Articles tagged "sunspot"


Earth-facing side of the sun without visible sunspots

Images taken by Solar Dynamics Observatory (SDO) on July 17, 2014 show no active sunspots on the visible solar disk. To be correct, tiny decaying AR 2113 is still visible, but its size remains so small that the plots and charts didn't registered it. SDO's

July 17, 2014


Traveling sunspot group AR 1785 (July 3 - 11, 2013)

NASA's Solar Dynamics Observatory (SDO) released video of Active Region 1785 - one of the largest sunspot groups this year, traveling across the Earth facing solar disk in period from July 3 - July 11, 2013. AR 1785 is now out of Earth view, moving onto

July 13, 2013


New emerging sunspots raise chances of flares in the coming days

Solar activity is currently at very low levels. However, a group of new sunspots are emerging over the southeastern limb and the chance of flares is increasing with it. This new group is increasing the solar EUV flux absorbed in the Earth’s

June 16, 2013


Old Sunspot 1731 erupted with M1.7 solar flare - May 20, 2013

A moderate solar flare peaking at M1.7 was observed off the east limb around >Returning Sunspot 1731 located off the east limb produced moderate M1.7 solar flare at 05:25 UTC on May 20, 2013. Sunspot 1731 will begin to rotate back into view within the next 24

May 20, 2013


G1 (Minor) Geomagnetic Storm in progress - May 18, 2013

G1 (Minor) Geomagnetic Storm conditions are now occurring due to the arrival of the CME from May 15, 2013. During G1 Geomagnetic Storm, weak power grid fluctuations can occur, minor impact on satellite operations is possible, aurora is commonly

May 18, 2013


Sunspot 1654 still dominates the visible solar disk

Active Region 1654 has traveled half across the Earth facing side of the Sun and now is squarely facing Earth. On January 13, this huge sunspot reached its maximum size measured as more than 193 000 km (120, 000 miles) wide long or 15 Earth diameters) from end to

January 16, 2013

sun January 13

Moderate to high solar activity with possible geomagnetic disturbances

Solar activity has been at moderate to high levels for the past 24 hours. AR1652 produced two M-class and 8 C-class solar flares  in the past 24 hours, and it has rapidly evolved to a compact beta-gamma-delta configuration. This active region erupted M1.0 flare

January 14, 2013


Moderate solar flare reaching M1.7 erupted from AR 1652

A second moderate solar flare erupted on January 13, 2013 from AR 1652. M1.7 solar flare peaked at 08:38 UTC. The event started at 08:35, peaked at 08:38 and ended at 08:40 UTC. Type II and IV radio emissions were associated with the event. Type II emissions occur

January 13, 2013

latest M class

Active Region 1652 produced M1.0 solar flare

Beta-gamma-delta Active Region 1652 generated M1.0 solar flare at 00:50 UTC on January 13, 2013. Considering the position of Sunspot 1652, which is facing Earth, geoeffective CME is possible. Active Region 1652 (Credit: SDO/The Watchers)  There are

January 13, 2013


Large AR 1654 rotating into direct Earth view, C8 solar flare generated

Sunspot 1654 produced a long duration C8.0 solar flare at 17:46 UTC on January 10, 2013. Besides C8 event, solar activity remained at low levels. There are currently 9 numbered sunspots with 1652 and 1654 as the largest active regions. Region 1652 is classified as a

January 10, 2013

Progressing toward solar max

The effects of solar variability on Earth's climate

A new report issued by the National Research Council (NRC), "The Effects of Solar Variability on Earth's Climate," lays out some of the surprisingly complex ways that solar activity can make itself felt on our planet.The luminosity of our own sun varies a 0.1% over

January 10, 2013


Low solar activity despite growing Sunspot 1640

Solar activity has been at low levels for the past 24 hours. The largest solar event  was a C1 flare erupting from Sunspot 1640, observed late on the January 3rd. Sunspot 1640 has developed a 'beta-gamma-delta' magnetic field that harbors energy

January 05, 2013

AR1620 M2_2

Sunspot 1620 generated M2.2 solar flare

Sunspot 1620 produced M2.2 solar flare with peak at 21:36 UTC on November 28, 2012. Fast growing sunspot AR1620 has a beta-gamma-delta magnetic field that harbors energy for X-class solar flares. M-class activity is also possible from region AR 1618 which has now

November 28, 2012

AR 1620

Fast growing sunspot AR 1620 harbors energy for strong flares

Five sunspot groups were reported today by Catania. Sunspots AR 1618 and AR 1620 have beta-gamma-delta and beta-gamma configurations of their photospheric magnetic field, respectively, and are being closely monitored for further flaring activity. NOAA/SWPC forecasters

November 26, 2012

1618 featured

Sunspot 1618 facing Earth - Beta-Gamma-Delta magnetic configuration

Active Region 1618 keeps evolving and it has now Beta-Gamma-Delta magnetic configuration  that harbors energy for M- and X-class eruptions. It produced an M3.5 flare with peak at 15:30 UTC on November 21, related to a halo CME first seen at 16:12 UTC by SOHO's LASCO

November 23, 2012

latest_2048_HMIIC 1

New fast growing sunspot forming at southeastern limb

A new sunspot located in the southeast quadrant continues to rapidly grow on Monday morning. Currently this region is not complex and only producing B-Class flares. Continue to monitor this region for further growth. There may soon be a chance for a C-Class flare. The

June 25, 2012


Earth facing side of Sun without active sunspots

The Earth facing side of the Sun is nearly blank today (with the exception of a few very small sunspots). This is yet another example of how weak this current Solar Cycle 24 really is in comparison to the previous cycles during the past 100 years. Hard to believe that

