Add to Buddy List Platinum Member PHAT and PLAT Joined: 10 July 2002 Location: bumping up Status: Offline Points: 5055	Post Options Post Reply Quote Lightningbolt Report Post Thanks(0) Quote Reply Topic: m9-class solar flare Posted: 05 August 2011 at 9:33pm
	From Spaceweather: http://spaceweather.com/ GEOMAGNETIC STORM IN PROGRESS: A major geomagnetic storm is in progress following the impact of a CME on August 5th around 1800 UT. Sky watchers at all latitudes should be alert for auroras after nightfall. Tip: the best hours for aurora sightings are usually around local midnight. Aurora alerts: text, voice. Reports of Northern Lights are coming in from many European countries including Germany, Denmark, Scotland and the Netherlands. Analysts at the Goddard Space Weather Lab say that the CME impact may have strongly compressed Earth's magnetic field, directly exposing satellites in geosynchronous orbit to solar wind plasma. Stay tuned for updates on this aspect of the storm. The arriving CME left the sun on August 4th, propelled by an M9.3-category eruption in the magnetic canopy of sunspot 1261. Click on the image to view a movie of the expanding cloud recorded by the Solar and Heliospheric Observatory: Note: The many speckles in this movie are caused by energetic solar protons hitting the camera. July 2011 Aurora Gallery [previous Julys: 2010, 2009, 2008 , 2007, 2006, 2005 , 2004, 2003] NIGHT-TIME SOLAR RADIO BURST: The M9-class solar flare of August 4th produced a burst of shortwave static so powerful that receivers on Earth picked it up after sunset. "A RadioJove observer in Florida recorded the burst when the sun was 38 degrees below the horizon," reports amateur radio astronomer Thomas Ashcraft. Ashcraft's own radio telescope in New Mexico recorded the event 1 hour and 54 minutes after sunset: "To my knowledge, receptions like this are very rare," says Ashcraft. Indeed they are. This event brings to mind the iconic night-time solar radio burst of March 8, 1958. Five radio telescopes at the University of Florida picked up emissions from the sun while observing the planet Jupiter in tthe middle of the night. On the other side of the world, radio astronomers in daylit Australia confirmed that a powerful solar radio burst had taken place at that exact time. The event is described in a 1959 Nature paper by pioneering radio astronomers Alex Smith and Tom Carr. They considered the possibility that solar radio waves might have been reflected by the Moon or carried to the night side of Earth by ionospheric ducting. In tthe end, they could not conclusively explain what happened and to this day night-time solar radio bursts remain a puzzle. ----------------- Apparently these flares can be quite dangerous to human health. To my understanding, it can be particularly dangerous to the brains of infants. Supposedly it messes with the electrical processes of the brain. Interesting stuff. Edited by Lightningbolt - 05 August 2011 at 9:35pm