Free HF conditions widget
Live solar numbers and band activity for your club site, QRZ page or forum signature. Updates every 10 minutes.
Make it local
Show what stations in your area are hearing. Enter a ZIP code, city or grid square.
Showing worldwide activity.
Card (360 × 200)
For club websites and QRZ pages.
Banner (468 × 90)
For page headers, sidebars and forum signatures.
What it shows
SFI, Kp, X-ray and solar wind come straight from NOAA's Space Weather Prediction Center. Kp turns yellow at 4 and red at 5 and up.
The bars count how many different stations were heard on each band in the last 15 minutes (or, on a local widget, heard by receivers within 500 km of your grid square, widening automatically where there are few receivers), from live PSK Reporter spots. Taller bars mean more stations are getting through right now. It's a measurement, not a forecast, and it leans toward digital modes like FT8, since that's what PSK Reporter collects.
For the full picture (band-by-band history, the solar cycle and more), see Solar & HF conditions.
Using it
Free for club sites, personal pages, QRZ bios, forums and newsletters. Please keep the link to 73QRZ. On QRZ.com, paste the HTML code into your biography's HTML (source) view.
The image refreshes about every 10 minutes. Some forums keep their own copy of images, so it may update less often there.
Building an app or dashboard? The same numbers are at 73qrz.com/widget/hf.json. Free to use; please show “HF conditions from 73QRZ.com” with a link.