Articles tagged "solar wind"

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Origins of solar wind revealed

The origins of the constant flow of charged particles from the Sun, known as the solar wind, and the details of the transition from defined rays in the Sun's upper atmosphere to the solar wind have been a mystery ever since the discovery of solar wind in 1950s....

September 03, 2016

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CME impact from X1.6 solar flare generated strong G3 geomagnetic storm and bright auroras

The Earth's magnetic field got disturbed in response to the arrival of the September 10 halo CME caused by X1.6 solar flare. Magnetometers around the world recorded a Geomagnetic Sudden Impulse at 15:55 UTC which signaled the arrival of the CME at

September 12, 2014

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Solar wind stream buffers Earth magnetic field

Earth is currently inside a solar wind stream flowing in from the massive coronal hole on the Sun's northern hemisphere. Elevated solar wind speed (above 600 km/s) combined with a south tilting Bz component of Interplanetary magnetic field (IMF) is responsible

June 23, 2013

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Geomagnetic storm still in progress (June 2, 2013)

The arrival of an interplanetary shock wave on May 31, 2013 caused geomagnetic storming that reached G2 (Moderate) geomagnetic storm levels on NOAA/SWPC storm scale during June 1, 2013. The solar wind speed remains elevated above 650 km/s. Currently, geomagnetic

June 02, 2013

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Intro to space weather vocabulary - video

Heliophysics scientists study energy transformation from one event to the other and which electromagnetic waves create which conditions near Earth. Space weather effects can disrupt satellites in space, so scientists need to understand the system in even more detail.

May 06, 2013

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New research to focus on energy distribution in upper atmosphere

"Understanding interaction between the Earth’s magnetic field, or magnetosphere, and its upper atmosphere – known as the thermosphere/ionosphere – is especially important this year and in 2014, said Yue Deng, an assistant physics professor at University of Texas.

March 12, 2013

Artistic Solar Wind

Researchers discovered source of solar wind energy

Researchers have found signs of an energy source in the solar wind, a hot and fast flow of magnetized gas that streams away from the sun's upper atmosphere. Solar wind is made of hydrogen and helium ions with a sprinkling of heavier elements. Solar wind is

March 10, 2013

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Zooming in on charged particles emitted by the Sun

Using ESA’s Cluster satellites as a space plasma microscope, scientists have zoomed in on the solar wind to reveal the finest detail yet, finding tiny turbulent swirls that could play a big role in heating it.Turbulence is highly complex and all around us, evident

December 19, 2012

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Earth-directed partial halo CME should reach our magnetic field late on October 8

A long duration B7.5 solar flare was observed at 07:30 UTC on October 5. Post eruption loop structures were observed in GOES SXI imagery in the vicinity of Region 1584. A partial halo CME was first observed in SOHO/LASCO C3 imagery at 07:30 UTC and STEREO Ahead

October 06, 2012

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M1.3 and C9.9 solar flares occurred while Earth expects impact of September 28 CME

Sunspot 1583 on the western limb produced an M1.3 flare on Sept. 30 at 04:33 UTC. Region 1583 had grown rapidly in the past 24 hours, however it is only hours away from rotating off the solar disk and out of view. SIDC and NOAA/SWPC expect mostly eruptive conditions

October 01, 2012

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Geomagnetic activity at normal levels while another CME impact expected

NOAA/SWPC reported that the G1 (minor) Geomagnetic Storm has ended with the return of normal solar wind conditions. Currently solar winds blow at speed of 419.1 km/sec. Earthbound proton levels are now below the S1 Minor Radiation Storm threshold and geomagnetic

September 04, 2012

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CME shock from solar filament on August 31 hit Earth, geomagnetic storming in progress

Solar filament eruption on August 31 generated at least two potentially Earth directed CME clouds. Earth was hit by first CME shock, observed in the solar wind around 11:20 UTC. The impact induced significant ground currents in northern Scandinavia and

September 04, 2012

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CME will likely pass above Earth's north side on Jan 22, auroras expected

NOAA/SWPC have determined that the CME from Active Region 1402 near disk center from the latest M3 solar flare will likely pass above (north) of Earth. This glancing blow will cause just G1 (Minor) Geomagnetic Storm activity. We can expect first signs  starting from

