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Tag Archive: sun


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by Dr. Tony Phillips.

GLANCING-BLOW CME EXPECTED THIS WEEK:

A magnetic filament on the sun erupted during the late hours of Nov. 15th, hurling inky-black fragments of itself into space. Shortly thereafter, a CME was observed racing away from the sun:

Storm track models from NOAA suggest that the CME will deliver a glancing blow to Earth’s magnetic field on Nov. 18th or 19th. There is a 70% chance of polar geomagnetic storms when the CME arrives.

Actually, the arrival of the CME could be the second strike. A co-rotating interaction region (CIR) is also expected to hit Earth’s magnetic field on Nov. 18th. CIRs are transition zones between fast- and slow-moving solar wind streams. Solar wind plasma piles up in these regions, producing density gradients and shock waves that do a good job of sparking auroras.

The double impact, CIR followed by CME, could produce a G1 or G2-class geomagnetic storm and bright auroras around the Arctic Circle. Observers in northern-tier US states from Maine to Washington should be alert for colorful lights in the midnight sky

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Earth Watch Report  –  Solar Activity

 

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Space Weather

by Dr. Tony Phillips.

CORONAL CANYON:

Today, the sun’s atmosphere is split down the middle by a canyon-shaped coronal hole. NASA’s Solar Dynamics Observatory photographed the chasm, which is almost directly facing Earth:

Coronal holes are places where the sun’s magnetic field opens up and allows solar wind to escape. This hole is straddling the sun’s equator so the solar wind stream emerging from it will intersect Earth’s orbit. ETA: May 16-17. High-latitude sky watchers should be alert for auroras on those dates.

 

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Earth Watch Report  –  Solar Activity

 

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Space Weather

by Dr. Tony Phillips.

SOUTHERN CORONAL HOLE:

Imagine what it would be like if, from time to time, a hole opened up in Earth’s atmosphere and air went blowing out into space. On the sun, this happens all the time. The openings are called “coronal holes.” NASA’s Solar Dynamics Obervatory is monitoring one right now; it is the dark wedge-shaped region in this extreme ultraviolet image of the sun’s southern hemisphere:

Coronal holes are places in the sun’s atmosphere where the magnetic field bends back and allows gas to escape. From such openings, solar wind blows out into space. A stream of solar wind flowing from this particular coronal hole could reach Earth on May 11-12, sparking auroras when it arrives. On the other hand, the stream might sail south of our planet, delivering only a glancing blow. Stay tuned for updates.

 

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Huge square-shaped ‘coronal hole’ spotted on Sun (VIDEO)

Published time: May 13, 2014 12:00

NASA / SDO / GODDARD SPACE CENTER

NASA / SDO / GODDARD SPACE CENTER

A gigantic square hole has been video-captured on the Sun’s surface by NASA’s Solar Dynamics Observatory (SDO). The particularly large monstrosity, known as a “coronal hole”, is an indicator of solar winds ejected out of the star at insane speeds.

 

Read More and Watch Video Here

 

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 Space Weather. com

by Dr. Tony Phillips.

RADIO BLACKOUT:

An X-class solar flare on April 25th irradiated Earth’s upper atmosphere with extreme ultraviolet radiation. Waves of ionization rippled around the dayside of the planet, causing a widespread blackout of shortwave radio transmissions. Radio astronomer Dick Flagg recorded the event at his observatory at the Windward Community College on Oahu:

“This is a dynamic spectrum,” explains Flagg. “The vertical axis is frequency (MHz) and the horizontal axis is time (UTC).” All of the horizontal lines corresponding to terrestrial radio stations vanished in the aftermath of the flare.

The active region responsible for the flare rotated off the solar disk yesterday, so even if it flares again, another radio blackout is unlikely this weekend. NOAA forecasters estimate the odds of an X-flare on April 26th to be a scant 1%.

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Space .com

Sun Unleashes Major Solar Flare (Video)

An X1.3-class solar flare (far right) erupts from the surface of the sun on April 24, 2014 EDT  (April 25 GMT).

An X1.3-class solar flare (far right) erupts from the surface of the sun on April 24, 2014 EDT (April 25 GMT).
Credit: NASA/Solar Dynamics Observatory

X-class flares top the scale with the most energy and potential to disrupt communications on Earth.

X-class flares top the scale with the most energy and potential to disrupt communications on Earth. See how solar flares compare to each other in this Space.com inforgraphic.
Credit: Karl Tate, SPACE.com Contributor

 

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BPEarthWatch BPEarthWatch

 

Published on Feb 17, 2014

The sun releashes an earth facing filament. CME ALERT.
Solar and Quake links http://www.Bpearthwatch.com

 

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Space Weather

by Dr. Tony Phillips.

