Time profiles for X-ray, EUV flux, and time variations of dfmin on May 13, 2013. Panel a shows X-ray flux in 0.1–0.8 nm observed using GOES/XRS; panels b and c show EUV flux in 26–34 nm and 11–14 nm, respectively, observed using SDO/EVE; panel d shows Lyman-α flux observed using GOES/EUVS-E; panel e shows dfmin values. The lack of dfmin values in Okinawa at 2:15 UT indicates that the blackout occurred during this time.