Keyword: sunspot

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  • Mesmerizing Video Shows Sunspot Larger Than Earth Rotating Toward the Planet

    07/15/2017 9:10:54 AM PDT · by BenLurkin · 25 replies
    Newsweak ^ | 7/14/17 at 12:31 PM | Stav Ziv
    It takes only 30 seconds to watch a new video released by NASA that shows the sun rotating to reveal a large sunspot. But the mesmerizing footage, captured by the agency’s Solar Dynamics Observatory, seems to go on much longer, drawing viewers in with the majestic view and sustained motion of the sun. Sunspots are particularly active areas on the sun’s surface that have “intense and complex magnetic fields,” according to NASA. “Like freckles on the face of the sun, they appear to be small features, but size is relative: The dark core of this sunspot is actually larger than...
  • Sunspot, and chance of weekend storms

    07/08/2017 10:31:01 PM PDT · by BenLurkin · 9 replies
    earthsky.org ^ | July 7, 2017 | Deborah Byrd
    We’re approaching another minimum in the 11-year sunspot cycle, predicted for the years 2019 and 2020, and so the number of visible spots on the sun has been low. But there’s a nice, big, visible spot on the sun now, plus an Earth-facing coronal hole seen by spacecraft. Because this hole in the sun’s atmosphere faces Earth – and because it releases a high-speed solar wind – experts say there’s a 60% chance this weekend of minor G1-class geomagnetic storms, which could causes auroras. The coming full moon, of course, might interfere or might give you an opportunity for some...
  • Photo: Giant sunspot sends its love to planet Earth

    04/14/2016 8:25:05 AM PDT · by BenLurkin · 17 replies
    The massive sunspot region now facing Earth, dubbed AR2529, has morphed into the shape of a heart. The lovely image was obtained by Karzaman Ahmad of the Langkawi National Observatory in Malaysia who shared it with the world at SpaceWeather.com. ... True to its form, the sunspot has proven to be a gentle giant so far, emitting few flares and only a couple weak coronal mass ejections. But such hearts can break, and what will follow is difficult to predict. It will spend about another week facing Earth.
  • Astronomy Picture of the Day -- The Sun in X-rays from NuSTAR

    12/29/2014 4:04:56 AM PST · by SunkenCiv · 13 replies
    NASA ^ | December 29, 2014 | (see photo credit)
    Explanation: Why are the regions above sunspots so hot? Sunspots themselves are a bit cooler than the surrounding solar surface because the magnetic fields that create them reduce convective heating. It is therefore unusual that regions overhead -- even much higher up in the Sun's corona -- can be hundreds of times hotter. To help find the cause, NASA directed the Earth-orbiting Nuclear Spectroscopic Telescope Array (NuSTAR) satellite to point its very sensitive X-ray telescope at the Sun. Featured above is the Sun in ultraviolet light, shown in a red hue as taken by the orbiting Solar Dynamics Observatory (SDO)....
  • How To Predict Dangerous Solar Flares

    12/16/2014 10:38:01 AM PST · by blam · 15 replies
    BI - Scientific American ^ | 12-16-2014 | Monica Bobra
    Monica Bobra, Scientific American December 16, 2014A couple of months ago, the sun sported the largest sunspot we've seen in the last 24 years. This monstrous spot, visible to the naked eye (that is, without magnification, but with protective eyewear of course), launched more than 100 flares. The number of the spots on the sun ebbs and flows cyclically, every 11 years. Right now, the sun is in the most active part of this cycle: we're expecting lots of spots and lots of flares in the coming months. Usually, the media focuses on the destructive power of solar flares —...
  • Astronomy Picture of the Day -- Solar Flare from a Sharper Sun

    11/23/2014 11:38:14 AM PST · by SunkenCiv · 6 replies
    NASA ^ | November 22, 2014 | (see photo credit)
    Explanation: Solar active region AR2192 was the largest recorded sunspot group of the last 24 years. Before rotating off the Earth-facing side of the Sun at the end of October, it produced a whopping six energetic X-class flares. Its most intense flare was captured on October 24 in this stunning view from the orbiting Solar Dynamics Observatory. The scene is a color combination of images made at three different wavelengths of extreme ultraviolet light; 193 angstroms shown in blue, 171 angstroms in white, and 304 angstroms in red. The emission, from highly ionized Iron and Helium atoms, traces magnetic field...
  • First solar storm from huge sunspot reaches Earth and knocks out satellites

    10/26/2014 8:09:43 AM PDT · by Enlightened1 · 18 replies
    The Daily Mail ^ | 10/22/14 | Mark Prigg and Jonathan O'Callaghan
    Solar radiation knocked out some radio communication on Earth yesterday It came from a giant sunspot seen on the surface of the sun recently Sunspot AR12192 is 14 times larger than Earth and almost as big as Jupiter The Met Office tells MailOnline it might be the largest sunspot in 25 years It is so big that it can be seen in images of the sun from Earth's surface This particular flare from the sunspot was brief but strong It follows three days of severe storms on the sun 'It would seem to be just a matter of time before...
  • Astronomy Picture of the Day -- Sunspots and Solar Eclipse

