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Spaceweather.

SOLAR WIND STORM: A stream of high-speed solar wind hit Earth during the late hours of Jan 18th, sparking a surprisingly strong G2-class geomagnetic storm. Wind speeds are currently approaching 700 km/s, some of the highest values of young Solar Cycle 25. High-latitude sky watchers should be alert for auroras mixed with moonlight on Jan. 19th.

SOLAR FLARE AND RADIO BLACKOUT: Sunspot AR2929 erupted on Jan. 18th (17:44 UTC) producing an M1.5-class solar flare.

During the flare, a pulse of X-rays ionized the top of Earth's atmosphere, causing a shortwave radio blackout over South America, Aviators, mariners, and ham radio operators in the area may have noticed unusual propagation effects at frequencies below 20 MHz.

The explosion also hurled a CME into space. We are still waiting for images from SOHO coronagraphs to determine if the storm cloud is heading for Earth?