Geomagnetic storms

pink aurora markus varik january 11 2021 f

Slow-moving transient sparks vivid auroras around the Arctic circle

Solar wind parameters reflected the arrival of a slow-moving transient at approximately 08:23 UTC on January 11, 2021. At this time, density, temperature, and wind speed increased, sparking vivid auroras around the Arctic circle. The cause of the shock wave might...

January 12, 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

solstice aurora by alan c tough scotland via spaceweather f

G1 - Minor geomagnetic storm watch in effect for December 23 and 24

A series of positive polarity, polar connected, coronal hole high speed streams (CH HSS) are expected to affect our planet in the days ahead, resulting in G1 - Minor geomagnetic storming. The area of impact is primarily poleward of 60 degrees Geomagnetic Latitude....

December 22, 2020

aurora forecast 0446z december 10 2020 f

CME impact detected, G3 - Strong geomagnetic storm watch remains but confidence diminishing

A geomagnetic sudden impulse -- CME produced by a long-duration C7.4 solar flare on December 7, was observed at DSCOVR satellite at the L1 point at 01:32 UTC on December 10. The total field reached 16 nT while wind speeds topped out near 571 km/s, producing a period...

December 10, 2020

ovation prime model 08z sep 24 2020 f

CH HSS sparks G1 - Minor geomagnetic storm, G2 - Moderate warning

A recurrent, positive polarity coronal hole high speed stream (CH HSS) is affecting our planet since September 23, sparking active to G1 - Minor geomagnetic storm conditions. A G2 - Moderate geomagnetic storm warning was issued at 08:07 UTC today. In 24 hours to...

September 24, 2020

0440z aug 31 2020 f

Series of coronal holes spark G1 - Minor geomagnetic storming

Our planet is under the influence of a series of coronal holes since August 25, 2020, sparking unsettled to G1 - Minor geomagnetic storm conditions. The effect is expected to continue through at least September 2. G1 - Minor geomagnetic storm threshold was first...

August 31, 2020

probability of visible aurora mr 1110z f

G1 - Minor geomagnetic storm in progress

A negative polarity, southern crown coronal hole extension has moved into a geoeffective position enhancing the solar wind environment. Unsettled levels are expected on April 21 as high speed stream (HSS) effects persist. By late April 22 (UTC), a positive polarity...

April 20, 2020

rare blue aurora feb 18 2020

Rare, vivid blue auroras seen over Norway's Lofoten Islands

Rare, vivid blue auroras were seen over the night sky of Norway's Lofoten Islands on Tuesday, February 18, 2020. Photographer Matthew Steinberg captured the majestic view, which he was able to finally witness after an entire day of snow, sleet, and heavy winds....

February 19, 2020

spotless charmap feb 18 2020 f

Unsettled geomagnetic field due to CH HSS influences

Solar wind parameters in 24 hours ending 12:30 UTC today were indicative of a slightly enhanced and disturbed interplanetary magnetic field (IMF) due to weak coronal hole high speed stream (CH HSS) influences. Total IMF strength was variable, but steadily increased...

February 18, 2020

charmap october 23 2019 f

Earth under the influence of positive polarity CH HSS, G2 - Moderate geomagnetic storm

Earth is under the influence of a positive polarity coronal hole high speed stream (CH HSS). This is causing G1 - Minor to G2 - Moderate geomagnetic storming. Solar wind parameters were at background levels until about 06:00 UTC on October 24 when co-rotating...

October 25, 2019

g1 minor geomagnetic storm watch october 24 25 2019 f

G1 - Minor Geomagnetic Storm Watch in effect for October 24 and 25

A recurrent, positive polarity coronal hole high speed stream (CH HSS) is anticipated to rotate into an Earth-connected position on October 24. As a result, a G1 - Minor Geomagnetic Storm Watch is in effect for Thursday and Friday, October 24 and 25, 2019. A...

October 23, 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

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

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

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