Solar activity

1138z feb 20 2021 sdo aia 304 f

Filament eruption produces partial-halo CME, glancing blow expected

A solar filament eruption took place shortly before 12:00 UTC on February 20, 2021, producing a partial-halo CME. Analysis suggests a glancing blow from the periphery of the CME is likely on February 23 or 24. The CME signature was first observed in SOHO/LASCO C2...

February 22, 2021

filament eruption 1119z january 2 2021 f

Unsettled to active geomagnetic field levels expected, G1 geomagnetic storm watch in effect

Unsettled to active geomagnetic field levels are possible on January 5, 2021, due to the onset of an anticipated Solar Sector Boundary Crossing (SSBC) followed by coronal hole influence late in the day. G1 - Minor geomagnetic storm conditions are likely on January 6...

January 05, 2021

C7 4 solar flare December 7 2020 AIA 131 f

Long-duration C7.4 solar flare produces asymmetric full halo CME, impact expected on December 9

A long-duration solar flare measuring C7.4 at its peak erupted from Active Region 2790 -- positioned in Earth-striking zone -- at 16:32 UTC on December 7, 2020. The event started at 15:46, peaked at 16:32, and ended at 17:33 UTC. An asymmetric full halo coronal mass...

December 08, 2020

sdo aia 131 1308z november 29 2020 f

Moderately strong M4.4 solar flare erupts, CME produced

A moderately strong solar flare measuring M4.4 at its peak erupted at 13:11 UTC on November 29, 2020, from a region about to rotate into Earth view. The event started at 12:34 and ended at 13:41 UTC. This is the strongest solar flare in more than 3 years. A Type II...

November 29, 2020

active region 2786 0945z nov 28 2020 f

Biggest sunspot in years producing multiple B- and C-class solar flares

Although solar activity remains at low levels, Active Region 2786 -- the biggest sunspot in years -- has produced multiple C- and B-class flares since November 25. Coronal Mass Ejections (CMEs) were also observed, but none was Earth-directed. While we are still...

November 28, 2020

sdo aia 131 0615z october 27 2020 f

Glancing blow CME possible on November 1

A Coronal Mass Ejection (CME) produced by a C4.3 flare at 06:16 UTC on October 27, 2020, was analyzed by the SWPC and determined to be a possible glancing blow on November 1. The source of the flare was a large AR 2778 which produced multiple B- and C-class flares...

October 28, 2020

b1 2 solar flare august 16 2020 f

Glancing-blow expected after weak B1.2 solar flare

A weak solar flare measuring B1.2 at its peak erupted on August 16, 2020, producing a coronal mass ejection (CME). Consensus model results suggest an arriving glancing blow on August 20 -- producing unsettled to active geomagnetic field conditions, with a chance for...

August 18, 2020

solar flare 2 july 15 2020 3

Study finds correlation between solar activity and large earthquakes worldwide

A new study published in the Nature Scientific Reports on July 13 suggests that powerful eruptions on the Sun can trigger large earthquakes on Earth. In the paper, the authors analyzed 20 years of proton density and velocity data, as recorded by the SOHO satellite,...

July 16, 2020

aurora sac

Solar storm hits Earth, sparking active geomagnetic conditions

Our Sun launched two solar storms this week, one of which was Earth-directed, Space Weather Physicist Dr. Tamitha Skov reports in her latest space weather forecast released July 14, 2020. The storm has hit, right on time, and all through the night people have been...

July 15, 2020

m1 1 solar flare stereo a euvi 195 07 25z may 29 2020 f

First M-class solar flare of Solar Cycle 25 - Impulsive M1.1 at 07:24 UTC on May 29

A moderately strong solar flare measuring M1.1 erupted at 07:24 UTC on May 29, 2020. This is the first M-class solar flare of the new solar cycle -- Solar Cycle 25. The event started at 07:13, peaked at 07:24, and ended at 07:28 UTC. The eruption took place on the...

May 29, 2020

cosmic rays oulu feb 19 2020 f

Deep-space radiation reaching a percentage point of Space Age maximum

Solar activity is at very low levels and the visible disk remains spotless for the 17th day in a row, making a total of 33 days in 2020 or 66 percent -- we are still in a Solar Minimum, which is expected to end sometime this year. As a result of weakened Sun's...

February 19, 2020

ar 2753 deceber 24 2019 1230z ft

First multi-spot group of Solar Cycle 25 - Active Region 2753 numbered on December 24, 2019

After 40 days with no sunspots on the Earth-facing side of the Sun, a new sunspot emerged near the southeast limb of the Sun on December 23, 2019, and was numbered Active Region 2753 on December 24. The region has magnetic polarity -/+, opposite of +/- magnetic...

December 24, 2019

star charmap september 26 2019

G2 - Moderate Geomagnetic Storm Watch in effect

The solar wind environment is expected to become enhanced and disturbed later on September 27, 2019 (UTC). G1 - Minor Geomagnetic Storm Watch is in effect for September 27, G2 - Moderate for September 28. Quiet to unsettled geomagnetic field conditions are expected...

September 27, 2019

ace mag swepam 3 day

Enhanced solar wind environment after glancing blow from a slow-moving CME

Solar wind parameters over the past 24 hours were indicative of enhanced solar wind environment, likely caused by a combination of a glancing blow from a slow-moving Coronal Mass Ejection and influences of a negative polarity CH HSS. Total IMF strength was at 5 to 6...

September 25, 2019

aurora fcst g2 watch in effect sep 1 2019 f

Earth enters a stream of fast-moving solar wind, G2 - Moderate Geomagnetic Storm Watch in effect

Our planet has entered a stream of fast-moving solar wind flowing from a large positive polarity coronal hole. A G1 - Minor Geomagnetic Storm Watch is in effect for August 31 and G2 - Moderate for September 1. Solar wind parameters reflected a slow regime through...

August 31, 2019

2112z may 12 2019 sdo aia 304

5 Earth-directed CMEs, G3 - Strong geomagnetic storm

A several degree long solar filament south of the Region 2741 disappeared by approximately 15:14 UTC on May 13, 2019. Initial analysis suggests an Earth-directed component is likely with this Coronal Mass Ejection (CME). This is the fifth Earth-directed CME since...

May 14, 2019

full halo cme impact forecast may 2019 f

Asymmetric full halo CME impact expected late May 11 into May 12

An asymmetric full halo CME with a likely Earth-directed component erupted May 6, 2019. The source is still unknown, it is possible this was another stealth CME. Sun's northeastern limb continued exhibiting increased CME activity on May 6 and 7, 2019. This...

May 08, 2019