S4 (Severe) Solar Radiation Storm in Progress swpc.noaa.gov 12 points by uticus 10 days ago · 2 comments Reader PiP Save lgats 10 days ago https://www.ieso.ca/Sector-Participants/RSS-Feeds/Day-0-Advi...https://www.misoenergy.org/markets-and-operations/notificati...https://www.ercot.com/services/comm/mkt_notices/noticeshttps://emergencyprocedures.pjm.com/ep/pages/dashboard.jsf uticusOP 10 days ago > This significant level has not been observed since October, 2003.