Coronal Mass Ejection Headed for Earth

[NASA]

On August 1st around 0855 UT, Earth orbiting satellites detected a C3-class solar flare. The origin of the blast was Earth-facing sunspot 1092. C-class solar flares are small (when compared to X and M-class flares) and usually have few noticeable consequences here on Earth besides aurorae. This one has spawned a coronal mass ejection heading in Earth's direction.





More... (http://www.nasa.gov/topics/solarsystem/sunearthsystem/main/News080210-cme.html)

[giovonni]

Solar Tsunami to Strike Earth http://image3.examiner.com/images/blog/replicate/EXID57244/images/resized_solar_prominence_with_earth1.jpg

The Solar Dynamics Observatory of NASA spotted a solar eruption or “coronal mass ejection” with a high definition view of the sun on Sunday. The eruption of the Sun’s surface has rocketed plasma into space that is on the path to meet our planet in the overnight and early morning hours of August 3 -4.


Earth is bracing for a cosmic tsunami Tuesday night as tons of plasma from a massive solar flare head directly toward the planet.

The Sun's surface erupted early Sunday morning, shooting a wall of ionized atoms directly at Earth, scientists say. It is expected to create a geomagnetic storm and a spectacular light show -- and it could pose a threat to satellites in orbit, as well.

"This eruption is directed right at us and is expected to get here early in the day on Aug. 4," said Leon Golub of the Harvard-Smithsonian Center for Astrophysics
. "It's the first major Earth-directed eruption in quite some time."

The solar eruption, called a coronal mass ejection, was spotted by NASA's Solar Dynamics Observatory, which captures high-definition views of the sun at a variety of wavelengths. SDO was launched in February and peers deep into the layers of the sun, investigating the mysteries of its inner workings.

"We got a beautiful view of this eruption," Golub said. "And there might be more beautiful views to come if it triggers aurorae."

Views of aurorae are usually associated with Canada and Alaska, but even skywatchers in the northern U.S. mainland are being told they can look toward the north Tuesday and Wednesday evenings for rippling "curtains" of green and red light.

When a coronal mass ejection reaches Earth, solar particles stream down our planet's magnetic field lines toward the poles. In the process, the particles collide with atoms of nitrogen and oxygen in the Earth's atmosphere, which then glow, creating an effect similar to miniature neon signs.

The interaction of the solar particles with our planet's magnetic field has the potential to create geomagnetic storms, or disturbances, in Earth's magnetosphere. And while aurorae are normally visible only at high latitudes, they can light up the sky even at lower latitudes during a geomagnetic storm.

Fortunately for Earth-bound observers, the atmosphere filters out nearly all of the radiation from the solar blast. The flare shouldn't pose a health hazard, Golub told FoxNews.com.

"It's because of our atmosphere," he explained, "which absorbs the radiation, as well as the magnetic field of the Earth, which deflects any magnetic particles produced."

The radiation "almost never" makes it to ground, he noted, though pilots and passengers in airplanes may experience increased radiation levels akin to getting an X-ray.

The solar particles also could affect satellites, though scientists think that possibility is remote. Orbital Sciences Corp. believe a similar blast may have knocked its Galaxy 15 satellite permanently out of action this year.

This type of solar event has both government officials and satellite
manufacturers worrying.

NASA scientists warned recently that high-energy electric pulses from the sun could cripple our electrical grid for years, causing billions in damages. In fact, the House is so concerned that the Energy and Commerce committee voted unanimously to approve a bill allocating $100 million to protect the energy grid from this rare but potentially devastating occurrence.

The sun's activity usually ebbs and flows on a fairly predictable cycle. Typically, a cycle lasts about 11 years, taking roughly 5.5 years to move from a solar minimum, a period of time when there are few sunspots, to peak at the solar maximum, during which sunspot activity is amplified.

The last solar maximum occurred in 2001. The latest minimum was particularly weak and long- lasting.

The most recent solar eruption is one of the first signs that the sun is waking up -- and heading toward another maximum.

Space.com contributed to this report.

view slide show~ at the link below~
http://www.foxnews.com/slideshow/scitech/2010/04/22/stunning-images-sun-nasas-solar-dynamics-observatory/#slide=1

here is a recent youtube video on this phenomena~

http://www.youtube.com/watch?v=iZgthD5u9IY&feature=player_embedded

[Praxis]

I found this article http://news.discovery.com/space/impact-coronal-mass-ejection-hits-earth.html

I think it is interesting that there was a mass ejection and nothing happened as a result. All the people who said that the power would go out.

[Swami]

http://www.spaceweather.com/aurora/images2010/04aug10/Shawn-Malone1.jpg?PHPSESSID=0cn07nu3qcbrb12h4lpvlncr10


NORTHERN LIGHTS: A coronal mass ejection (CME) hit Earth's magnetic field on August 3rd at 1740 UT. The impact sparked a G2-class geomagnetic storm that lasted nearly 12 hours--time enough for auroras to spread all the way from Europe to North America. Shawn Malone of Marquette, Michigan, photographed this display over Lake Superior:

http://www.spaceweather.com/

Northern Lights Gallery (http://www.spaceweather.com/aurora/gallery_01aug10.htm?PHPSESSID=0cn07nu3qcbrb12h4lpvlncr10)