G1 – Minor geomagnetic storm in progress

G1 – Minor geomagnetic storm in progress

A negative polarity, southern crown coronal hole extension has moved into a geoeffective position enhancing the solar wind environment. Unsettled levels are expected on April 21 as high speed stream (HSS) effects persist. By late April 22 (UTC), a positive polarity…

Negative polarity CH HSS sparks geomagnetic storming

Negative polarity CH HSS sparks geomagnetic storming

An isolated, negative polarity Coronal Hole High Speed Stream (CH HSS) is affecting our planet on February 27 and 28, 2019, causing isolated periods of geomagnetic storming. Solar winds over the past 24 hours were indicative of an anticipated Solar Sector Boundary…

Negative polarity CH HSS sparks G1 – Minor geomagnetic storming

Negative polarity CH HSS sparks G1 – Minor geomagnetic storming

A large negative polarity coronal hole is affecting our planet, causing G1 – Minor geomagnetic storming. Geomagnetic K-index of 5 (G1 – Minor geomagnetic storm) threshold was reached at 01:37 UTC, January 5, 2019. Solar wind parameters, as measured by the DSCOVR…

Positive polarity coronal hole high speed stream sparks geomagnetic storm

Positive polarity coronal hole high speed stream sparks geomagnetic storm

A positive polarity coronal hole high speed stream (CH HSS) is affecting our planet since late December 27, sparking G1 – Minor geomagnetic storm. Periods of active conditions are likely through December 29 followed by quiet to unsettled activity on December 30…

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,…

Spotless Sun, CH HSS sparks geomagnetic storms

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…

Positive polarity CH HSS sparks G1 geomagnetic storm

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…

Recurrent CH HSS causing geomagnetic storming on Earth

Recurrent CH HSS causing geomagnetic storming on Earth

Our planet is passing through a stream of fast-moving, negative polarity solar wind. Geomagnetic storming reached G1 – Minor levels at 17:24 UTC. A G2 – Moderate warning is in effect for the rest of the UTC day. This is a recurrent CH HSS, responsible for G3 -…

Southern pole connected CH HSS causes unsettled to major geomagnetic storms

Southern pole connected CH HSS causes unsettled to major geomagnetic storms

Southern pole connected coronal hole high speed stream (CH HSS) is causing unsettled to major (G2 – Moderate) geomagnetic storms since April 15, 2015.Geomagnetic K-index of 6 (G2 – Moderate) threshold was reached at 23:27 UTC on April 16, 2015.During the last 12 hours (