Geomagnetic Storm Watch. Minor G1-class geomagnetic storms are possible today, March 6th, when a high-speed stream of solar wind is expected to reach Earth. NASA's STEREO-A spacecraft has sampled this stream and found wind speeds exceeding 600 km/s. High-latitude sky watchers should be alert for auroras. The incoming solar wind stream is pouring out of a hole in the sun's atmosphere. The stream now heading for Earth appears to be filled with "negative polarity" magnetic fields. Such fields can easily link to Earth's magnetic field opening a crack in our planet's defenses against solar wind. As a result, this solar wind stream could be effective at sparking auroras. https://spaceweather.com/ https://www.swpc.noaa.gov/ Stay Tuned!