Geomagnetic storms

aurora forecast july 22 2017 at 08 46 utc

Positive polarity CH HSS sparks G1 geomagnetic storm

A positive polarity coronal hole high speed stream (CH HSS) is affecting our planet and will continue to do so over the next three days. Over the past 24 hours, by 12:30 UTC on July 22, solar wind parameters as measured by DSCOVR spacecraft reflected the influence...

July 22, 2017

july 14 2017 coronal mass ejection

CME hits Earth, sparks G2 - Moderate geomagnetic storm

A coronal mass ejection (CME) produced by the July 14th M2.4 long-duration solar flare hit Earth's magnetic field at 06:01 UTC on July 16, 2017. G2 - Moderate geomagnetic storming started 9 hours later. The S1 Minor solar radiation storm that started at 09:00...

July 16, 2017

aurora forecast 19 30 utc july 9 2017

CH HSS sparks geomagnetic storms reaching G1 levels

Our planet is under the influence of a positive polarity CH HSS which is causing geomagnetic storms reaching G1 - Minor levels. During the past 24 hours, solar wind parameters reflected the onset of a co-rotating interactive region (CIR) followed by the influence of...

July 09, 2017

partial halo cme june 28 2017 lasco c2

Partial-halo CME impact sparks G1 geomagnetic storm

A partial-halo coronal mass ejection (CME) produced on June 28, 2017 hit Earth's magnetic field at 17:12 UTC on July 1, almost 24 hours earlier than expected. The impact was weak but managed to spark a G1 - Minor geomagnetic storm 17 hours later. G1 Watch...

July 02, 2017

aurora june 16 2017 by stan cholak

Recurrent CH HSS sparks G1 geomagnetic storming

Earth is under the influence of a recurrent, negative polarity coronal hole high speed stream (CH HSS) today which is causing G1 - Minor geomagnetic storming. Solar wind speed increased to 548 km/s at 08:08 UTC while total field reached a maximum of 16 nT at 07:16...

June 16, 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

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