January 21, 2012

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Solar wind stream blowing from big coronal hole, new sunspot regions forming

The dark vertical coronal hole, about 120,000 km wide and more than a million km long, stretches in the center of the Sun. A solar wind stream flowing from the indicated coronal hole should reach Earth on Jan. 16-17, possibly sparking auroras at

January 14, 2012

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A minor solar wind stream is buffeting Earth's magnetic field

A minor solar wind stream is buffeting Earth's magnetic field. Arctic sky watchers should be alert for auroras.Solar windspeed: 469.1 km/secdensity: 2.3 protons/cm3The Radio Sun10.7 cm flux: 135 sfuPlanetary K-indexNow: Kp= 1 quiet24-hr max: Kp=

December 12, 2011

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Minor solar wind stream could spark auroras tonight

 Earth is entering a minor solar wind stream that could spark auroras around the Arctic Circle. High-latitude sky watchers should be alert for Northern Lights tonight.Solar windspeed: 452.2 km/secdensity: 1.5 protons/cm3The Radio Sun10.7 cm

December 11, 2011

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Beautifull auroras and the interplanetary magnetic field

Officially, the odds of a geomagnetic storm on Nov. 24th were small but dedicated aurora watchers still had some opportunity to take some nice images of beautifull sky game. Auroras have been flickering around the Arctic Circle for several days. These displays are not

November 24, 2011

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Big sunspot starting to release X-class solar flares

NOAA forecasters have upgraded the chance of X-class solar flares today to 20%. The source would be AR1339, one of the biggest sunspots in many years. The active region rotated over the sun's eastern limb two days ago and now it is turning toward Earth.The Radio

November 04, 2011

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Minor geomagnetic storm subsiding

The solar wind was at increased levels Tuesday morning and combined with a south tilting Bz, it stirred up a minor geomagnetic storm at high latitudes. Things have since returned to quieter levels.Solar activity increased to moderate levels Monday with three M-Class

November 01, 2011

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Another level M-Class flare

Another low level M-Class flare, this time raching M1.3 took place at 13:00 UTC Friday morning. The source of this flare was Sunspot 1319 which is approaching the western limb.Space Weather Prediction Center has just released a new page and tool to help predict

October 21, 2011

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Minor geomagnetic storming underway

Minor geomagnetic storming (G1 on the Geomagnetic Storm Scale) is underway following the arrival at Earth of 1 or more Coronal Mass Ejections that erupted from the Sun late last week and into the weekend.  Activity is not expected to strengthen much beyond current

October 06, 2011

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Solar wind blasts Mercury

At a NASA teleconference yesterday, researchers working with data from the Messenger spacecraft offered new evidence that gusts of solar wind are penetrating Mercury's magnetic field and eroding material off the planet's surface. The spacecraft has actually flown

September 30, 2011

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Aurora reverberations

A CME hit Earth's magnetic field on Sept. 26th, sparking one of the strongest magnetic storms in years. At the peak of the Kp=8 disturbance, auroras were sighted around both poles and more than half a dozen US states. Magnetic reverberations continued for more than 48

September 29, 2011

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Severe geomagnetic storm subsiding

A severe geomagnetic storm (Kp=7 to 8) that began yesterday when a CME hit Earth's magnetic field is subsiding.At the peak of the disturbance, auroras were sighted around both poles and in more than six US states including Michigan, New York, South Dakota, Maine, Ma

September 27, 2011

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Strong solar activity causing severe geomagnetic storm

High-latitude sky watchers should be alert for auroras. A strong (Kp=7) geomagnetic storm is in progress. Earth's magnetic field has been strongly disturbed since approximately 1300 UT on Sept. 26th when a CME hit our planet. The impact strongly compressed the

September 26, 2011

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Earth-directed coronal mass ejection expected

A coronal mass ejection (CME) is heading toward Earth and it could deliver a glancing blow to our planet's magnetic field on Sept. 22th around 23:00 UT. There are no large coronal holes on the Earth-facing side of the sun. High-latitude sky watchers should be alert for

September 21, 2011

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STEREO-SOHO detected six coronal mass ejections

On Sept. 19th, the STEREO-SOHO fleet of spacecraft surrounding the sun detected six coronal mass ejections (CMEs). Two of the clouds rapidly dissipated. The remaining four, however, are still intact and billowing through the inner solar system. Click to view a movie of

September 20, 2011

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Incoming coronal mass ejection

As predicted by analysts at the Goddard Space Weather Lab, a coronal mass ejection (CME) hit Earth's magnetic field at ~03:30 UT on Sept 17th. The impact was not strong. Nevertheless, the arrival of the CME could spark geomagnetic activity around the Arctic Circle.

