At 1955Z, 4-XI-2003, an X17.4-class flare peaked from region 486. This is one of the most powerful flares recorded. The flare has caused extensive radio blackout conditions on most of the HF radio spectrum. A type II Radio Emission began at 1942Z with an estimated velocity of 1268 km/s, indicating a possible partial halo CME. More (live) info at http://prop.hfradio.org/