Articles tagged "g3 storm"

aurora november 3 2021 Markus Varik f

Series of CMEs impact Earth, sparking G3 - Strong geomagnetic storming

A coronal mass ejection (CME) produced by the long-duration M1.7 solar flare1 at 03:01 UTC on November 2, 2021, reached Earth at 19:57 UTC on November 3, sparking G3 - Strong geomagnetic storming. The CME overtook and merged with at least one, possibly two or more,...

November 04, 2021

aurora forecast model 1301z may 12 2021 f

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

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

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

aurora by dar tanner september 28 2017

G3 - Strong geomagnetic storm levels reached

A recurrent, polar-connected, positive-polarity coronal hole is affecting our planet since September 27. G1 - Minor geomagnetic storm levels were reached at 08:48 UTC on September 27, followed by G2 - Moderate levels at 20:24 UTC and then increased to G3 - Strong...

September 28, 2017

aurora over finland september 8 2017

G4 - Severe geomagnetic storming observed as CME from X9.3 flare impacts Earth

A Coronal Mass Ejection (CME) produced by the X9.3 solar flare on September 6, 2017, reached our planet at 23:04 UTC on September 7, 2017, a full day earlier than it was expected. G3 - Strong geomagnetic storming started 23:25 and increased to G4 - Severe at 23:50...

September 08, 2017

asymmetric full halo cme m5 5 solar flare september 5 2017

Direct CME hit expected, G3 Strong geomagnetic storm watch issued

An asymmetric full halo Coronal Mass Ejection (CME) produced by the M5.5 solar flare at 20:33 UTC on September 4, 2017 is traveling toward Earth and is expected to arrive late on September 6. G3 - Strong geomagnetic storm watch is in effect for September 6 and 7....

September 05, 2017

steve may 28 2017

CME impact sparks G3 - Strong geomagnetic storm

A coronal mass ejection (CME) produced during the early UTC hours of May 23, 2017 hit Earth's magnetic field at 15:36 UTC on May 27, more than 24 hours after it was expected. Although the solar wind speed is relatively slow, the embedded magnetic field had a...

May 28, 2017


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


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


CME impact: Geomagnetic storm reaching G3 Strong levels in progress

Geomagnetic storm reaching G3 Strong levels is currently in progress as a result of Coronal Mass Ejection (CME) impact on top of Coronal Hole High Speed Stream (CH HSS) influence.The CME, produced by September 18th C-class solar flare, reached our planet at 06:05 UTC on

September 20, 2015


Geomagnetic storming continues: G3 Strong levels reached on September 11

​Our planet's magnetic shield is again under stress today with brief G3 Strong geomagnetic storm levels reached around 09:00 UTC. The storms began on September 7 with positive polarity coronal hole reaching geoeffective position and an impact of plasma filament

September 11, 2015

probability_of_visible_aurora_at_12 20_utc_aug152015_f

Geomagnetic storm reaching G3 (Strong) levels in progress, extreme conditions possible

During the last 24 hours, solar wind parameters, measured by the ACE spacecraft, were indicative of background solar wind conditions until 07:45 UTC on August 15, when a sudden impulse occurred due to the arrival of a co-rotating interaction region (CIR) ahead of a

August 15, 2015


Three Earth-directed CMEs trigger G3-Strong Geomagnetic Storm Watch

Coronal Mass Ejections (CMEs) from June 18, 19 and 21 have significantly increased chances for G3-Strong geomagnetic storms on June 22, 2015. Two of the three CMEs were produced by Region 2371, one of the biggest regions of the current solar cycle, which is currently di

June 22, 2015


Two CMEs heading toward Earth, severe geomagnetic storms expected

There are currently two Coronal Mass Ejections (CMEs) heading toward our planet and their combined arrival is expected to spark severe geomagnetic storms.The first one, released by the long duration M4.5 solar flare on September 9, is expected to hit Earth's magneti

September 11, 2014