G2 – Moderate geomagnetic storm in progress

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…

Negative polarity CH HSS sparks G2 – Moderate geomagnetic storm

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…

CH HSS sparks geomagnetic storm, G2 – Moderate warning

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…

Negative polarity CH HSS sparks G1 – Minor geomagnetic storming

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…

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

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…

Polar-connected, positive polarity CH HSS sparks geomagnetic storming

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,…

CIR ahead of CH HSS sparks G1 – Minor geomagnetic storming

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,…

Geomagnetic storms reaching G2 – Moderate levels, spotless Sun

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,…

Recurrent, positive polarity CH HSS sparks geomagnetic storming

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…

Geomagnetic storming reaches G2 – Moderate levels

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…