Keyword: spaceweather

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    01/31/2017 4:02:36 AM PST · by tired&retired · 30 replies ^ | Jan. 31, 2017
    A large, canyon-shaped hole has opened in the sun's atmosphere, and it is spewing a stream of solar wind directly toward Earth. NASA's Solar Dynamics Observatory photographed the structure, which stretches more than halfway across the face of the sun:(see pic below) This is a "coronal hole" (CH)--a region where the sun's magnetic field opens up and allows solar wind to escape. NASA's STEREO spacecraft recently sampled the stream flowing from this hole and the velocity was unusually high: nearly 750 km/s. Such a fast-moving stream will likely spark Arctic auroras when it arrives on Feb. 1st.
  • SPRITES AND TROLLS AT THE EDGE OF SPACE PHOTOS (lightning-related phenomenon)

    08/20/2015 6:27:15 PM PDT · by ETL · 16 replies ^ | Aug 20, 2015
    SPRITES AND TROLLS AT THE EDGE OF SPACE: We all know what comes out of the bottom of thunderclouds: lightning. But rarely do we see what comes out of the top. On August 10th, astronauts onboard the International Space Station were perfectly positioned to observe red sprites dancing atop a cluster of storms in Mexico. They snapped this incredible photo: This shows just how high sprites can go. The photo shows their red forms reaching all the way from the thunderstorm below to a layer of green airglow some 100 km above Earth's surface. This means sprites touch the edge...

    10/22/2014 7:23:25 AM PDT · by tired&retired · 11 replies ^ | 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...
  • Space Weather on Par With Tornado Threat, NASA Chief Says

    06/11/2013 2:18:08 PM PDT · by EveningStar · 9 replies ^ | June 5, 2013 | Denise Chow
    Severe space weather could be as devastating to the planet as serious tornadoes and other natural disasters, NASA chief Charles Bolden said in a public address Tuesday (June 4). Bolden spoke before scientists and industry members at the Space Weather Enterprise Forum, which was held at the National Oceanic and Atmospheric Administration Auditorium and Science Center in Silver Spring, Md.
  • NOAA issues space weather G3 warning: "Strong to extreme"

    09/30/2012 10:59:48 PM PDT · by PghBaldy · 35 replies
    VOA/ NASA ^ | October 1 | VOA/NASA
    Space Weather Message Code: ALTK06 Serial Number: 294 Issue Time: 2012 Oct 01 0443 UTC ALERT: Geomagnetic K-index of 6 Threshold Reached: 2012 Oct 01 0439 UTC Synoptic Period: 0300-0600 UTC Active Warning: Yes NOAA Scale: G2 - Moderate Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as...
  • Space weather expert has ominous forecast

    05/05/2012 7:09:10 PM PDT · by null and void · 89 replies
    LA Times ^ | May 4, 2012, 7:26 p.m. | Amina Khan
    A massive explosion on the sun's surface has triggered the largest solar radiation storm since 2005, hurling charged particles at Earth. (NASA / May 4, 2012) A stream of highly charged particles from the sun is headed straight toward Earth, threatening to plunge cities around the world into darkness and bring the global economy screeching to a halt. This isn't the premise of the latest doomsday thriller. Massive solar storms have happened before — and another one is likely to occur soon, according to Mike Hapgood, a space weather scientist at the Rutherford Appleton Laboratory near Oxford, England. Much of...
  • Defence Committee - Tenth Report Developing Threats: Electro-Magnetic Pulses (EMP)

    02/26/2012 11:44:50 AM PST · by bigbob · 7 replies
    UK Parliment House of Commons ^ | 2-8-12 | House of Commons Defence Committee
    The threat 1. Today's society places an ever-growing reliance on technology. Modern infrastructures such as power, telecommunications and water systems, businesses, industries and services are now interdependent to a very significant degree, and disruption can therefore spread very quickly as the effects cascade through connected systems. A failure of the national grid for example, would inevitably have repercussions for a wide range of businesses and services, from energy supplies, water processing, traffic control and logistical systems and even parts of the finance sector. Similarly a growing reliance is placed on satellite-based technology such as GPS (global positioning system); for instance...
  • Space Weather Forecasters Get Serious

    10/21/2011 1:30:58 AM PDT · by neverdem · 5 replies
    ScienceNOW ^ | 20 October 2011 | Richard A. Kerr
    Enlarge Image Watch out! A new forecast model simulates the approach of a coronal mass ejection (boomerang of color) to Earth (green dot) that would trigger a solar storm. Credit: Space Weather Prediction Center/NOAA It took a while, but space physicists who predict immense balls of solar debris smashing into Earth have finally caught up with their brethren who forecast terrestrial weather. Rather than simply relying on rules of thumb, space weather forecasters have begun running a computer model that actually simulates the development of conditions between the sun and Earth. They're following the lead of atmospheric weather forecasters,...

