Latest solar radio flux report from DRAO, Penticton

Transmission of the solar radio flux report is temporarily halted.

The daily flux values are being updated on weekdays and are available here.

Flux Density Values in sfu for 2022-08-18 at 23:00
Julian Day Number2459810.447
Carrington Rotation Number2261.037
Observed Flux Density117.4
Flux Density Adjusted for 1 A.U.120.3
URSI Series D Flux, Adj. x 0.9108.2

This measurement has been derived, processed and transmitted automatically. In case of questions, please contact us as below:

Staff are available at the Observatory between 16:30 and 01:00 UT. The Observatory is normally unmanned on weekends and holidays.

The Solar Radio Monitoring Program
is operated jointly by the
National Research Council Canada
and Natural Resources Canada
with support from the Canadian Space Agency

For more information about the National Research Council Canada and the Herzberg Institute of Astrophysics, (Dominion Radio Astrophysical Observatory) please see us at For information about the Canadian Space Agency please visit

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