Check 6765 USB and 6910 USB as well. They should be active with their weekly nets at the same time (now) that 6845 kHz USB is active. You'll often be able to hear the same station "move around" as they check into each net.
Net control station working NNX3YT in West Virginia at 1631 UTC, check out at 1700 UTC. Several other stations checking into net, giving signal reports with "in" and "out" times. Good copy on net control and stations checking in.