June 22, 2012

sunspot trace

Why Sun won’t forget Calcutta - solar physicist rates Sun's memory

Solar physicist Dibyendu Nandi and PhD student Bidya Binay Karak have shown that the Sun’s memory of its sunspot cycles, long believed to be imprinted in its churning plasma, lasts no longer than five-and-a-half years.Sunspots are regions of strong magnetic fields

June 13, 2012


New sunspot formation

Solar activity is near moderate levels with C-Class flares being detected around a new sunspot that was quickly formed in the southern hemisphere on Tuesday and was numbered 1462.. Another region is forming just to the west of that location and is currently producing

April 18, 2012


Big Sunspot 1429 still erupting, Sunspots 1445 and 1444 pose a new threat

In morning of March 24, a near M-Class flare took place around Sunspot 1445 at around 08:50-09:00 UTC. There was a gap in data on the GOES X-Ray Flux graph, however it was picked up on the EVE Diode X-Ray signal. Comparing it to yesterday's M1.0, it looks like this

March 25, 2012


Return of the old Sunspot 1402

After two-week long transit around the far side of the Sun, Sunspot 1402 has returned into view in the northeast quadrant. Sunspot 1402 is now re-numbered as Sunspot 1419. This region is smaller than it was before, after two weeks of decay. On January 27 it unleashed

February 13, 2012


New large sunspot rotating Earthward on the eastern limb

A new large sunspot is now rotating into view on the eastern limb. It just produced a minor C6.7 Solar Flare at 22:26 UTC Tuesday evening. Solar activity was moderate on Monday with one M-Class flare detected around Sunspot 1387. Numerous C-Class events were

December 28, 2011


Subsiding solar activity, small chances for M-class flares

Two new regions rotated into view on the eastern limb and were numbered 1363 and 1364 on Tuesday. Numerous low level C-Class flares have been detected within the past 24 hours around Sunspot 1362 and new Sunspot 1363.Region 1361 in the northern hemisphere is now

November 30, 2011

John Nassr1_strip

Sunspots connected by sinuos filaments of magnetism

A line of sunspots stretching across the sun's northern hemisphere appears to be an independent sequence of dark cores. A telescope tuned to the red glow of solar hydrogen, however, reveals something different. The sunspots are connected by sinuous filaments of

November 29, 2011


Comparing Sunspot 1339

Sunspot 1339 is indeed one of the largest Sunspot groups in years. Here is a size comparison of 1339 vs. a couple of the largest Sunspots from Cycle 23. Sunspot 9393 was responsible for the second largest Solar Flare in recorded history (X20) back in April 2001.

November 09, 2011

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A Guide for Solar Watchers - Part 1

A Guide for Solar Watchers pt.1 - Sun basics For all those who don't quit understand what is happening with our Sun and what is space weather we decided to make A Guide for Solar Watchers. We will start with solar basics - structure, characteristics, solar

November 05, 2011


Large sunspot group harbors energy for M-class solar flares

A large sunspot group is rotating over the sun's northeastern limb, possibly signaling an uptick in solar activity. Measuring some 40,000 km wide and at least twice that in length, the behemoth active region is an easy target for backyard solar

November 02, 2011


Significant CME heading toward Mars

A significant CME blasted off the sun today, Oct. 22nd, around 1100 UT. Analysts at the Goddard Space Weather Lab say the cloud is heading for Mars, due to hit the Red Planet on Oct. 26th.  (movie, forecast track)While looking at the latest STEREO Ahead images,

October 22, 2011


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

sun licks of flame

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

Pete Lawrence 2011 09 22_12 06 21_SF70ds_1316695287

Long duration X1.4 solar flare took place at new sunspot

Earth-orbiting satellites have detected a long-duration X1.4-class solar fare coming from a new sunspot on the sun's eastern limb. The blast, which peaked at 1100 UT, produced a significant CME, but the cloud is not Earth-directed.

September 22, 2011

John Dean Nome Aurora Seward Aurora Sept 17 2011 772_1316284667_med

Geomagnetic storm in progress

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 sparked a moderate geomagnetic storm (in progress) and auroras around the Arctic Circle. High-latitude sky watch

September 17, 2011


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


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

Steve McDonough CRW_3333_1315681608_med

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


An enormous filament of magnetism slithering over the sun's northeastern limb

Today, NASA's Solar Dynamics Observatory is monitoring sine wave 400,000 km long.  It's an enormous filament of magnetism slithering over the sun's northeastern limb:One of the wave troughs appears to be passing through the core of sunspot 1282. If so, an eruption

September 01, 2011


Active sunspot 1263 has left the Earthside of the sun

Active sunspot 1263, which just two days ago produced the most powerful solar flare of the new Solar Cycle (an X7), has left the Earthside of the sun. It is now beginning a two week transit across the solar farside. We can still see signs of its ongoing activity,

August 12, 2011


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


M1.4 Earth-directed solar flare took place

Magnetic fields above sunspot 1261 erupted this morning at 0648 UT, producing an M1-class solar flare. The blast also hurled a bright coronal mass ejection toward Earth. This movie from the STEREO-Ahead spacecraft shows the cloud racing away from the sun at almost

August 02, 2011


Geomagnetic storm in progress!

Geomagnetic K-index of 5 alert is issued by Space Weather Prediction Center. Kp-indices of 5 or greater indicate storm-level geomagnetic activity. Geomagnetic storms have been associated with satellite surface charging and increased atmospheric drag.Speed of solar

July 30, 2011