Geomagnetic storms - page 3

coronal hole 27 september 2016 sdo aia

Recurrent coronal hole sparks another round of geomagnetic storming

High-speed solar wind from a recurrent coronal hole has sparked another round of geomagnetic storming on Earth. The solar wind environment is expected to remain elevated but steady through the rest of the UTC day before becoming further enhanced on September 28 and...

September 27, 2016

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G1 - Minor geomagnetic storm conditions observed

During the past 24 hours, solar wind parameters transitioned from near background conditions to an enhanced state, causing G1 - Minor geomagnetic storming on Earth. This was most likely caused by the onset of co-rotating interaction region (CIR) ahead of a negative...

September 20, 2016

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Positive polarity CH HSS sparks geomagnetic storm

Earth is under continued influence of a positive polarity coronal hole high speed stream (CH HSS), which is now causing geomagnetic storms at high latitudes. K-index of 5 (G1 - Minor geomagnetic storm) threshold was reached at 08:59 UTC on September 1, 2016. ...

September 01, 2016

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Geomagnetic storm in progress

A geomagnetic storm reaching G1 - Minor levels is currently in progress following the early arrival of July 17th Coronal Mass Ejection (CME). The interplanetary shockwave produced by the long duration C1 flare on July 17, initially expected to arrive early on July...

July 20, 2016

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Negative polarity CH HSS drives isolated periods of geomagnetic storming

Solar wind parameters reflected a brief enhancement associated with the arrival of a co-rotating interaction region (CIR) and subsequent negative polarity coronal hole high speed stream (CH HSS) late June 22, 2016. A gradual increase in solar wind speeds began after...

June 23, 2016

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Geoeffective coronal hole, geomagnetic storm in progress

A co-rotating interaction region (CIR) - the transition zone between slow- and fast-moving streams of solar wind - has hit Earth's magnetic field on June 14, 2016, sparking geomagnetic storms. As of 19:55 UTC, a G2 - Moderate geomagnetic storm is in progress and...

June 14, 2016

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Recurrent CH HSS causing geomagnetic storms

A recurrent, negative polarity coronal hole high speed stream (CH HSS) has hit Earth's magnetic field causing geomagnetic storms on June 5, 2016. A G2 (Moderate) geomagnetic storm watch is currently in effect. This same CH HSS has affected Earth on May 8 with...

June 05, 2016

probability_of_visible_aurora_08 05_ut_8may2016_f

Strong geomagnetic storms in progress

A G3 - Strong geomagnetic storm conditions were observed beginning 05:59 UTC on May 8, 2016. G2 - Moderate to G3 - Strong geomagnetic storm conditions are expected through the rest of the day and possibly into May 9 and 10. This activity is caused by a recurrent,...

May 08, 2016

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G2 - Moderate geomagnetic storm

Enhanced solar wind conditions have fueled elevated geomagnetic field activity early May 2, 2016. Geomagnetic storms reaching G2 - Moderate levels have been observed. Geomagnetic K-index of 5 (G1 - Minor geomagnetic storm) threshold was first reached at 00:37 UTC on...

May 02, 2016

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CH HSS causing isolated periods of G1 - Minor geomagnetic storming

Earth is under the influence of negative polarity coronal hole high speed stream (CH HSS) since late April 12, 2016. This is causing isolated periods of G1 - Minor geomagnetic storming. Geomagnetic K-index of 5 (G1 - Minor geomagnetic storm) threshold was first...

April 14, 2016

aurora_forecast_22 05_ut_7apr2016_f

Geomagnetic storm in progress

A geomagnetic storm reaching G1 - Minor levels is currently in progress as Earth enters a stream of positive polarity high-speed solar wind. Geomagnetic K-index of 5 (G1 - Minor geomagnetic storm) threshold was reached at 20:40 UTC on April 7: Space Weather Message...

April 07, 2016

probability_of_visible_aurora_obs_19 05_utc_2apr2016_f

Recurrent CH HSS causing geomagnetic storming on Earth

Our planet is passing through a stream of fast-moving, negative polarity solar wind. Geomagnetic storming reached G1 - Minor levels at 17:24 UTC. A G2 - Moderate warning is in effect for the rest of the UTC day. This is a recurrent CH HSS, responsible for G3 -...

April 02, 2016

ch02_15mar2016_soa_aia

A new round of geomagnetic storming sparked

A new round of geomagnetic storming is in progress on March 15, 2016. Solar wind parameters are enhanced since late March 14 due to the onset of a negative polarity coronal hole high speed stream (CH HSS) and are expected to remain like that through March 16....

March 15, 2016

aurora_11march2016_by_sachalayos_at_fairbanks

G2 - Moderate geomagnetic storm in progress

After strong G3 geomagnetic storm on March 6 and 7, solar wind parameters increased again around 04:00 UTC on March 11. The cause is most likely a Coronal Mass Ejection (CME) from March 6. Interplanetary magnetic field (IMF) total field (Bt) valuese steadly...

March 11, 2016

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Negative polarity CH HSS causes geomagnetic storming on Earth

A negative polarity, coronal hole high speed stream (CH HSS) became geoeffective early March 6, 2016, causing an increase in solar wind speeds and an enhanced interplanetary magnetic field. A G1 - Minor geomagnetic storm began at 17:28 UTC, increased to G2 -...

March 06, 2016

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Coronal hole causes G1 - Minor geomagnetic storm

A geomagnetic storm reaching G1 - Minor levels is currently in progress due to the arrival of the co-rotating interaction region (CIR) associated with coronal hole 55. The proton flux might reach S1 - Minor levels in the period between February 16 and 18 due to the...

February 16, 2016

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CME hits Earth, G3 Strong geomagnetic storming expected

The December 28th coronal mass ejection (CME) produced by the long duration M1.8 solar flare passed the ACE spacecraft at 00:02 UTC on December 31 and reached our planet at 00:51 UTC. Geomagnetic K-index of 4 threshold was reached at 01:05 UTC. The impact is...

December 31, 2015