TavaOne//Solar

Live · Updated every 15 min

Solar Conditions

Real-time solar flux, geomagnetic indices, and band propagation — built for amateur radio operators.

Live Conditions

Current solar data

Solar flux index, geomagnetic conditions, and X-ray flux — refreshed every 15 minutes from NOAA SWPC.

Solar Flux (SFI)
10.7 cm radio flux
A-Index
Geomagnetic Ap (3-hr)
K-Index
Planetary Kp (real-time)
X-Ray Class
GOES satellite

Derived from Live Data

HF band conditions

Loading conditions…

Simulated time: Now
−12 hnow+12 h

Estimated from SFI and Kp · real conditions vary by path, antenna, and solar terminator

Solar Terminator

Greyline map

The greyline is the twilight boundary between day and night. The 30-minute window around it — when the ionosphere is in transition — often produces outstanding long-path propagation on 40 m and 80 m.

·

Equirectangular projection · terminator updates every minute · yellow dot = subsolar point · dashed lines = tropics

NASA / ESA Live Imagery

The sun right now

Live solar imagery from NASA's Solar Dynamics Observatory and the ESA/NASA SOHO spacecraft — updated every few minutes.

SDO AIA 193 Å coronal plasma
SDO AIA 193 Å · Hot coronal plasma at ~1.5 MK. Bright regions are active areas — flare-prone loops and spots that drive X-ray bursts.
SDO HMI white-light sunspot map
SDO HMI Continuum · White-light sunspot map. Dark umbral regions indicate strong magnetic flux — more spots correlate directly with higher SFI.
SOHO LASCO C3 coronagraph
SOHO LASCO C3 · Coronagraph — white disk occludes the sun. Bright expanding halos are coronal mass ejections (CMEs) that may reach Earth in 1–3 days.

NASA SDO (sdo.gsfc.nasa.gov) · ESA/NASA SOHO (soho.nascom.nasa.gov) · Images delayed ~15–60 min from real-time

24-Hour History

Solar trend

Solar Flux Index (SFI)
loading…
now
K-Index (Kp)
loading…
now

Ham Radio Impact

What the numbers mean for your radio

Loading current conditions…

📻

HF Propagation

Loading…

🌍

Geomagnetic Activity

Loading…

☀️

Solar Events

Loading…

Education

Why does any of this matter?

Solar activity directly shapes the ionosphere — and the ionosphere controls which amateur radio bands are open and how far your contacts can reach. Once you understand the connection, you'll know exactly when to call CQ.