The RSGB Contest Committee has announced an Eclipse QSO Party, in cooperation with the Propagation Studies Committee, during the partial eclipse on March 20. According to the RSGB, the event is not a contest, but some RSGB Contest Committee software and web facilities will be used to collect and display activity reports.
“The D layer of the ionosphere may not be as strong due to the eclipse, and stations on the lower bands — 1.8 MHz, 3.5 MHz, and perhaps 7 MHz — may be heard that would otherwise be inaudible during the day,” the announcement said.
The RSGB invited “all available radio amateurs” to participate, citing “an opportunity to contribute to our knowledge of propagation and the ionosphere.” Shortwave listeners with wide-band receivers may take part and can submit reports to the Contest Committee.
There’s more information on the RSGB eclipse experiments on the RSGB website.