Solar X-rays: Solar Xray Status
Geomagnetic Field: Geomagnetic Field Status

dhs threat level

Geophysical Alert Message wwv.txt

Mon, 10/27/2014 - 11:00pm
Broadcast via WWV and WWVH at 18 and 45 minutes past the hour. This message is updated every 3 hours. Reports current Solar-terrestrial indinces, