Tag Archives: CME

New CME

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INCOMING CME? A coronal mass ejection (CME) that flew off the sun’s western limb on May 17th might hit Earth after all. NOAA forecasters say a shock wave from the blast could deliver a glancing blow to Earth’s magnetic field on May 18th or 19th. The CME, pictured below, was propelled by an M5-class solar flare from departing sunspot AR1476.

The speckles in the movie are caused by energetic protons hitting the observatory’s detector. Those protons may have been accelerated in part by the shock wave en route to Earth.

According to NOAA, there is a 40% chance of minor geomagnetic storms and a 15% chance of strong storms when the shock arrives. High-latitude sky watchers should be alert for auroras.

fr/spaceweather.com

May 14 CME

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INCOMING CME (UPDATED): On May 11th at 23:54 UT, a coronal mass ejection raced away from the sun faster than 1000 km/s. The fast-moving cloud will deliver a glancing blow to Earth’s magnetic field on May 14th around 14:30 UT, according to a revised forecast track prepared by analysts at the Goddard Space Weather Lab. Mars is also in the line of fire

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Awe-Inspiring Eruption on the Sun

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SPECTACULAR EXPLOSION (UPDATED): Magnetic fields on the sun’s northeastern limb erupted around 17:45 UT on April 16th, producing one of the most visually-spectacular explosions in years. NASA’s Solar Dynamics Observatory recorded the blast at extreme ultraviolet wavelengths:

The explosion, which registered M1.7 on the Richter Scale of solar flares, was not Earth-directed, but it did hurl a CME into space. Analysts at the Goddard Space Weather have analyzed the trajectory of the cloud and found that it will hit NASA’s STEREO-B spacecraft, the Spitzer space telescope, and the rover Curiosity en route to Mars. Planets Venus and Mars could also receive a glancing blow.

This event confirms suspicions that an active region of significance is rotating onto the Earth-facing side of the sun.

UPDATE: Using data from SDO, Steele Hill of NASA’s Goddard Space Flight Center has assembled a must-see movie of the event. The movie shows the explosion unfolding at 304 Angstroms, a wavelength which traces plasma with a temperature around 80,000 K.

from:    spaceweather.com

New Solar Eruption

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ANOTHER ERUPTION: For the past few days, magnetic filaments have been rising and snapping all around the sun. The latest eruption occured during the late hours of April 7th, shown here in an extreme UV video from NASA’s Solar Dynamics Observatory:

A CME hurled into space by this eruption might deliver a glancing blow to Earth’s magnetic field on or about April 9th. Like a CME observed two days ago, this one was visually confused by two other clouds leaving the sun from other blast sites at about the same time: movie.

fr/spaceweather.com

New CME

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INCOMING CME: NOAA forecasters estimate a 25% chance of strong geomagnetic storms around the poles on April 8-9 when a CME delivers a glancing blow to Earth’s magnetic field. The cloud was propelled in our direction by a solar filament, which erupted on April 5th (movie). High-latitude sky watchers should be alert for auroras.

from: spacewweather.com

Latest on Old Sunsport AR1429

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WHO’S AFRAID OF AN OLD SUNSPOT? Sunspot AR1429, the source of many strong flares and geomagnetic storms earlier this month, has returned, but it’s no longer the behemoth it once was. After a two week transit around the backside of the sun, AR1429 has substantially decayed. All that’s left is a few small dark cores scattered among some bright magnetic froth:

Even the corpse of AR1429 might still be potent, however. Just yesterday it produced a flurry of five C-class flares and sent waves of ionization rippling through the high atmosphere over Europe. Furthermore, NOAA forecasters estimate a 35% chance of M-class flares during the next 24 hours.

Some activity from this diminished active region is certainly possible, but it is unlikely to be anything like the strong storms of early March. Stay tuned for updates

from:   spaceweather.com

Sunspot AR 1429 Continues to Erupt

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INCREDIBLE SUNSPOT AR1429: Big sunspot AR1429, the source of so many strong flares and geomagnetic storms earler this month, is still erupting. The active region produced a significant coronal mass ejection on March 24th at 00:39 UT. Because of the sunspot’s location on the far side of the sun, this particular CME will not hit Earth. An animated forecast track prepared by analysts at the Goddard Space Weather Lab shows the trajectory of the expanding cloud:

The leading edge of the CME is espected to arrive at the STEREO-B spacecraft on March 25th at 13:08 UT (+/- 7 hours). None of the inner panets will be affected.

Since March began, sunspot AR1429 has propelled CMEs into every corner of the solar system, stirring up stormy space weather around every planet and spacecraft. If the sunspot remains active for another week or so, it will turn back toward Earth for a new round of geoeffective eruptions.

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CME on Farside of Sun

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FARSIDE CME: A spectacular CME rocketed away from the sun’s northwestern limb during the early hours of March 18th: movie. The probable source was old sunspot AR1429, still active as it transits the far side of the sun. Earth will not be affected by the cloud.

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Incoming CME 3/15

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STRONG FLARE, INCOMING CME: Departing sunspot AR1429 unleashed another strong flare on March 13th, an M7-class eruption that peaked around 1741 UT. Although the sunspot is no longer directly facing Earth, the blast will affect our planet. Analysts at the Goddard Space Weather Lab say a CME is en route to Earth, and its impact on March 15th at 06:20 UT (+/- 7 hours) could trigger minor to moderate geomagnetic storms

fr/spaceweather.com