2017 Total Solar Eclipse

Map of US Eclipses from 2017-2052

On 21 August 2017, a total solar eclipse will cause the shadow of the moon to traverse the United States from Oregon to South Carolina in just over 90 minutes. Although the ionospheric effects of solar eclipses have been studied for over 50 years, many unanswered questions remain. HamSCI is inviting amateur radio operators to participate in a large-scale experiment which will characterize the ionospheric response to the total solar eclipse and target open science questions.

Would you like to participate? Help out by getting on the air with the Solar Eclipse QSO Party, a contest-like operating event designed to generate data for studying the eclipse! Other ways to get involved include making HF Frequency Measurements, recording HF spectra, setting up a Reverse Beacon Network Receiver, particpating in VLF/LF receiving experiements, and listening to AM broadcast stations. See our Eclipse Get Involved for more information.

Are you curious about how prior total solar eclipses affected the ionosphere? Read about radio experiements during the 1999 United Kingdom Total Solar Eclipse coordinated by the Rutherford Appleton Laboratory.



Get on the air with the Solar Eclipse QSO Party!

Get Involved!

How can hams and the general public get involved?

The Experiment

Details of the plan to study the 2017 solar eclipse.


Join the HamSCI-Eclipse Mailing List


After eight short hours, the Solar Eclipse QSO Party has come to a close. Particpation was quite good. Although the final numbers are not yet in, preliminary reports show that over 670,000 spots were detected by the RBN, and over 542,000 spots were reported to PSKReporter during the SEQP. These numbers will increase as data is processed. SEQP participants are requested to submit their logs to hamsci.org/seqp. A PDF Certificate of Participation will be provided on log submission.

In just a few short hours both the Great American Eclipse and the SEQP will begin. Over 1300 stations have pre-registered, so activity levels are expected to be high. After a geomagnetically unsettled weekend, the solar activity appears to have calmed down. NOAA SWPC predicts this situation to continue today, with less than 1% chance of a major radio blackout, less than 1% chance of an S1 or greater Solar Radiation Storm, and no geomagnetic storm impacts. As such, propagation conditions should be good for HF radio operations.

With only 5 days remaining before the Solar Eclipse QSO Party (SEQP), over 600 stations have already indicated that they are planning on participating. We have posted both a list and map showing the locations of all pre-registered stations. Stations are still encouraged to pre-register. Many stations have e-mailed asking for guidance as to what is the best band, mode, or antenna to use is. We recommend simply following the SEQP rules and enjoying this as you would any other operating event. We will be getting data from many, many different sources and need signals on all bands and modes. A link for log submission will be posted to hamsci.org/seqp by the end of the SEQP. See you on the air and good luck in the SEQP!