Geomagnetic storms

aurora from rice lake minnesota april 20 2018

G2 - Moderate geomagnetic storm in progress

A G2 - Moderate geomagnetic storm threshold was reached at 08:25 UTC on April 20, 2018 and G2 warning is in now in effect until 12:00 UTC. An interplanetary shock wave hit Earth's magnetic field around 23:50 UTC on April 19, Dr. Tony Phillips of SpaceWeather.com...

April 20, 2018

geoeffective np coronal hole march 13 2018

Negative polarity CH HSS sparks G2 - Moderate geomagnetic storm

A persistent negative polarity coronal hole high speed stream (CH HSS) sparked G2 - Moderate geomagnetic storm on March 18, 2018. A gradual return to background levels is expected on March 19 as CH HSS influence subsides. However, enhanced solar wind parameters are...

March 19, 2018

andrei enjoy the arctic february 26 2018

CH HSS sparks geomagnetic storm, G2 - Moderate warning

Geomagnetic storms caused by negative polarity, south polar coronal hole high speed stream (CH HSS) reached G1 - Minor levels early Tuesday, February 27, 2018. Solar wind parameters are expected to further increase today and a G2 - Moderate geomagnetic storm warning...

February 27, 2018

aurora model fcst 05 20 z february 18 2018

Negative polarity CH HSS sparks G1 - Minor geomagnetic storming

An isolated interval of G1 - Minor geomagnetic storm conditions was observed early February 19, 2018, due to the influence of negative polarity coronal hole high speed stream (CH HSS). Solar activity over the past 24 hours was at very low levels. Earth-facing side...

February 19, 2018

solar filament eruption december 15 2017

Filament eruption, spotless Sun, Total Solar Irradiance and cosmic radiation

A 13-degree long plasma filament eruption was observed in SDO/AIA 304 imagery starting at 12:29 UTC on December 15, 2017. A glancing blow is expected late December 19, in combination with a recurrent, positive polarity CH HSS. Meanwhile, solar activity is at very...

December 17, 2017

polar connected ch december 5 2017 f

Polar-connected, positive polarity CH HSS sparks geomagnetic storming

A high-speed solar wind stream is affecting our planet today, causing geomagnetic storming. G2 - Moderate geomagnetic storm watch is in effect. Solar wind parameters indicated the onset of a Co-Rotating Interaction Region (CIR) in advance of a polar-connected,...

December 05, 2017

coronal hole november 19 2017

CIR ahead of CH HSS sparks G1 - Minor geomagnetic storming

A Co-Rotating Interaction Region (CIR) ahead of isolated positive polarity Coronal Hole High Speed Stream (CH HSS) is affecting our planet today, causing geomagnetic storming. G1 - Minor geomagnetic storm threshold was reached 05:30 UTC. Over the past 24 hours,...

November 21, 2017

aurora forecast 21 05z november 7 2017

Geomagnetic storms reaching G2 - Moderate levels, spotless Sun

Earth is again under the influence of a recurrent, positive polarity, northern extension Coronal Hole High Speed Stream (CH HSS). G1 - Minor geomagnetic storm level threshold was reached at 11:55 UTC, followed by G2 - Moderate at 19:21 UTC. Over the past 24 hours,...

November 07, 2017

aurora october 23 2017 by markus varik norway

Recurrent, positive polarity CH HSS sparks geomagnetic storming

Our planet is again under the influence of a recurring, positive polarity Coronal Hole High Speed Stream (CH HSS), which is causing isolated periods of G1 - Minor geomagnetic storming. Over the past 24 hours, solar wind parameters were indicative of the arrival of a...

October 25, 2017

aurora forecast 16 06 utc october 13 2017

Geomagnetic storming reaches G2 - Moderate levels

Our planet is under the influence of coronal hole high speed stream (CH HSS) for the third day in a row. The geomagnetic field was unstable, with isolated periods of G1 - Minor storm levels during the past two days and then increased to G2 - Moderate levels at 14:59...

October 13, 2017

aurora jun wang october 11 2017

Spotless Sun, CH HSS sparks geomagnetic storms

Geomagnetic storming reaching G1 - Minor levels is underway as our planet moves through a stream of high-speed solar wind. At the same time, solar activity is at very low levels with no flare activity and a spotless Sun on its Earth-facing side. Over the past 24...

October 12, 2017

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 forecast 20 55 utc september 27 2017

CH HSS sparks G2 - Moderate geomagnetic storming

A stream of high-speed solar wind coming from a recurrent, polar-connected, positive-polarity coronal hole is affecting our planet today and causing geomagnetic storming. G1 - Minor geomagnetic storm levels were reached at 08:48 UTC and increased to G2 - Moderate...

September 27, 2017

aurora forecast at 16 56 utc september 14 2017

G2 - Moderate geomagnetic storm in progress

Our planet is under the influence of a positive polarity coronal hole high speed stream (CH HSS) which is causing isolated periods of G2 - Moderate geomagnetic storming. Geomagnetic K-index of 5 (G1 - Minor) geomagnetic storm threshold was reached at 15:43 UTC. G2 -...

September 14, 2017

x8 2 solar flare september 10 2017

Glancing blow expected from CME produced by major X8.2 solar flare

A major X8.2 solar flare that erupted at 16:06 UTC on September 10, 2017 from Region 2673, produced a powerful asymmetric full halo Coronal Mass Ejection (CME) and it appears one part of it is heading toward Earth. A glancing blow is expected late on September 13....

September 11, 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

wsa enlil cme model

Shock arrival from September 4 Coronal Mass Ejection

The coronal mass ejection (CME) produced by the M5.5 solar flare on September 4, 2017 arrived at the DSCOVR spacecraft on September 6 at 23:08 UTC and at Earth 30 minutes later. The impact did not spark a geomagnetic storm, but the potential still exists as the CME...

September 07, 2017