Solar activity

sdo aia 171 july 20 2021 1646z f

Glancing blow CME possible on July 23, G1 Geomagnetic Storm Watch

A glancing blow CME from the July 20 eruption could bring a chance for G1 - Minor geomagnetic storm condition on July 23, 2021. As a result, a G1 Geomagnetic Storm Watch is in effect. A ~4-degree solar filament centered at approximately N25E65 erupted from the...

July 22, 2021

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Major X1.5 solar flare erupts -- the first X-class flare of Solar Cycle 25

A major solar flare measuring X1.5 at its peak erupted on the Sun's NW limb -- most likely from the newly-formed Active Region 2838 -- on July 3, 2021, producing R3 - Strong radio blackout. The event started at 14:18, peaked at 14:29, and ended at 14:34 UTC....

July 03, 2021

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Moderately strong M2.7 solar flare erupts from Region 2838

A moderately strong solar flare measuring M2.7 at its peak erupted from the newly-formed Active Region 2838 on July 3, 2021. The event started at 07:04 UTC, peaked at 07:17, and ended at 07:22. The position of this region does not favor Earth-directed coronal mass...

July 03, 2021

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Long-duration C9.4 solar flare erupts from AR 2824, generating fast CME and S1 - Minor solar radiation storm

A long-duration C9.4 solar flare erupted from Active Region 2824 at 23:13 UTC on May 28, 2021, producing a strong coronal mass ejection (CME) and S1 - Minor proton radiation storm. The flare event was associated with Type II Radio Emission with an estimated velocity...

May 29, 2021

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Multiple Earth-directed CMEs produced over the weekend

Solar activity has increased from low to moderate levels on Saturday and Sunday, May 22 and 23, 2021, with a series of C- and M-class solar flares produced by Active Region 2824. Multiple CMEs were produced during this period, with several having Earth-directed...

May 24, 2021

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Moderately strong M1.1 solar flare erupts from Region 2824

A moderately strong solar flare measuring M1.1 at its peak erupted from Active Region 2824 (Alpha) at 17:11 UTC on May 22, 2021. The event started at 17:03 and ended at 17:16 UTC. Its location does not favor Earth-directed CMEs, but there is a possibility that a...

May 22, 2021

may 9 2021 cme impact forecast

Incoming CME, impact expected early May 12

Two coronal mass ejections (CMEs) with Earth-directed components were produced on the Sun on May 9, 2021. The impact is expected early Wednesday, May 12. Active Region 2833 produced a long-duration C-class solar flare measuring C4.0 at its peak at 14:49 UTC on May 9...

May 10, 2021

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M3.9 solar flare erupts from Active Region 2822

A strong solar flare measuring M3.9 at its peak erupted from Active Region 2822 at 19:04 UTC on May 7, 2021. While this is one of the strongest solar flares of the new solar cycle -- SC25, the location of region 2822 does not favor Earth-directed CMEs. This event...

May 08, 2021

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C3.8 solar flare erupts from geoeffective Region 2816, CME produced

A C3.8 solar flare erupted from Active Region 2816 at 04:35 UTC on April 22, 2021, producing a coronal mass ejection (CME). The event started at 04:10 and ended at 05:00 UTC. The location of the source region favors Earth-directed CMEs. The flare was associated with...

April 22, 2021

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M1.1 solar flare erupts from AR 2816, produces coronal mass ejection (CME)

A moderately strong solar flare measuring M1.1 at its peak erupted at 23:42 UTC on April 19, 2021. The event started at 23:19 and ended at 23:59 UTC. The source was Active Region 2816 (beta). Associated with this event were Type II (shock velocity of 750 km/s) and...

April 20, 2021

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Solar wind parameters indicate the arrival of a slow-moving CME

Solar wind parameters over the past 12 hours indicated the arrival of a slow-moving Coronal Mass Ejection (CME), likely produced on April 10. A period of G1 - Minor storming began at 08:59 UTC on April 15. Another enhancement in parameters is expected on April 16...

April 15, 2021

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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

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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

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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

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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

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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

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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