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Posts Tagged ‘plasma’

Giant “Surfing” Waves Roll Through Sun’s Atmosphere

June 10, 2011 Comments off

universetoday

Surfer waves — initiated in the sun, as they are in the water, by a process called a Kelvin-Helmholtz instability — have been found in the sun’s atmosphere. Credit: NASA/SDO/Astrophysical Journal Letters

Surf’s up on the Sun! Our favorite gnarly spacecraft, the Solar Dynamics Observatory (SDO) has caught conclusive evidence of classic “surfer waves” in the Sun’s atmosphere. But these waves trump ‘Hawaii Five-O’ surfing big time. These solar waves are about the same size as the continental U.S, and spotting these waves will help our understanding of how energy moves through the solar atmosphere, known as the corona.

Just like a surfing wave on Earth, the solar counterpart is formed by Read more…

Impact of space weather threat examined

March 10, 2011 Comments off

theiet.org

Professor Hapgood examines the linkage between the science of space weather and its impact on technological systems, potential impact of Solar weather on orbital and ground based systems including power, energy and communications – as well as atmospheric physics.
Space weather is concerned with disturbances in Earth’s upper atmosphere and in near-Earth space that can disrupt the advanced technologies on which our society now relies. A proper understanding of space weather requires us to bring together a range of scientific, engineering and economic expertise, emphasizing the role of the electromagnetic force in many of the physical processes that cause space weather.
One example is the crucial role of plasma physics within the sources of space weather on the Sun, in the transmission of energy from the Sun to the Earth via the solar wind and Earth’s magnetosphere.
Another is the role of the electric currents that naturally flow with Read more…

Get ready for a ‘global Katrina’: Biggest ever solar storm could cause power cuts which last for MONTHS

February 22, 2011 Comments off

David Derbyshire

www.dailymail.co.ukImminent: The world got a taster of the sun's explosive power last week with the strongest solar eruption in five years sent a torrent of charged plasma hurtling towards the world. Scientists believe we are overdue a ferocious solar storm

  • Earth is overdue a solar storm as the sun enters its most active period.

The world is overdue a ferocious ‘space storm’ that could knock out communications satellites, ground aircraft and trigger blackouts – causing hundreds of billions of pounds of damage, scientists say.

Astronomers today warned that mankind is now more vulnerable to a major solar storm than at any time in history – and that the planet should prepare for a global Katrina-style disaster.

A massive eruption of the sun would save waves of radiation and charged particles to Earth, damaging the satellite systems used for synchronizing computers, airline navigation and phone networks.

Imminent: The world got a taster of the sun’s explosive power last week with the strongest solar eruption in Read more…

NASA: Huge Solar Flare Jamming Radio And Satellite Signals, Could Affect Electric Grid, Bright Auroras Expected

February 17, 2011 Comments off

According to NASA, a large solar eruption triggered a giant geomagnetic storm that has disturbed radio communications and could disrupt electrical power grids, radio and satellite communication in the next days

The calm before the storm. Three CMEs are enroute, all a part of the Radio Blackout events on February 13, 14, and 15 (UTC). The last of the three seems to be the fastest and may catch both of the forerunners about mid to late day tomorrow, February 17. Watch this space for updates on the impending — G2, possibly periods of G3 — geomagnetic storming.
Watch Today’s Space Weather for the most recent activity.

This is a composite image of the Sun at the moment of the X2.2 flare. Image courtesy of SDO

(NASA)

Credit: NASA/SDO

A strong wave of charged plasma particles emanating from the Jupiter-sized sun spot, the most powerful seen in four years, has already disrupted radio communication in southern China.

Solar Activity Forecast:  Read more…