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


The first science results from the 21 August 2017 Solar Eclipse QSO Party have been published in the American Geophysical Union journal Geophysical Research LettersIn the paper, "Modeling Amateur Radio Soundings of the Ionospheric Response to the 2017 Great American Eclipse," Nathaniel Frissell, W2NAF, and team present Reverse Beacon Network (RBN) observations of the SEQP and compare them with raytracings through an eclipsed version of the physics-based ionospheric model SAMI3. On  14 MHz (20 m), eclipse effects were observed as a drop-off in communications for an hour before and after eclipse maximum. On 7 MHz (40 m), typical path lengths extended from about 500 km to 1000 km for 45 minutes before and after eclipse maximum. On 1.8 MHz (160 m) and 3.5 MHz (80 m), eclipse effects were observed as band openings 20 to 45 minutes around eclipse maximum.

UPDATE: Booth talk scheduled update 8 May 2018.

HamSCI will again be at the Dayton Hamvention, this year as part of the new Ham Radio 2.0: Innovation and Discovery area sponsored by the Yasme Foundation. Come visit the HamSCI Booth and Forum to learn about projects on the cutting of ham radio science and engineering research, including initial science results of the Solar Eclipse QSO Party (SEQP), the status of the Arecibo Observatory, the latest in understanding the causes of 6 meter sporadic E propagation, and how an inexpensive software defined radar for ionospheric studies works. Hamvention will be held May 18-20, 2018 at the Greene County Fairgrounds in Xenia, Ohio.

The 2018 HamSCI Workshop held at the New Jersey Institute of Technology (NJIT) February 23-24, 2018 brought together hams and space scientists from across the United States, Canada, and Great Britain. With over 60 people in attendance, presentations included results from the 2017 Great American Eclipse, ideas for a personal space weather station, and other amateur radio-space science experiments and projects.