2017 Total Solar Eclipse

Map of US Eclipses from 2017-2052

On 21 August 2017, a total solar eclipse caused 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 invited amateur radio operators to participate in a large-scale experiment which characterized the ionospheric response to the total solar eclipse and targeted open science questions.

Hundreds of ham radio operators helped 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 HamSCI experiments included 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


The United States National Science Foundation (NSF) has recognized the need to join the amateur radio and professional science communities through a recent grant award to support the upcoming HamSCI Workshop from March 22-23, 2019 in Cleveland, OH. The conference is hosted by the Case Western Reserve University Amateur Radio Club and organized and administered by the New Jersey Institute of Technology (NJIT). The NSF conference grant from the Geosciences Directorate will provide important facilitation for conference activities and associated logistics.

Registration is now open for the 2019 HamSCI Workshop to be held at Case Western Reserve University, W8EDU, in Cleveland, OH from March 22- 23, 2019. This year’s theme will be “Ionospheric Effects and Sensing,” which includes the use of amateur radio techniques for the characterization and study of ionospheric phenomena such as traveling ionospheric disturbances, sporadic E, response to solar flares, geomagnetic storms, the 2024 total solar eclipse other space weather events. In order to facilitate this science, continued development of the HamSCI Personal Space Weather Station and discussion of integration of amateur radio into the collegiate curriculum will also take place. Featured speakers include well-known amateur radio author Ward Silver, N0AX, propagation specialist Carl Luetzelschwab, K9LA, and MIT Haystack Observatory Research Scientist Dr. Larisa Goncharenko. Participants are invited to submit abstracts and present. Please visit http://hamsci.org/hamsci2019 for registration and abstract submission. This workshop is hosted by Case Western Reserve University in collaboration with New Jersey Institute of Technology.

Cover of January/February 2019 National Contest Journal

The Solar Eclipse QSO Party Wrap-Up is published as the feature article in ARRL's National Contest Journal this month. The article recaps the August 21, 2017 SEQP event, science results, and recognizes the top-scoring participants and RBN nodes. A free copy of the article is available through the NCJ web site.