I was scanning through the beacon subband on 10 meters last night at 9:30pm local time and heard K6FRC/B coming through at about an S2 here in Central Montana about 900 miles as the crow flies. Then other beacons started popping up in oregon and Northern Cal as well. So tuned to the phone portion and heard no one on except one local Portland Oregon group (800 miles) chatting away. Heard one of them peak to S3 with quick QSB mostly around S0 to S1. The band was definitely open (marginally) to the west coast but nobody on really at all. I always monitor the beacons because unexpected openings is part of the excitement of 10M, although no one seems to pay much attention to it anymore. Anyways very unusual band opening. I never hear stations in Oregon from here during regular F layer propagation. It definitely was not ground wave or Spoardic E (at least I don't think so). My thoughts are Inversion, or some type of Scatter.