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martes, 10 de julio de 2012

RV: Scientists trace solar storms

Fuente: ScienceGuide
Expuesto el: martes, 10 de julio de 2012 9:52
Autor: ScienceGuide
Asunto: Scientists trace solar storms

 

Solar storms can have a devastating impact on communication satellites and power grids. Now, a major step was taken to forecast them more precisely. For the first time, an international team of astrophysicists managed to observe Sun gases surging into coronal loops.


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domingo, 1 de abril de 2012

RV: Huge tornadoes discovered on the Sun

 

 

Fuente: The Royal Astronomical Society
Expuesto el: jueves, 29 de marzo de 2012 10:17
Autor: The Royal Astronomical Society
Asunto: Huge tornadoes discovered on the Sun

 

1220Solar tornadoes several times as wide as the Earth can be generated in the solar atmosphere, say researchers in the UK. A solar tornado was discovered using the Atmospheric Imaging Assembly telescope on board the Solar Dynamic Observatory (SDO) satellite. A movie of the tornado will be presented at the National Astronomy Meeting 2012 in Manchester on Thursday 29th March.

"This is perhaps the first time that such a huge solar tornado is filmed by an imager. Previously much smaller solar tornadoes were found my SOHO satellite. But they were not filmed," says Dr. Xing Li, of Aberystwyth University.

Dr. Huw Morgan, co-discover of the solar tornado, adds, "This unique and spectacular tornado must play a role in triggering global solar storms."

The Atmospheric Imaging Assembly saw superheated gases as hot as 50 000 – 2 000 000 Kelvin sucked from the root of a dense structure called prominence, and spiral up into the high atmosphere and travel about 200 000 kilometres along helical paths for a period of at least three hours. The tornadoes were observed on 25 September 2011.

The hot gases in the tornadoes have speeds as high as 300,000 km per hour. Gas speeds of terrestrial tornadoes can reach 150km per hour.

The tornadoes often occur at the root of huge coronal mass ejections. When heading toward the Earth, these coronal mass ejections can cause significant damage to the earth's space environment, satellites, even knock out the electricity grid.

The solar tornadoes drag winding magnetic field and electric currents into the high atmosphere. It is possible that the magnetic field and currents play a key role in driving the coronal mass ejections.

SDO was launched in February 2010. The satellite is orbiting the Earth in a circular, geosynchronous orbit at an altitude of 36,000 kilometres. It monitors constantly solar variations so scientists can understand the cause of the change and eventuallyhave a capability to predict the space weather.

IMAGES AND ANIMATIONS

Stills and animations of the solar tornado can be downloaded from:

http://users.aber.ac.uk/xxl/tornado.htm

The tornado was observed with the AIA telescope on board NASA's Solar Dynamic Observatory. Credit: NASA/SDO/AIA/Aberystwyth University/Li/Morgan/Leonard

 

SCIENCE CONTACTS

Dr Xing Li

University of Aberystwyth

Tel: 01970 621 542

Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

 

Dr Huw Morgan

University of Aberystwyth

Tel: 01970 622810

Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

 

MEDIA CONTACTS

NAM 2012 Press Office (0900 – 1730 GMT, 27-29 April; 0900 – 1630 GMT 30 April)

Room 3.214

University Place building

University of Manchester

Manchester, UK

Tel: +44 (0)161 306 7313

Dr Robert Massey

Royal Astronomical Society

Mob: +44 (0)794 124 8035

Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

Anita Heward

Royal Astronomical Society

Mob: +44 (0)7756 034 243

Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

Dr Klaus Jaeger
Pressereferent / Press Officer im Vorstand der Astronomischen Gesellschaft
Tel: +49 6221 528 379
Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

This e-mail address is being protected from spambots. You need JavaScript enabled to view it

Dan Cochlin
Media Officer (Faculty of Engineering and Physical Sciences)
University of Manchester
Tel: +44 (0)161 275 8387
Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

NOTES FOR EDITORS

NAM 2012

Bringing together more than 900 astronomers and space scientists, the National Astronomy Meeting (NAM 2012) will take place from 27-30 March 2012 in the University Place conference centre at the University of Manchester in the UK. The conference is a joint meeting of the Royal Astronomical Society (RAS) and the German Astronomische Gesellschaft (AG) and is held in conjunction with the UK Solar Physics (UKSP: www.uksolphys.org) and Magnetosphere Ionosphere Solar Terrestrial (MIST: www.mist.ac.uk) meetings. NAM 2012 is principally sponsored by the RAS, AG, STFC and the University of Manchester.

