ATel 17998: Intense solar activity near the limbs: monitoring AR4513

After two weeks with the X-ray background down at the B2-B3 level, the solar activity returned to near X-class conditions on 20 August 2026. The renewed activity is primarily associated with the active region AR 4513 at the eastern limb, which produced M2-, M8-, and M3-class flares, followed by additional C-class events on 21 August. ...