Active Region 2371, now classifiead as Beta-Gamma-Delta and located near the center of the disk, erupted with two M-class solar flares - M2.0 and M2.7 - early on June 21, 2015 producing Earth-directed full-halo Coronal Mass Ejection (CME). Arrival is expected on June 23/24.
A Type II and IV radio emission (starting at 02:24 UTC, estimated velocity 682 km/s) were associated with the event. Type IV emissions occur in association with major eruptions on the Sun and are typically associated with strong CMEs and solar radiation storms.
Additionally, two 10cm radio bursts were registered. A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.