The Royal Astronomical Society

The Royal Astronomical Society (RAS: www.ras.org.uk), founded in 1820, encourages and promotes the study of astronomy, solar-system science, geophysics and closely related branches of science. The RAS organises scientific meetings, publishes international research and review journals, recognizes outstanding achievements by the award of medals and prizes, maintains an extensive library, supports education through grants and outreach activities and represents UK astronomy nationally and internationally. Its more than 3500 members (Fellows), a third based overseas, include scientific researchers in universities, observatories and laboratories as well as historians of astronomy and others.

The Astronomische Gesellschaft (AG)

The Astronomische Gesellschaft (AG: www.astronomische-gesellschaft.de), founded in 1863, is a modern astronomical society with more than 800 members dedicated to the advancement of astronomy and astrophysics and the networking between astronomers. It represents German astronomers, organises scientific meetings, publishes journals, offers grants, recognises outstanding work through awards and places a high priority on the support of talented young scientists, public outreach and astronomy education in schools.

The Science and Technology Facilities Council

The Science and Technology Facilities Council (STFC: www.stfc.ac.uk) is keeping the UK at the forefront of international science and tackling some of the most significant challenges facing society such as meeting our future energy needs, monitoring and understanding climate change, and global security. The Council has a broad science portfolio and works with the academic and industrial communities to share its expertise in materials science, space and ground-based astronomy technologies, laser science, microelectronics, wafer scale manufacturing, particle and nuclear physics, alternative energy production, radio communications and radar. It enables UK researchers to access leading international science facilities for example in the area of astronomy, the European Southern Observatory.

Jodrell Bank Centre for Astrophysics

The Jodrell Bank Centre for Astrophysics (JBCA: www.jb.man.ac.uk/) is part of the School of Physics & Astronomy at the University of Manchester. JBCA is split over two main sites: the Alan Turing Building in Manchester and the Jodrell Bank Observatory in Cheshire. At Jodrell Bank Observatory, the new Jodrell Bank Discovery Centre is a key focus for our work in public engagement and education. Jodrell Bank is a world leader in radio astronomy-related research and technology development with a research programme extending across much of modern astrophysics. The group operates the e-MERLIN national radio astronomy facility and the iconic Lovell Telescope, hosts the UK ALMA Regional Centre Node and is home to the international office of the SKA Organisation. Funded by the University, the Science & Technology Facilities Council and the European Commission, it is one of the UK's largest astrophysics research groups.

 


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RV: Solar ‘climate change’ could cause rougher space weather

 

 

Fuente: The Royal Astronomical Society
Expuesto el: viernes, 30 de marzo de 2012 16:32
Autor: The Royal Astronomical Society
Asunto: Solar 'climate change' could cause rougher space weather

 

M2 CMERecent research shows that the space age has coincided with a period of unusually high solar activity, called a grand maximum. Isotopes in ice sheets and tree rings tell us that this grand solar maximum is one of 24 during the last 9300 years and suggest the high levels of solar magnetic field seen over the space age will reduce in future. This decline will cause a reduction in sunspot numbers and explosive solar events, but those events that do take place could be more damaging. Graduate student Luke Barnard of the University of Reading will present new results on 'solar climate change' in his paper at the National Astronomy Meeting in Manchester.

 

The level of radiation in the space environment is of great interest to scientists and engineers as it poses various threats to man-made systems including damage to electronics on satellites. It can also be a health hazard to astronauts and to a lesser extent the crew of high-altitude aircraft.

 

The main sources of radiation are galactic cosmic rays (GCRs), which are a continuous flow of highly energetic particles from outside our solar system and solar energetic particles (SEPs), which are accelerated to high energies in short bursts by explosive events on the sun. The amount of radiation in the near-Earth environment from these two sources is partly controlled in a complicated way by the strength of the Sun's magnetic field.

 

There are theoretical predictions supported by observational evidence that a decline in the average strength of the Sun's magnetic field would lead to an increase in the amount of GCRs reaching near-Earth space. Furthermore there are predictions that, although a decline in solar activity would mean less frequent bursts of SEPs, the bursts that do occur would be larger and more harmful.

 

Currently spacecraft and aircraft are only designed and operated to offer suitable protection from the levels of radiation that have been observed over the course of the space age. A decline in solar activity would result in increased amounts of radiation in near-Earth space and therefore increased risk of harm to spacecraft and aircraft and the astronauts and aircraft crews that operate them.