    01/14/2011 11:20:16 AM PST · by The Comedian · 25 replies ^ | Friday, Jan. 14, 2011 |
    For the second day in a row, an active region on the far side of the sun is exploding and hurling CMEs into space. Click on the image to view a movie of the latest: Today's eruption was almost as dramatic as yesterday's, and suggests that more eruptions are in the offing. These explosions are occuring almost directly beneath NASA's STEREO-B spacecraft. An onboard telescope has recorded bright flashes of extreme UV radiation and shadowy shock waves emanating from the blast site (Jan. 13th movie). The telescope has also pinpointed the source: It is located just over the sun's eastern...

    12/16/2009 11:45:57 PM PST · by ApplegateRanch · 38 replies · 1,967+ views ^ | 12-17-2009 | Dr. Tony Phillips.
    EVENTS IN NEBRASKA: "At 9 p.m. Central Time on Dec. 16th, a very bright meteor lit up the completely overcast sky like lightning in southeast Nebraska," reports Trooper Jerry Chab of the Nebraska State Patrol. "It flashed for approximately 2 seconds and was followed by ground shaking, which prompted many calls by the public to law enforcement in a three county wide area." The USGS says there was a magnitude 3.5 earthquake near Auburn, Nebraska, at 8:53 pm Wednesday night, about the same time and place as the fireball. Coincidence? Readers in Nebraska with photos or eyewitness accounts are encouraged...

    08/21/2009 11:52:24 PM PDT · by ApplegateRanch · 32 replies · 1,982+ views ^ | Aug 22, 2009 | Dr. Tony Phillips.
    Sunspots are made of magnetism. The "firmament" of a sunspot is not matter but rather a strong magnetic field that appears dark because it blocks the upflow of heat from the sun's fiery depths. Without magnetism, there would be no sunspots [snip] According to Bill Livingston and Matt Penn of the National Solar Observatory in Tucson, Arizona, sunspot magnetic fields are waning. The two respected solar astronomers have been measuring solar magnetism since 1992. ... Extrapolating their data into the future suggests that sunspots could completely disappear within decades. [snip] "Whether this is an omen of long-term sunspot decline, analogous...
  • Lightning Splash (Zot on the Water - Amazing Pics)

    06/01/2009 9:16:36 AM PDT · by Squidpup · 32 replies · 5,008+ views
    Spaceweather ^ | June 1, 2009 | Francis Schaefers and Daniel Burger
    LIGHTNING SPLASH: On May 26th, photographers Francis Schaefers and Daniel Burger were chasing a thunderstorm along a beach in Vlissingen, the Netherlands, when "the storm turned around and came a little too close for comfort," says Schaefers. "We were able to photograph lightning hitting the water just 40 meters away." Here is the view through their Canon 400D: Look closely where the lightning meets the water. Tiny bolts appear to be dancing around the impact site. "Those are called 'upward streamers,'" says lightning expert Richard Blakeslee of the NASA Marshall Space Flight Center. "In a typical cloud-to-ground lightning strike, as...

    01/06/2009 9:22:38 AM PST · by TaraP · 42 replies · 1,351+ views
    Spaceweather ^ | Jan 6th, 2009
    SEVERE SPACE WEATHER: The National Academy of Sciences has just released the results of a study entitled Severe Space Weather Events--Understanding Societal and Economic Impacts. The 132-page document examines what might happen to our high-tech modern society in the event of a super solar flare followed by an extreme geomagnetic storm. Such a storm did occur in the year 1859. It electrified telegraph lines, shocking technicians and setting telegraph papers on fire; Northern Lights as far south as Cuba were so bright, you could read a newspaper by their eerie glow." According to the report, "a contemporary repetition of that...

