Positive polarity CH HSS sparks geomagnetic storm

Earth is under continued influence of a positive polarity coronal hole high speed stream (CH HSS),…

Spotless Sun heralds Solar Minimum after CME producing Region 2567 departs

After Active Region 2567, the source of 7 M-class and numerous C-class solar flares between July…

3 strong M-class solar flares erupt from Region 2567, CME produced

Three strong solar flares erupted from Active Region 2567 early on July 23, 2016 - M5.0,…

Two M1 solar flares, flurry of C-class erupt from geoeffective Region 2567

After more than 3 months without any significant solar flare, our sun produced two consecutive M-class…

Geomagnetic storm in progress

A geomagnetic storm reaching G1 - Minor levels is currently in progress following the early arrival…

Faint, asymmetric halo CME combined with CH HSS to hit Earth’s magnetic field on July 21

Although solar activity was at low levels on July 17, 2016, geoeffective Active Region 2567 ('beta-gamma')…

Negative polarity CH HSS drives isolated periods of geomagnetic storming

Solar wind parameters reflected a brief enhancement associated with the arrival of a co-rotating interaction region…

Geoeffective coronal hole, geomagnetic storm in progress

A co-rotating interaction region (CIR) - the transition zone between slow- and fast-moving streams of solar…

Recurrent CH HSS causing geomagnetic storms

A recurrent, negative polarity coronal hole high speed stream (CH HSS) has hit Earth's magnetic field…

Strong geomagnetic storms in progress

A G3 - Strong geomagnetic storm conditions were observed beginning 05:59 UTC on May 8, 2016.…