 

By comparing this grand maximum with 24 previous examples, Mr Barnard predicts that there is an 8% chance that solar activity will fall to the very low levels seen in the so-called 'Maunder minimum', a period during the seventeenth century when very few sunspots were seen. In this instance, the flux of GCRs would probably increase by a factor of 2.5 from present day values and the probability of observing a large SEP event will fall from the presently seen 5 down to 2 events per century.

 

However, the more probable scenario is that solar activity will decline to approximately half its current value in the next 40 years, in which case the flux of GCRs will increase by a factor of 1.5 and the probability of large SEP events to increase from the current value to 8 events per century. As a result the near-Earth space radiation environment will probably become more hazardous in the next 40 years.

 

In presenting his results, Mr Barnard comments: "Radiation in space can be a serious issue for both people and the delicate electronic systems that society depends on. Our research shows that this problem is likely to get worse over the coming decades – and that engineers will need to work even harder to mitigate its impact."

 

IMAGE, VIDEOS AND CAPTION

 

Images and videos of a Coronal Mass Ejection (CME) can be downloaded from http://sdo.gsfc.nasa.gov/gallery/main.php?v=item&;id=80

 

A high-resolution version of the same image is available at http://sdo.gsfc.nasa.gov/gallery/gallery/assets/print/M2_CME.tif

 

Caption: Image of a coronal mass ejection (CME) on June 7, 2011, recorded in ultraviolet light by the Solar Dynamics Observatory (SDO) satellite. The shock front that forms ahead of these huge expulsions of material from the solar atmosphere (the event shown moved at 1400 km/s) can generate large fluxes of highly energetic particles at Earth which can be a considerable hazard to space-based electronic systems and with repeated exposure, a health risk for crew on board high-altitude aircraft. Credit: NASA / SDO

 

MEDIA CONTACTS

 

NAM 2012 Press Office (0900 – 1730 GMT, 27-29 April; 0900 – 1630 GMT 30 April)

Room 3.214

University Place building

University of Manchester

Manchester

UK

Tel: +44 (0)161 306 7313

                                                            

Dr Robert Massey

Royal Astronomical Society

Mob: +44 (0)794 124 8035

Email:  This e-mail address is being protected from spambots. You need JavaScript enabled to view it

 

Anita Heward

Royal Astronomical Society

Mob: +44 (0)7756 034 243

Email:  This e-mail address is being protected from spambots. You need JavaScript enabled to view it

 

Dr Klaus Jaeger
Pressereferent / Press Officer im Vorstand der Astronomischen Gesellschaft
Tel: +49 6221 528 379
Email:  This e-mail address is being protected from spambots. You need JavaScript enabled to view it

 

Dan Cochlin
Media Officer (Faculty of Engineering and Physical Sciences)
University of Manchester
Tel: +44 (0)161 275 8387
Email:  This e-mail address is being protected from spambots. You need JavaScript enabled to view it


SCIENCE CONTACT

 

Luke Barnard

Department of Meteorology

University of Reading

Tel: +44 (0)118 378 8950

Mob: +44(0) 759 062 2956

Email:  This e-mail address is being protected from spambots. You need JavaScript enabled to view it

 

NOTES FOR EDITORS

 

NAM 2012

 

Bringing together more than 900 astronomers and space scientists, the National Astronomy Meeting (NAM 2012) will take place from 27-30 March 2012 in the University Place conference centre at the University of Manchester in the UK. The conference is a joint meeting of the Royal Astronomical Society (RAS) and the German Astronomische Gesellschaft (AG) and is held in conjunction with the UK Solar Physics (UKSP: www.uksolphys.org) and Magnetosphere Ionosphere Solar Terrestrial (MIST: www.mist.ac.uk) meetings. NAM 2012 is principally sponsored by the RAS, AG, STFC and the University of Manchester.

 

The Royal Astronomical Society

 

The Royal Astronomical Society (RAS: www.ras.org.uk), founded in 1820, encourages and promotes the study of astronomy, solar-system science, geophysics and closely related branches of science. The RAS organises scientific meetings, publishes international research and review journals, recognizes outstanding achievements by the award of medals and prizes, maintains an extensive library, supports education through grants and outreach activities and represents UK astronomy nationally and internationally. Its more than 3500 members (Fellows), a third based overseas, include scientific researchers in universities, observatories and laboratories as well as historians of astronomy and others.

