They also call Sporadic ¨E¨ propagation ´Short Skip´, for 24MHz and lower VHF Low band, like 450 miles to about 600 miles, where as F2 is usually +800 miles. Once in a while, an ¨E¨ cloud can do Back Scatter, a make an even closer contact, like 100 - 250 miles, possible. But yeah... The CB CH6 ´Superbowl´ is a good place to hang for openings. I like to keep a rig on CH 38LSB. Another thing that I can hear this time of year is a quick burst of Meteor Scatter. Happy DX´ing!!!