There are two SECC club circles. One for ARRL contests and the other for CQ contests. You can go to https://contest-clubs.arrl.org/griddistancecalc.php to determine if you are inside the club circle. The SECC club circle center is located at EM83hh. If you aren’t inside either circle you are still welcomed to join our Groups.io mailing list group to follow what’s going on in the SECC.
The inner circle on this map is the SECC club circle for ARRL contests which is defined to be 175 miles from the center.
The outer circle on this map is the SECC club circle for CQ contests which is defined to be 250 miles from the center.
Click here to display a map that can zoom in and out on to determine if your QTH is inside the SECC club circle.