Space weather

s25 kitiashvili

Irina Kitiashvili with the NASA Solar Cycle 25 Forecast

Next solar cycle - Solar Cycle 25 - is expected to be the lowest in 200 years. The forecast for the next solar cycle says it will be the weakest of the last 200 years. The maximum of this next cycle – measured in terms of sunspot number, a standard measure of...

June 26, 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

c9 9 solar flare 0512z may 6 2019 f

C9.9 solar flare erupts from AR 2740, the strongest since October 2017

A moderately strong solar flare measuring C9.9 erupted from AR 2740 (Beta-Delta) at 05:10 UTC on May 6, 2019. The event started at 05:04 UTC and ended at 05:12 UTC. This is the strongest solar flare since M1.0 at 23:28 UTC on October 20, 2017. A Type II Radio...

May 06, 2019

c5 6 solar flare march 21 2019 f

Impulsive C5.6 solar flare erupts from AR 2736, source of yesterday's full-halo CME

An impulsive solar flare measuring C5.6 at its peak time erupted from AR 2736, the source of yesterday's C4.8 and associated asymmetric full-halo CME, at 03:12 UTC on March 21, 2019. The event started at 03:08 and ended at 03:15 UTC. There were no radio...

March 21, 2019

c4 8 solar flare march 20 2019 f

C4.8 solar flare erupts from AR 2736, full-halo CME produced

A solar flare measuring C4.8 at its peak erupted from newly-emerged AR 2736 on March 20, 2019. The eruption started at 10:35, peaked at 11:18 and ended at 11:34 UTC. The region was also responsible for several B-class flares over the past 7 hours. The flare was...

March 20, 2019

c1 3 solar flare 0342z march 8 2019 f

C1.3 solar flare erupts from geoeffective Region 2734, CME impact expected March 11

A long-duration solar flare measuring C1.3 at its peak erupted from Region 2734 (Alpha) at 03:19 UTC on March 8, 2019. The event started at 03:07, peaked at 03:19 and ended at 03:58 UTC. This event was associated with a Type II Radio Emission registered at 03:15 UTC...

March 08, 2019

aurora over alta norway by h j sperr february 27 2019

Negative polarity CH HSS sparks geomagnetic storming

An isolated, negative polarity Coronal Hole High Speed Stream (CH HSS) is affecting our planet on February 27 and 28, 2019, causing isolated periods of geomagnetic storming. Solar winds over the past 24 hours were indicative of an anticipated Solar Sector Boundary...

February 28, 2019

international sunspot numbers silso feb 1 2019

Cosmic rays in Earth's atmosphere intensifying for the fourth year in a row

Cosmic rays in Earth's atmosphere are intensifying for the 4th year in a row as the 11-year solar cycle plunges into one of the deepest minima of the Space Age. The finding comes from a campaign of almost weekly high-altitude balloon launches conducted by the...

February 27, 2019

c5 solar flare january 26 2019

C5.0 solar flare erupts from AR2733, the strongest since February 18, 2018

A weak solar flare measuring C5.0 at its peak erupted from Active Region 2733 at 13:22 UTC on January 26, 2019. The eruption started at 13:12 and ended at 13:34 UTC. This was the strongest solar flare since February 18, 2018. It was preceded by B1.5 at 03:49 UTC,...

January 26, 2019

aurora january 5 2019 by adrien mauduit

Negative polarity CH HSS sparks G1 - Minor geomagnetic storming

A large negative polarity coronal hole is affecting our planet, causing G1 - Minor geomagnetic storming. Geomagnetic K-index of 5 (G1 - Minor geomagnetic storm) threshold was reached at 01:37 UTC, January 5, 2019. Solar wind parameters, as measured by the DSCOVR...

January 05, 2019

aurora forecast mr 1411z december 28 2018

Positive polarity coronal hole high speed stream sparks geomagnetic storm

A positive polarity coronal hole high speed stream (CH HSS) is affecting our planet since late December 27, sparking G1 - Minor geomagnetic storm. Periods of active conditions are likely through December 29 followed by quiet to unsettled activity on December 30...

December 28, 2018

geomagnetic storm montana november 5 2018

CH HSS sparks G2 - Moderate geomagnetic storm

Our planet is under the influence of a positive polarity Coronal Hole High Speed Stream (CH HSS) over the past 24 hours. Geomagnetic storms reaching G2 - Moderate levels were registered November 5. Solar wind parameters reflected the passage of a Solar Sector...

November 05, 2018

af 21 10 utc oct 8 2018 f

Coronal hole high speed stream sparks geomagnetic storm

Earth is under the influence of a positive polarity coronal hole high speed stream (CH HSS) on October 7 and 8, 2018. G1 - Minor geomagnetic storm conditions were observed at 16:22 UTC and 20:42 UTC on October 7, 2018. A G2 warning has been issued and is valid until...

October 08, 2018

char september 10 2018

Positive polarity CH HSS sparks geomagnetic storming

A G2 - Moderate geomagnetic storm watch has been issued for September 11, 2018 due to the onset of positive polarity coronal hole high speed stream. Solar wind parameters over the past 24 hours were descriptive of the passage of Co-rotating Interaction Region (CIR)...

September 11, 2018

2018 08 26_12h24_16

CME sparks G3 Strong geomagnetic storm; reverse polarity sunspot appears on the Sun

G3 Strong geomagnetic storm levels associated with the passage of slow-moving August 20th Coronal Mass Ejection were observed early August 26, 2018. A faint and slow-moving CME was first seen in LASCO coronagraph imagery at approximately 22:00 UTC on August 20. The...

August 26, 2018

aia 304 at 00 58 utc july 5 2018

Plasma filament eruptions detected on the Sun, Earth-directed CME possible

Two plasma filament eruptions were detected on the Sun on July 5, 2018, and it seems at least one weak Earth-directed Coronal Mass Ejection (CME) was produced; ETA July 9 or 10. In addition, a relatively strong farside eruption took place on July 5 and its CME (not...

July 06, 2018