Solar activity - page 2

m5 5 september 4 2017

7 M-class solar flares from geoeffective region, Earth-directed CME produced, S1 radiation storm

Geoeffective Active Region 2673 produced 7 M-class and at least 8 C-class solar flares on September 4, 2017. The strongest was M5.5 at 20:33 UTC associated with an asymmetric full halo Coronal Mass Ejection (CME). This region has the potential to produce more strong...

September 05, 2017

m1 2 solar flare september 4 2017

Geoeffective Region 2673 unleashed M1.2 solar flare, Earth-directed CMEs possible

A large and geoeffective Active Region 2673 (beta-gamma) unleashed a moderately strong M1.2 solar flare at 05:49 UTC on September 4, 2017. The event started at 05:36 and ended at 06:05 UTC. The region increased 10-fold in a single day, suddenly becoming one of the...

September 04, 2017

m1 1 solar flare august 20 2017

Solar flare measuring M1.1 erupts from Region 2672

A moderately strong solar flare measuring M1.1 erupted from new Region 2672 (beta) at 01:52 UTC on August 20, 2017. The event started at 01:36 and ended at 02:03 UTC. Solar activity was at moderate levels on August 20 due to an M1 flare from an emerging region on...

August 20, 2017

farside eruption july 23 2017

Major solar flare erupts near the eastern limb, no Earth-directed CMEs

A pair of solar flares erupted near the eastern limb of the Sun at about 00:55 and 03:25 UTC on July 23, 2017 and were observed in STEREO-A EUVI 195 imagery. The source is Active Region 2665 which produced a long-duration M2.4 solar flare and Earth-directed CME on...

July 23, 2017

CME july 14 2017 m2 4 solar flare

Long-duration M2.4 solar flare erupts, Earth-directed CME

Active Region 2665 produced a long-duration solar flare measuring M2.4 at its peak time on July 14, 2017. Today's event lasted for more than 2 hours; it started at 01:07, peaked at 02:09 and ended at 03:24 UTC. The eruption produced a coronal mass ejection (CME)...

July 14, 2017

m1 2 solar flare july 9 2017

Impulsive M1.3 solar flare erupts from big Region 2665

Big sunspot region 2665 (beta) erupted with an impulsive solar flare measuring M1.3 at its peak time on July 9, 2017. The event started at 03:09, peaked at 03:18 and ended at 03:37 UTC. The last time our star unleashed an M-class solar flare was on July 4, 2017....

July 09, 2017

m1 3 solar flare july 3 2017 sdo aia 304

Impulsive M1.3 solar flare erupts near the west limb

Solar activity was at moderate levels on July 3, 2017, with 14 B-class and one impulsive M1.3 solar flare observed at 16:15 UTC. The M-class event started at 15:37 and ended at 16:18 UTC. The last time our star unleashed an M-class solar flare was on April 3, 2017....

July 04, 2017

partial halo cme june 28 2017 lasco c2

Partial-halo CME impact sparks G1 geomagnetic storm

A partial-halo coronal mass ejection (CME) produced on June 28, 2017 hit Earth's magnetic field at 17:12 UTC on July 1, almost 24 hours earlier than expected. The impact was weak but managed to spark a G1 - Minor geomagnetic storm 17 hours later. G1 Watch...

July 02, 2017

cme impact model may 26 2017

CME headed toward Earth, impact expected around 12:00 UTC on May 26

An eruption near the center of Earth-facing side of the Sun produced a partial HALO CME (coronal mass ejection) during the early UTC hours of May 23, 2017. The CME is weak, but it has an Earth-directed component. Arrival at Earth is expected around 12:00 UTC on May...

May 24, 2017

filament eruption april 9 2017

Filament eruption, glancing blow possible on April 15

An approximate 14 degree solar filament eruption began at 20:25 UTC on April 9, 2017, from the northeast quadrant of the Sun. The event generated a coronal mass ejection (CME) and a glancing blow is possible on April 15. The CME was first observed in SOHO/LASCO C2...

April 11, 2017

M5 8 april 3 2017

Moderately strong M5.8 solar flare erupts from Region 2644

A moderately strong solar flare measuring M5.8 (R2 - Moderate) erupted from Region 2644 at 14:29 UTC on April 3, 2017. The event started at 14:19 and ended at 14:34 UTC. This is the 7th and the strongest M-class solar flare since late April 1, 2017. It is also the...

April 03, 2017

m 4 4 solar flare april 1 2017

Seven M-class solar flares erupt from Region 2644

Departing Active Region 2644 erupted with seven M-class solar flares since late April 1, 2017. The series started with M4.4 on April 1 and was followed by M5.3, M2.3, M2.1 and M5.7 on April 2, and M1.2 and M5.8 on April 3. Multiple coronal mass ejections were...

April 02, 2017

nasa sdo aia 131 17 24 z november 29 2016

Impulsive M1.0 solar flare erupts from Region 2615

An impulsive, moderately strong solar flare measuring M1.0 at its peak erupted at 17:26 UTC on November 29, 2016. The event started at 17:19 and ended at 17:26 UTC. This is the first M-class solar flare since M1.3 on August 7, 2016. With the approach of solar...

November 29, 2016


Spotless Sun heralds Solar Minimum after CME producing Region 2567 departs

After Active Region 2567, the source of 7 M-class and numerous C-class solar flares between July 21 and 24, rotated away from the visible disk, our Earth facing Sun is again spotless. This is the third 'spotless Sun' since June 3, and although it is a...

July 25, 2016

m5 5_solar_flare_at_05 31_utc_on_23jul2016_f

3 strong M-class solar flares erupt from Region 2567, CME produced

Three strong solar flares erupted from Active Region 2567 early on July 23, 2016 - M5.0, M7.6, and M5.5. A Coronal Mass Ejection (CME) was produced during the third one, however, this region is not in a position to produce Earth-directed CMEs. The first flare...

July 23, 2016


Two M1 solar flares, flurry of C-class erupt from geoeffective Region 2567

After more than 3 months without any significant solar flare, our sun produced two consecutive M-class flares early on July 21, 2016. The source was Active Region 2567 ('beta-gamma' / 'beta'), currently moving out of its geoeffective position....

July 21, 2016


Faint, asymmetric halo CME combined with CH HSS to hit Earth's magnetic field on July 21

Although solar activity was at low levels on July 17, 2016, geoeffective Active Region 2567 ('beta-gamma') managed to produce a long duration C1 solar flare. The event peaked at 06:42 UTC, producing a faint, asymmetric halo Coronal Mass Ejection (CME)....

July 19, 2016