G4 (Severe) Storm Watch for 10-11 October

A fast coronal mass ejection (CME) erupted from the Sun the evening of 8 October, 2024, and is likely to arrive at Earth on 10 October. This CME has been analyzed and speed estimates are 1200 to 1300 km/s. This makes for a potential arrival time as early as the morning to midday of 10 October EDT. There is potential to reach G4 (Severe) upon arrival of this CME and throughout its passage. We won't know the characteristics of the CME until it arrives 1 million miles from Earth and its speed and magnetic intensity are measured by the DSCOVR and ACE satellites. Please visit our webpage for the latest information and updates.