 

‘RADIOACTIVE’ ERUPTION:

On Feb. 17th at approximately 04:50 UT, a magnetic filament erupted from the sun’s western limb. NASA’s Solar Dynamics Observatory captured this high-resolution image of the blast:

Because of its location on the sun’s western limb, the eruption did not send a CME toward Earth. However, there was an effect on our planet: Shortwave radio loudspeakers roared with static, an event called a Type II radio burst.

Here’s how it works: The explosion sent shock waves rippling through the sun’s atmosphere. Those shock waves, in turn, triggered plasma instabilities in the solar corona that emit strong radio emissions. The static-y “roar” of the explosion was picked up by solar observatories and ham radio stations across the dayside of our planet. Based on the sweep of radio frequencies from 20 MHz to 500 MHz, analysts estimate a shock velocity of 776 km/s or 1.7 million mph. That may sound fast, but it is typical for this type of eruption. 

 

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Published time: January 16, 2014 20:50
image from www.eso.org

image from http://www.eso.org

Scientists discovered three new planets orbiting stars in a cluster about 2,500 light years from Earth. Remarkably, among them they found an exoplanet orbiting a star which is almost identical to our own Sun in all respects.

The fascinating find was made by astronomers from the Max Planck Institute for Extraterrestrial Physics in Germany. They have been monitoring 88 promising-looking stars in a formation called Messier 67 for the past six years. Messier 67 is a cluster of about 500 stars in the constellation of Cancer.

The discovery is so exciting because it is the first time astronomers have found an exoplanet orbiting a star which is almost identical to our sun, in a cluster of stars. The star, similar to the sun in mass, temperature and chemical composition, was named YBP1194.

The second planet that was discovered is also orbiting a star similar to the Sun. The third one is circling a more massive and evolved red giant star.

Read More Here

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BPEarthWatch BPEarthWatch

 

Published on Jan 4, 2014

Giant Sunspot 1944 is turning earth facing. Draconid meteor shower.
Solar,Quake and Weather Links, http://www.bpearthwatch.com

 

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 Spaceweather

by Dr. Tony Phillips.

GIANT SUNSPOT:

Sunspot AR1944, which appeared on January 1st, is one of the largest sunspots of the current solar cycle. It’s so big, people are noticing it as a naked-eye blemish on the solar disk. Daisuke Tomiyasu sends this picture from Higashinada-ku, Kobe, Hyogo, Japan:

“Sunspot 1944 was visible at sunrise on January 4th,” says Tomiyasu. “I combined three exposures of 1/15sec, 1/100sec, and 1/640sec to create this HDR (high dynamic range) image.”

Aside: Look carefully at the full-sized picture. There is a red fringe on the bottom of the sun and a green fringe on top. That’s real. The colorful fringes are caused by refraction in Earth’s atmosphere. The effect is explained here.

Although the sunspot has been relatively quiet and stable since it first appeared on New Year’s Day, a region of this size has the potential to produce significant activity. Indeed, NOAA forecasters, who say they are keeping a close eye on this behemoth, estimate a 75% chance of M-flares and a 30% chance of X-flares on Jan. 4th.  

 

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 Spaceweather

by Dr. Tony Phillips.

GREEN VORTEX OVER SWEDEN:

For the second day in a row, a solar wind stream is buffeting Earth’s magnetic field, sparking intermittant geomagnetic storms and auroras around the Arctic Circle. Last night, Northern Lights tour guide Chad Blakley photographed a luminous green vortex over Sweden’s Abisko National Park:

“Tonight was one of those nights that makes being an aurora photographer the best job in the world,” says Blakley. “The lights started around 5:00 PM and continued well into the night. I had the pleasure of spending the evening with Peter Richards, a representative of National Geographic student photography expeditions. At one point during our night under the stars I heard him say that the display was the most amazing thing he had ever seen in his life – I couldn’t agree more!”

NOAA forecasters estimate a 20% chance of more polar geomagnetic storms on Jan. 4th as the solar wind continues to blow. 

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BPEarthWatch BPEarthWatch·

 

Published on Jan 2, 2014

2 large objects caputured on Lasco C2 During a solar flare.
Solar,Quake and Weather Links….http://www.BPEarthWatch.com
http://www.blogtalkradio.com/bpearthw…

 

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Spaceweather

SOLAR ACTIVITY UPDATE:

by Dr. Tony Phillips.

2014 began with a bang. At 18:54 UT on January 1st, big sunspot AR1936 erupted, producing a strong M9-class solar flare. NASA’s Solar Dynamics Observatory captured the explosion’s extreme ultraviolet flash:

The movie shows a dark filament of plasma racing away from the blast site, but most of the material fell back to the stellar surface. Nevertheless, the explosion did produce a CME that could deliver a glancing blow to Earth’s magnetic field later this week. NOAA analysts are still evaluating this possibility.