    10/26/2014 7:25:56 AM PDT · by SunkenCiv · 1 replies
    NASA ^ | October 25, 2014 | (see photo credit)
    Explanation: A New Moon joined giant sunspot group AR 2192 to dim the bright solar disk during Thursday's much anticipated partial solar eclipse. Visible from much of North America, the Moon's broad silhouette is captured in this extreme telephoto snapshot near eclipse maximum from Santa Cruz, California. About the size of Jupiter, the remarkable AR 2192 itself darkens a noticeable fraction of the Sun, near center and below the curved lunar limb. As the sunspot group slowly rotates across the Sun and out of view in the coming days its activity is difficult to forecast. But the timing of solar...
  • Astronomy Picture of the Day -- AR 2192: Giant on the Sun

    10/26/2014 7:22:29 AM PDT · by SunkenCiv · 2 replies
    NASA ^ | October 24, 2014 | (see photo credit)
    Explanation: As you (safely!) watched the progress of yesterday's partial solar eclipse, you probably also spotted a giant sunspot group. Captured in this sharp telescopic image from October 22nd the complex AR 2192 is beautiful to see, a sprawling solar active region comparable in size to the diameter of Jupiter. Like other smaller sunspot groups, AR 2192 is now crossing the Earth-facing side of the Sun and appears dark in visible light because it is cooler than the surrounding surface. Still, the energy stored in the region's twisted magnetic fields is enormous and has already generated powerful explosions, including two...
  • Astronomy Picture of the Day -- Sunspot Group AR 2192 Crackles

    10/26/2014 7:15:37 AM PDT · by SunkenCiv · 2 replies
    NASA ^ | October 22, 2014 | (see photo credit)
    Explanation: One of the largest sunspot groups in recent years is now crossing the Sun. Labelled Active Region 2192, it has already thrown a powerful solar flare and has the potential to produce more. The featured video shows a time lapse sequence of the Sun in visible and ultraviolet light taken yesterday and incorporating the previous 48 hours. AR 2192, rotating in from the left, rivals Jupiter in size and is literally crackling with magnetic energy. The active Sun has caused some spectacular auroras in recent days, and energetic particles originating from AR 2192 may help continue them over the...
  • LOTS OF SOLAR FLARES (Today)

    10/22/2014 7:23:25 AM PDT · by tired&retired · 11 replies
    Spaceweather.com ^ | 10/22/2014 | Spaceweather
    During the past 48 hours, monster sunspot AR2192 has unleashed seven M-class solar flares. The most powerful of the bunch (Oct 22nd at 0159 UT) was an M9-class eruption that almost crossed the threshold into X-territory. NASA's Solar Dynamics Observatory recorded the extreme ultraviolet flash. UV radiation from the flare ionized Earth's upper atmosphere, causing a brief blackout of HF radio communications on the dayside of Earth (e.g., parts of Asia and Australia). In addition, the explosion might have hurled a CME into space. Confirmation awaits the arrival of coronagraph data from the Solar and Heliospheric Observatory (SOHO). Stay tuned...
  • Awesome Photo Shows Monster Sunspot Aiming Our Way

    10/20/2014 1:23:32 PM PDT · by BenLurkin · 34 replies
    universetoday.com ^ | October 20, 2014 | Jason Major off
    According to Spaceweather.com AR2192 has grown considerably over the past few days and has the potential to unleash M- and X-class flares in our direction now that it’s moving into Earth-facing position. It’s currently many times larger than Earth and will likely get even bigger… in fact, during this week’s partial solar eclipse AR2192 should be visible with the naked (but not unprotected!) eye for viewers across much of North America.
  • Beastly Sunspot Amazes, Heightens Eclipse Excitement

    10/22/2014 1:31:44 PM PDT · by BenLurkin · 12 replies
    universetoday.com ^ | on October 22, 2014 | Bob King
    Properly shielded, it was very easy to see with the naked eye. Unlike some other naked eye sunspots, this one showed structure. The eastern end was darker, the western half grayer and more extended. Through a small telescope, the mix of dark umbras scattered amid weirdly sculpted penumbral “islands” was incredible to see. Photographs like the one above are wonderful documents, but witnessing this beautiful complex magnetic mess with your own eyes is another experience altogether. Region 2192 continues to grow and size and complexity and is now the largest sunspot group of solar cycle 24 which began in 2009...
  • Sun Goes Wild: NOAA Issues Alert: Earth Directed X-Class Flare Is On Its Way; Chance Of More