 

The Astronomische Gesellschaft (AG)

 

The Astronomische Gesellschaft (AG: www.astronomische-gesellschaft.de), founded in 1863, is a modern astronomical society with more than 800 members dedicated to the advancement of astronomy and astrophysics and the networking between astronomers. It represents German astronomers, organises scientific meetings, publishes journals, offers grants, recognises outstanding work through awards and places a high priority on the support of talented young scientists, public outreach and astronomy education in schools.

 

The Science and Technology Facilities Council

 

The Science and Technology Facilities Council (STFC: www.stfc.ac.uk) is keeping the UK at the forefront of international science and tackling some of the most significant challenges facing society such as meeting our future energy needs, monitoring and understanding climate change, and global security. The Council has a broad science portfolio and works with the academic and industrial communities to share its expertise in materials science, space and ground-based astronomy technologies, laser science, microelectronics, wafer scale manufacturing, particle and nuclear physics, alternative energy production, radio communications and radar. It enables UK researchers to access leading international science facilities for example in the area of astronomy, the European Southern Observatory.

 

Jodrell Bank Centre for Astrophysics

 

The Jodrell Bank Centre for Astrophysics (JBCA: www.jb.man.ac.uk/) is part of the School of Physics & Astronomy at the University of Manchester. JBCA is split over two main sites: the Alan Turing Building in Manchester and the Jodrell Bank Observatory in Cheshire. At Jodrell Bank Observatory, the new Jodrell Bank Discovery Centre is a key focus for our work in public engagement and education. Jodrell Bank is a world leader in radio astronomy-related research and technology development with a research programme extending across much of modern astrophysics. The group operates the e-MERLIN national radio astronomy facility and the iconic Lovell Telescope, hosts the UK ALMA Regional Centre Node and is home to the international office of the SKA Organisation. Funded by the University, the Science & Technology Facilities Council and the European Commission, it is one of the UK's largest astrophysics research groups.


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jueves, 8 de marzo de 2012

Fwd: Biggest solar storm in years hits, so far so good



---------- Forwarded message ----------
From: Justiniano Estrada <kraneuspeladen0@gmail.com>
Date: 2012/3/8
Subject: Fwd: Biggest solar storm in years hits, so far so good
To: kraneuspeladen0_publicar <kraneuspeladen0.cuervo_purulento@blogger.com>




---------- Forwarded message ----------
From: FriendFeed - kraneuspeladen <donotreply@rssforward.com>
Date: 2012/3/8
Subject: Biggest solar storm in years hits, so far so good
To: kraneuspeladen0@gmail.com


WASHINGTON (AP) — One of the strongest solar storms in years engulfed Earth early Thursday, but scientists say the planet may have lucked out.

Hours after the storm arrived, officials said were no reports of problems with power grids, satellites or other technologies that are often disrupted by solar storms.

But that still can change as the storm shakes the planet's magnetic field in ways that could disrupt technology but also spread colorful Northern Lights. Early indications show that it is about 10 times stronger than the normal solar wind that hits Earth.

The storm started with a massive solar flare Tuesday evening and grew as it raced outward from the sun, expanding like a giant soap bubble, scientists said. The charged particles were expected to hit at 4 million mph (6.4 million kph).

The storm struck about 6 a.m. EST (1100 GMT) in a direction that causes the least amount of problems, said Joe Kunches, a scientist at the National Oceanic and Atmospheric Administration's Space Weather Prediction Center.

"It's not a terribly strong event. It's a very interesting event," he said.

Forecasters can predict the speed a solar storm travels and its strength, but the north-south orientation is the wild card. And this time, Earth got dealt a good card with a northern orientation, which is "pretty benign," Kunches said. If it had been southern, that would have caused the most damaging technological disruption and biggest auroras.

"We're not out of the woods," Kunches said Thursday morning. "It was a good start. If I'm a power grid, I'm really happy so far."

But that storm orientation can and is changing, he said.

"It could flip-flop and we could end up with the strength of the storm still to come," Kunches said from the NOAA forecast center.

North American utilities so far have not reported any problems, said Kimberly Mielcarek, spokeswoman for the North American Electric Reliability Corporation, a consortium of electricity grid operators

A massive cloud of charged particles can disrupt utility grids, airline flights, satellite networks and glovbal positioning services, especially in northern areas. But the same blast can also paint colorful auroras farther from the poles than normal.

