Geomagnetic storms

geoeffective coronal hole may 12 2017

G2 - Moderate geomagnetic storms expected

Geomagnetic storms reaching G2 - Moderate levels are expected over the next 48 hours due to the influence of a geoeffective coronal hole in combination with an Earth-directed component of coronal mass ejection (CME) produced on May 13. The first effects are expected...

May 15, 2017

aurora south dakota by christian begman on april 21 2017

G2 - Moderate geomagnetic storm, aurora seen as far south as Colorado

A potent coronal hole has become geoeffective and possibly in a combination with an April 18 CME is causing geomagnetic storms reaching G2 levels. This is the second of two geoeffective coronal holes to affect Earth this week. The effects are expected to persist...

April 22, 2017

coronal holes april 20 2017

G2 - Moderate geomagnetic storm level reached

A G2 - Moderate geomagnetic storm conditions were reached at 04:33 UTC on April 20, 2017. This activity is a result of continued coronal hole effects, the first of two expected to affect our planet this week. The geomagnetic field reached G1 - Minor levels during...

April 20, 2017

aurora forecast model run 08 46 Z April 19 2017

Geomagnetic storms reaching G1 level expected

Earth is under the influence of a recurrent, positive polarity coronal hole high speed stream (CH HSS). A G1 - Minor geomagnetic storm began at 05:59 UTC today. Solar wind parameters, as measured by the DSCOVR spacecraft, continued at mostly nominal levels over the...

April 19, 2017

aurora forecast 09 40 utc apri 4 2017

G1 - Minor geomagnetic storm in progress

A G1 - Minor geomagnetic storm is in progress as of 08:14 UTC on April 4, 2017, due to Earth's proximity to the heliospheric current sheet (HCS) and weak influences of the southern polar, negative coronal hole high speed stream (CH HSS). Geomagnetic K-index of 5...

April 04, 2017

geomagnetic storms begin as potent coronal hole becomes geoeffective

Geomagnetic storms begin as potent coronal hole becomes geoeffective

A recurrent, negative-polarity coronal hole is affecting our planet, causing geomagnetic storming. A G2 - Moderate geomagnetic storm watch is in effect for March 28 and 29. A high speed solar wind stream produced by a recurrent, negative-polarity (potent) coronal...

March 27, 2017

sdo aia geoeffective coronal hole

CH HSS sparks geomagnetic storming, G2 warning issued

Earth is under the influence of a positive polarity coronal hole high speed stream (CH HSS) which is causing geomagnetic storming. G1 - Minor geomagnetic storm threshold was first reached at 16:12 UTC on March 21, 2017. A G2 - Moderate geomagnetic storm warning was...

March 21, 2017

Earth under influence polar connected CH HSS

Earth under the influence of polar-connected CH HSS

A negative polarity, polar-connected coronal hole high speed stream (CH HSS) is affecting Earth for the second day in a row, sparking geomagnetic storms reaching G2 Moderate levels. Over the past 24 hours, the solar wind environment was elevated due to the passage...

March 02, 2017

recurrent ch hss sparks g1 geomagnetic storm

Negative polarity CH HSS sparks G1 geomagnetic storm

Earth is under the influence of a recurrent, polar-connected coronal hole which has sparked G1 (Minor) geomagnetic storming today. Unsettled to active conditions, with G1 storming likely, are expected to continue through March 2. Geomagnetic K-index of 5 (G1 - Minor...

March 01, 2017

geomagnetic storm february 24 2017

CH HSS sparks geomagnetic storm reaching G1 levels

Our planet is under the influence of a recurrent, positive polarity coronal hole high speed stream since around 20:48 UTC on February 23. This is causing G1 geomagnetic storming. Geomagnetic K-index of 5 (G1 - Minor geomagnetic storm) threshold was first reached at...

February 24, 2017

geomagnetic storm february 1 2017

G1 geomagnetic storm in progress

A recurrent, negative polarity coronal hole high-speed stream (CH HSS) is affecting our planet causing isolated periods of G1 Minor geomagnetic storming and vivid auroras. High-speed solar wind speed hit Earth late January 31, 2017. Geomagnetic K-index of 5 (G1 -...

February 01, 2017

g2 geomagnetic storm aurora forecast december 21 2016

G2 geomagnetic storm in progress

Earth is under the influence of a positive polarity coronal hole high speed stream today, December 21, 2016, which is causing geomagnetic storms reaching G2 Moderate levels. Shortly after 04:00 UTC on December 21, solar wind speeds increased to just over 500 km/s,...

December 21, 2016

9aurora forecast december 9 2016 21 50 z

G1 geomagnetic storm in progress

A geomagnetic storm is currently in progress due to ongoing negative polarity coronal hole high speed stream (CH HSS) influence. The G1 Watch is in effect for the next three days. Geomagnetic K-index of 5 (G1 - Minor geomagnetic storm) threshold was first reached at...

December 09, 2016

Aurora outburst Mia Stalnacke_ November 24 2016 Kiruna Sweden

Positive polarity CH HSS sparks geomagnetic storms

Earth is under the influence of a positive polarity coronal hole high speed stream (CH HSS). A sudden escalation in overall planetary geomagnetic response from a favorable solar wind environment and elevated solar wind streams triggered periods of G1 and G2...

November 25, 2016

coronal hole october 25 2016 aia 211 193 171 f

Geomagnetic storm in progress, CH HSS influence expected until October 27

​Earth is passing through a stream of high speed solar wind produced by a recurrent, polar connected, positive polarity coronal hole. This is causing isolated periods of G1 class geomagnetic storming. G2 - Moderate geomagnetic storm watch is in effect for October...

October 25, 2016

aurora forecast ovation prime model run at 22 41z october 13 2016 f

G2 geomagnetic storm in progress, G3 - Strong watch in effect for October 14

A filament in Sun's northeast quadrant erupted between 15:00 and 17:00 UTC on Saturday, October 8, 2016, producing an asymmetric, partial-halo CME. The CME, although faint, was first observed in LASCO C2 imagery beginning 00:48 UTC on October 9. It reached ACE...

October 13, 2016

aurora australis by varun dongre at maitri research base antarctica september 29 2016

Prolonged geomagnetic storming, isolated periods of G2 - Moderate levels

Earth is under the influence of a positive polarity coronal hole high speed stream (CH HSS) for several days now. Enhanced solar wind parameters are expected to continue through October 1, with G3 - Strong geomagnetic storm levels possible today. G2 - Moderate...

September 29, 2016