    01/08/2014 3:56:40 PM PST · by Kartographer · 52 replies
    SHTF Plan ^ | 1/8/14 | Mac Slavo
    Then at 12:32 Central Time it went wild: Massive sunspot AR1944 has erupted. The X1 flare has sent a coronal mass ejection into space, and it’s heading towards Earth. … NOAA has upped the risk from further X-class flares to 50% for the next 24 hours. Risk of M-class up to 80%
  • Scientists say destructive solar blasts narrowly missed Earth in 2012

    03/20/2014 10:46:14 AM PDT · by Red Badger · 27 replies
    www.reuters.com ^ | Thu Mar 20, 2014 10:14am EDT | By Laila Kearney
    Fierce solar blasts that could have badly damaged electrical grids and disabled satellites in space narrowly missed Earth in 2012, U.S. researchers said on Wednesday. The bursts would have wreaked havoc on the Earth's magnetic field, matching the severity of the 1859 Carrington event, the largest solar magnetic storm ever reported on the planet. That blast knocked out the telegraph system across the United States, according to University of California, Berkeley research physicist Janet Luhmann. "Had it hit Earth, it probably would have been like the big one in 1859, but the effect today, with our modern technologies, would have...
  • X-FLARE! AR1967 returned to the Earthside of the sun on Feb. 25th and promptly erupted

    02/26/2014 12:34:51 AM PST · by tired&retired · 8 replies
    SpaceWeather.Com ^ | 2/25/2014 | Space Weather
    X-FLARE! Long-lived sunspot AR1967 returned to the Earthside of the sun on Feb. 25th and promptly erupted, producing an X4.9-class solar flare. This is the strongest flare of the year so far and one of the strongest of the current solar cycle. A movie from NASA's Solar Dynamics Observatory shows the explosion hurling a loop of hot plasma away from the blast site: http://spaceweather.com/images2014/25feb14/redflare3_strip4.gif The source of the eruption is long-lived sunspot AR1967, now beginning its third trip across the Earthside of the sun. This region was an active producer of flares during its previous transits, and it looks like...
  • Astronomy Picture of the Day -- Sunspot Loops in Ultraviolet

    01/26/2014 9:00:23 AM PST · by SunkenCiv · 8 replies
    NASA ^ | January 26, 2014 | (see photo credit)
    Explanation: It was a quiet day on the Sun. The above image shows, however, that even during off days the Sun's surface is a busy place. Shown in ultraviolet light, the relatively cool dark regions have temperatures of thousands of degrees Celsius. Large sunspot group AR 9169 from the last solar cycle is visible as the bright area near the horizon. The bright glowing gas flowing around the sunspots has a temperature of over one million degrees Celsius. The reason for the high temperatures is unknown but thought to be related to the rapidly changing magnetic field loops that channel...
  • 28 solar flares in the last seven days, and more may be coming(about time)

    11/01/2013 9:30:13 PM PDT · by Texas Fossil · 16 replies
    Los Angeles Times ^ | October 31, 2013, 4:04 p.m. | Deborah Netburn
    The sun has erupted more than two dozen times over the last week, sending radiation and solar material hurtling through space - and scientists say more eruptions may be coming. This shouldn't be unusual. After all, we are technically at solar maximum, the peak of the 11-year cycle of the sun's activity. But this has been a noticeably mellow solar maximum, with the sun staying fairly quiet throughout the summer. So when our life-giving star suddenly let loose with 24 medium strength M-class solar flares and four significantly stronger X-class flares between Oct. 23 and Oct. 30, it felt like...
  • Huge Sunspot Facing the Earth: Watch It Live Today

    07/09/2013 11:14:27 AM PDT · by LibWhacker · 39 replies
    Space.com ^ | 7/9/13
    Editor's Note: Today's live webcast of the sun has been delayed one hour to 2 p.m. EDT (1800 GMT) due to cloud cover at the observing site. A huge sunspot 11 times the size of Earth is facing our planet now and you can see live telescope views of the solar behemoth in a skywatching webcast today. The giant sunspot AR1785 will star in a free webcast by the online skywatching website Slooh Space Camera Tuesday (July 9) at 2 p.m. EDT (1800 GMT) and last about 25 minutes. You can watch the sunspot webcast live on SPACE.com, courtesy...
  • Massive Sunspot Rapidly Forming

    02/21/2013 9:53:38 PM PST · by BenLurkin · 11 replies
    weather.com ^ | Published: Feb 20, 2013, 7:09 PM EST
    A giant sunspot that's at least six times the diameter of Earth has formed on the sun in less than 48 hours, according to NASA. According to a news release, scientists from NASA's Solar Dynamics Observatory watched the sunspot rapidly grow on February 19 and 20. The agency says it could even be larger than six times the diameter of Earth "since the spot lies on a sphere not a flat disk."