Astronomers say the sun has been relatively quiet for some time. And this storm, while strong, may seem fiercer because Earth has been lulled by several years of weak solar activity.

The storm is part of the sun's normal 11-year cycle, which is supposed to reach a peak next year. Solar storms do not harm people, but they do disrupt technology. And during the last peak around 2002, experts learned that GPS was vulnerable to solar outbursts.

Because new technology has flourished since then, scientists could discover that some new systems are also at risk, said Jeffrey Hughes, director of the Center for Integrated Space Weather Modeling at Boston University.

The region of the sun that erupted can still send more blasts our way, Kunches said. Another set of active sunspots is ready to aim at Earth.

"This is a big sun spot group, particularly nasty," NASA solar physicist David Hathaway said. "Things are really twisted up and mixed up. It keeps flaring."

Storms like this start with sun spots, Hathaway said.

Then comes an initial solar flare of subatomic particles that resemble a filament coming out of the sun. That part from this storm hit Earth only minutes after the initial burst, bringing radio and radiation disturbances.

After that comes the coronal mass ejection, which looks like a growing bubble and takes a couple days to reach Earth.

___

Online:

NOAA Space Weather Prediction Center: www.swpc.noaa.gov

NASA on solar flare: http://www.nasa.gov/mission_pages/sunearth/news/News030712-X1.5.html

___

Follow Seth Borenstein at http://twitter.com/borenbears

FriendFeed 09 Mar, 2012


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Source: http://news.yahoo.com/biggest-solar-storm-years-hits-far-good-162342753.html
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martes, 17 de agosto de 2010

RV: ALERT: Electron 2 MeV Integral Flux exceeded 1,000 pfu

 

 

De: SWPC Product Subscription Service [mailto:SWPC.Products@noaa.gov]
Enviado el: lunes, 16 de agosto de 2010 17:36
Para: kraneuspeladen@gmail.com
Asunto: ALERT: Electron 2 MeV Integral Flux exceeded 1,000 pfu

 

Space Weather Message Code: ALTEF3
Serial Number: 1721
Issue Time: 2010 Aug 16 1531 UTC
 
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1720
Begin Time: 2010 Aug 06 0920 UTC
Yesterday Maximum 2MeV Flux: 1720 pfu
 
 
 
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/NOAAscales

 


Thank you for using the Product Subscription Service. If you would like to remove a product subscription or update the personal information in your account, go to the Product Subscription Site. Please do not use the from address for correspondence, as it is not monitored. For comments or help, please contact SWPC Help.

domingo, 15 de agosto de 2010

RV: ALERT: Electron 2 MeV Integral Flux exceeded 1,000 pfu

 

 

De: SWPC Product Subscription Service [mailto:SWPC.Products@noaa.gov]
Enviado el: domingo, 15 de agosto de 2010 14:17
Para: kraneuspeladen@gmail.com
Asunto: ALERT: Electron 2 MeV Integral Flux exceeded 1,000 pfu

 

Space Weather Message Code: ALTEF3
Serial Number: 1720
Issue Time: 2010 Aug 15 1212 UTC
 
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1719
Begin Time: 2010 Aug 06 0920 UTC
Yesterday Maximum 2MeV Flux: 2036 pfu
 
 
 
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/NOAAscales

 


Thank you for using the Product Subscription Service. If you would like to remove a product subscription or update the personal information in your account, go to the Product Subscription Site. Please do not use the from address for correspondence, as it is not monitored. For comments or help, please contact SWPC Help.

sábado, 14 de agosto de 2010

RV: ALERT: Electron 2 MeV Integral Flux exceeded 1,000 pfu

 

 

De: SWPC Product Subscription Service [mailto:SWPC.Products@noaa.gov]
Enviado el: sábado, 14 de agosto de 2010 12:02
Para: kraneuspeladen@gmail.com
Asunto: ALERT: Electron 2 MeV Integral Flux exceeded 1,000 pfu

 

Space Weather Message Code: ALTEF3
Serial Number: 1719
Issue Time: 2010 Aug 14 0956 UTC
 
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1718
Begin Time: 2010 Aug 06 0920 UTC
Yesterday Maximum 2MeV Flux: 1562 pfu
 
 
 
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/NOAAscales

 


Thank you for using the Product Subscription Service. If you would like to remove a product subscription or update the personal information in your account, go to the Product Subscription Site. Please do not use the from address for correspondence, as it is not monitored. For comments or help, please contact SWPC Help.

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