September 17, 2011

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Incoming CME and new sunspots

Yesterday, Sept. 14th, an eruption near sunspot 1289 hurled a CME in the general direction of Earth. Analysts at the Goddard Space Weather Lab expect the cloud to deliver a glancing blow to our planet's magnetic field on Sept 17th around 04:30 UT. There are no large

September 15, 2011

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Geomagnetic storm continues

New sunspot AR1295 is emerging over the sun's northeastern limb and crackling with solar flares. The strongest so far, a C9.9-category blast, did something remarkable. Click on the arrow to watch an extreme ultraviolet movie from NASA's Solar Dynamics

September 13, 2011

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Geomagnetic storm subsiding, expecting more CMEs

The first of several CMEs en route to Earth struck our planet's magnetic field on Sept. 9th around 1130UT. The impact sparked a strong (Kp=7) geomagnetic storm, which is now subsiding. Last night Northern Lights were spotted in the United States as far south

September 10, 2011

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Geomagnetic storm in progress

UPDATE: The Geomagnetic Storm has subsided over the past few hours. However, the solar wind remains energized and occasional pulses of activity are expected for another 24 hours. Region 1283, the responsible party back at the Sun, decayed today. The Geomagnetic Storm

September 10, 2011

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Coronal hole in the sun's atmosphere is spewing solar wind toward Earth

 A yawning dark hole in the sun's atmosphere is spewing solar wind toward Earth. NASA's Solar Dynamics Observatory photographed the opening during the early hours of Aug. 26th: Solar wind flowing from this coronal hole is expected to arrive on Aug. 28-29,

August 26, 2011

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Sunspots 1271 and 1272 are growing again

After a weekend of quiet decay, sunspots 1271 and 1272 are growing again. Click on the image to view 24 hours of development:The increase in size has not yet translated into a significant increase in flares. Solar activity remains low, although this could change if

August 22, 2011

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Double coronal hole spewing high speed stream toward Earth

A double-barreled hole has opened up in the sun's atmosphere and it is spewing a split-stream of solar wind toward Earth. NASA's Solar Dynamics Observatory captured this composite UV image of the double coronal hole on August 20th:Sky watchers should be alert for

August 21, 2011

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New sunspots forming, Venus-directed CME

Yesterday, the Solar and Heliospheric Observatory witnessed a spectacular explosion on the sun that seemed to pass perilously close to Venus.As the movie shows, the CME passed harmlessly. There was no collision, and it wasn't even close. Although Venus seems to be

August 17, 2011

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New sunspot is emerging over the Sun's northeastern limb

A big new sunspot is emerging over the sun's northeastern limb. AR1271 has at least four dark cores and it is crackling with small flares. The sunspot's entrance was captured in this 24-hour movie from the Solar Dynamics Observatory: NOAA forecasters...

August 16, 2011

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Largest flare of Solar Cycle 24 occurred today - Non-Earth directed X6.9

This morning at 08:05 UTC, sunspot 1263 produced an X6.9 solar flare, the third X-flare of new Solar Cycle 24 and the most powerful so far. NASA's Solar Dynamics Observatory captured the explosion's extreme ultraviolet flash:The brunt of the ex

August 09, 2011

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Another M-class solar flare

A second M-Class flare, this time a M2.5 took place at 03:54 UTC Tuesday morning around Sunspot 1263. This is in addition to the earlier M3.5 flare which we reported yesterday. The first flare produced a small, but fast moving (2010 km/s) Coronal Mass Ejection...

August 09, 2011

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Behemoth sunspot 1263 has almost doubled in size

Behemoth sunspot 1263 has almost doubled in size this weekend. A 28-hour movie from NASA's Solar Dynamics Observatory shows the spot developing a tail that has added some 50,000 km of length to the active region.This development may increase the likelihood of a stro

August 08, 2011