The M9-flare of New Year’s Day followed close on the heels of an M6-flare on New Year’s Eve. Sunspot AR1936 produced both explosions. The New Year’s Eve event produced a minor, slow-moving CME that is not expected to disturb Earth’s magnetic field if and when it does arrive.

Sunspot AR1936 is active, but new sunspot AR1944 looks even more potent. The behemoth active region emerged over the sun’s southeastern limb on Jan 1st:

Because of foreshortening near the sun’s limb, the complexity of AR1944’s magnetic field is still unknown. The sheer size of the sunspot, however, suggests it is capable of strong flares. The emergence of AR1944 combined with the ongoing activity from AR1936 has prompted NOAA forecasters to raise the odds of eruptions on Jan. 2nd to 70% for M-flares and 30% for X-flares

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The Telegraph

Sun expected to ‘flip upside down’ as magnetic field reverses its polarity

According to NASA the sun is about to flip upside down and it could happen any day now

8:00AM GMT 15 Nov 2013

The sun’s magnetic field is about to flip upside down as it reverses its polarity.

In August Nasa said the reversal would happen in three to four months time, although that it would be impossible to pinpoint a more specific date.

Solar physicist Todd Hoeksema from Stanford University said that the reversal would have “ripple effects” across the whole of the solar system.

According to Nasa the sun’s magnetic field changes polarity approximately every 11 years.

In comparison the last time the Earth’s magnetic field flipped was almost 800,000 years ago.

When this happens the opposing magnetic poles switch places so the magnetic field is flipped.

The pole reversal happens at the peak of each solar cycle as the sun’s “inner magnetic dynamo” reorganises itself.

The exact internal mechanism that drives the magnetic shift is not yet entirely understood by researchers, although the sun’s magnetic field has been monitored on a daily basis by Scientists at Stanford’s Wilcox Solar Observatory.

Read More Here

Stanford scientist explains sun’s magnetic reversal

StanfordUniversity StanfordUniversity

Published on Nov 8, 2013

The sun’s magnetic field is poised to reverse its polarity. The effects of the event, which occurs every 11 years, will ripple throughout the solar system and be closely monitored by Stanford solar physicists.

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Sun Flips Poles! Sun’s Magnetic Field Reverses Polarity!

Published on Dec 30, 2013

The Cycle of flipping is complete. We are Now at the mid point of solar cycle 24. The pattern runs in 22 year cycles!

http://www.independent.co.uk/news/sci…

http://zeenews.india.com/news/space/s…

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Sun has ‘flipped upside down’ as new magnetic cycle begins

The sun’s magnetic field has fully reversed its polarity, marking the midpoint of Solar Cycle 24, which will be completed in 11 years time

The sun has “flipped upside down”, with its north and south poles reversed to reach the midpoint of Solar Cycle 24, Nasa has said.

Now, the magnetic fields will once again started moving in opposite directions to begin the completion of the 22 year long process which will culminate in the poles switching once again.

“A reversal of the sun’s magnetic field is, literally, a big event,” said Nasa’s Dr. Tony Phillips.

“The domain of the sun’s magnetic influence (also known as the ‘heliosphere’) extends billions of kilometers beyond Pluto. Changes to the field’s polarity ripple all the way out to the Voyager probes, on the doorstep of interstellar space.”

 

Read More and Watch Video Here

To mark the event, Nasa has released a visualisation of the entire process.

NASA | The Sun Reverses its Magnetic Poles

Published on Dec 5, 2013

This visualization shows the position of the sun’s magnetic fields from January 1997 to December 2013. The field lines swarm with activity: The magenta lines show where the sun’s overall field is negative and the green lines show where it is positive. A region with more electrons is negative, the region with less is labeled positive. Additional gray lines represent areas of local magnetic variation.

The entire sun’s magnetic polarity, flips approximately every 11 years — though sometimes it takes quite a bit longer — and defines what’s known as the solar cycle. The visualization shows how in 1997, the sun shows the positive polarity on the top, and the negative polarity on the bottom. Over the next 12 years, each set of lines is seen to creep toward the opposite pole eventually showing a complete flip. By the end of the movie, each set of lines are working their way back to show a positive polarity on the top to complete the full 22 year magnetic solar cycle.

At the height of each magnetic flip, the sun goes through periods of more solar activity, during which there are more sunspots, and more eruptive events such as solar flares and coronal mass ejections, or CMEs. The point in time with the most sunspots is called solar maximum.

Credit: NASA/GSFC/PFSS

This video is public domain and can be downloaded at: http://svs.gsfc.nasa.gov/goto?11429

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