
SBC or CIR (Source: Solar-Terrestrial Centre of Excellence (STCE), STCE is a collaborative network of the Belgian Institute for Space Aeronomy, the Royal Observatory of Belgium and the Royal Meteorological Institute of Belgium, providing fundamental research of Spaceweather and its effects on Earth.
Co-Rotating Solar Winds Headed Our Way
SPACEWEATHER.COM NEWS: 08/17/2025
CO-ROTATING INTERACTION REGION: A co-rotating interaction region (CIR) is expected to hit Earth on Aug. 18th, squeezing our magnetic field between fast and slow streams of solar wind. Watch for a sudden jump in solar wind speed, density, and magnetic field (especially Bz). Minor G1-class geomagnetic storms and high-latitude auroras are possible if Bz turns south.