    05/15/2008 3:27:42 PM PDT · by steveo · 7 replies · 92+ views ^ | 05/15/08 |
    In spite of solar minimum, there seems to be plenty of action on the sun," reports amateur astronomer Peter Schlatter of Wohlen, Switzerland, who yesterday witnessed a spectacular vortex swirling on the sun's eastern horizon. Indeed, the limb of the sun is where the action is. "A huge prominence emerged today looking like a monster rising from a sea of fire," reports David Leong of Hong Kong. None of this activity is explosive or threatens to cause geomagnetic storms on Earth--it's just a pretty show.
  • Asteroid 2007 BB close fly-by (Moon)

    01/18/2007 12:17:02 AM PST · by Orlando · 35 replies · 1,572+ views
    NASA/JPL ^ | 1-18-07 | JPL
    Asteroid 2007 BB to pass between 0.0026 au or 0.0025 au. The distance to the moon is 0.00256 au(238,855 miles). Earth is okay from any impact. Just for your information.

    11/10/2003 9:22:03 AM PST · by klpt · 11 replies · 196+ views
    Spaceweather ^ | 10 November, 2003 | Spaceweather
    The three giant sunspots that caused so much space weather in recent weeks are now on the farside of the sun. There are hints that the three are still active. Witness these CMEs hurled over the sun's limb by farside explosions: Nov. 6th (pictured right), Nov. 7th, and Nov. 9th. Using a technique called helioseismic holography, researchers can "see" a portion of the sun's farside. In a few days their images should tell us if two of the sunspots (486 and 488) are indeed still big. The sun's 27-day rotation is carrying these spots back toward the Earth-facing side of...
  • Heavy weather on high

    10/29/2003 10:12:13 PM PST · by JohnHuang2 · 3 replies · 269+ views
    Washington Times ^ | Thursday, October 30, 2003 | House Editorial
    <p>A gigantic blast of scorching gas from the sun crashed into the Earth's magnetic field yesterday. While static touched a few television programs, larger disruptions were averted, thanks to the advanced forecast of the flare supplied by the Space Environment Center (SEC).</p>

    02/17/2003 5:46:11 PM PST · by Lokibob · 19 replies · 364+ views ^ | 17 Feb 2003 |
     HOT COMET: Comet NEAT (C/2002 V1), which is perilously close to the Sun, has entered the field of view of SOHO coronagraphs. The comet has grown spectacularly bright in recent days and its tail is many times bigger than the Sun itself. (continued below)Above: A SOHO coronagraph image of Comet NEAT and the Sun on Feb. 17, 2003. The horizontal line near the head of the comet is a digital imaging artifact caused by saturation of camera pixels. [more]On Feb. 18th, the date of closest approach or "perihelion," Comet NEAT will lie just 0.1 AU from the Sun--well inside the...
  • Scientists Seek Clues in Solar Storm That Enveloped Shuttle

    02/17/2003 1:06:49 AM PST · by PeaceBeWithYou · 11 replies · 232+ views
    The New York Times ^ | 02-13-03 | JAMES GLANZ
    A storm of particles and radiation from the Sun, a kind of disturbance that has disabled or destroyed satellites on dozens of occasions, crossed the path of the space shuttle Columbia just as it was making its descent to Earth, scientists said yesterday. The disturbance was detected by at least two NASA space probes as it passed from deep space toward Earth on Feb. 1, said Dr. Devrie S. Intriligator, director of the space plasma laboratory at the Carmel Research Center, a private laboratory in Santa Monica, Calif., who discovered the event by examining data from the probes. Experts...
  • Astronomy Picture of the Day

    08/16/2002 9:17:07 PM PDT · by sleavelessinseattle · 37 replies · 516+ views
    NASA ^ | 8/17/02 | K. Zwintz, H. Tirado and A. Gomez
    Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2002 August 17 Asteroid 2002 NY40 Credit: K. Zwintz (Univ. Viena), H. Tirado and A. Gomez (CTIO, NOAO) Explanation: Asteroid 2002 NY40 will fly by planet Earth early in the morning August 18 Universal Time (late in the evening August 17 Eastern Daylight Time). Approaching to within about 530,000 kilometers or 1.3 times the Earth-Moon distance 2002 NY40 will definitely not be close enough to pose any danger...