Geomagnetic storms

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Modest CME glancing blow from May 28 long-duration solar flare

A small part of coronal mass ejection (CME) produced by a long-duration C-class solar flare on May 28 hit Earth on June 2, 2021, barely disturbing Earth's magnetic field. Solar wind parameters are likely to become slightly enhanced due to the influence of a...

June 03, 2021

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Geomagnetic storm watch in effect for May 18

NOAA SWPC forecasters have issued a geomagnetic storm watch for May 18, 2021, after a pair of coronal mass ejections (CMEs) launched from the Sun on May 13 and 14. Enhanced solar wind parameters are expected on May 17 due to the influence of a negative polarity...

May 17, 2021

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CME impacts Earth, sparking G3 - Strong geomagnetic storm

A coronal mass ejection (CME) produced by a filament eruption around 10:00 UTC on May 9, 2021, has reached Earth at 06:43 UTC on May 12. G3 - Moderate geomagnetic storm levels were observed at 12:59 UTC. The CME arrived at the DSCOVR spacecraft at 05:47 UTC. Solar...

May 12, 2021

wsa enlil cme fcst april 25 2021

G2 - Moderate geomagnetic storm watch in effect for April 25

A partial halo Coronal Mass Ejection (CME) produced by the C3.8 solar flare from Region 2816 at 04:35 UTC on April 22 is heading toward Earth and is expected to arrive on April 25. As a result, a G2 - Moderate geomagnetic storming is expected. This CME has been...

April 24, 2021

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Negative polarity CH HSS sparks G2 - Moderate geomagnetic storm

Earth is under the influence of negative polarity coronal hole high speed stream (CH HSS) over the past 24 hours, sparking G2 geomagnetic storming. The source is a polar connected coronal hole located in the Sun's southern hemisphere. Geomagnetic K-index of 5...

March 20, 2021

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Negative polarity CH HSS sparks G1 - Minor geomagnetic storm and auroras in the lower 48

Earth is under the influence of a negative polarity coronal hole high speed stream, sparking G1 - Minor geomagnetic storm and auroras as low as Michigan and Wisconsin, U.S. Enhanced solar wind parameters were observed on March 13, 2021, due to co-rotating...

March 14, 2021

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Negative polarity CH HSS sparks G2 - Moderate geomagnetic storm

Earth is under the influence of a negative polarity coronal hole high speed stream (CH HSS) on March 1, 2021, sparking G1 - Minor and G2 - Moderate geomagnetic storming. Solar wind speed started increasing late February 28, from 369 km/s at 22:00 UTC to 521 km/s at...

March 01, 2021

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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

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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

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

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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

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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

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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

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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

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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

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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