CIR/CH HSS impact produces G2 – Moderate geomagnetic storming
Image credit: NASA/SDO
Co-rotating interaction region (CIR) followed by negative polarity coronal hole high speed stream (CH HSS) produced G1 – Minor and G2 – Moderate geomagnetic storming on Earth on June 15 and 16, 2023.
Co-rotating interaction region is a compressed solar-wind plasma and magnetic-field region, forming due to the interaction of ambient (slow) solar wind and a high speed stream emanating from a coronal hole on the Sun.
CIR impacted our planet on June 15 and was closely followed by negative polarity CH HSS, producing G1 – Minor and G2 – Moderate geomagnetic storm levels late June 15 and into June 16 (UTC).
An enhanced solar wind environment is expected to continue through June 16 and 17 as the CH HSS settles into a geoeffective position. Enhancements are expected to wane by June 18.
➭ For near real-time space weather information, data, and images, visit SWX.
Teo Blašković founded The Watchers in 2011 and edited it until 2026, covering seismic and volcanic activity, extreme weather, space weather and near-Earth objects. Articles on this page are his archive.
Published in the last 24 hours
- In September 1859, a solar storm lit up the night sky so brightly that gold miners in the Rocky Mountains woke up after midnight and started cooking breakfast, convinced the aurora glowing over their camp was the sunrise Epicenter
- A patch of warm Pacific water that could become the strongest El Niño in more than 70 years sits thousands of miles from any American town, yet it is already the main reason NOAA expects a wetter winter across the South and a milder one across the North
- A 19-year-old Nebraska teacher reportedly tied her pupils together with twine and led them to safety through a blizzard in January 1888 Epicenter
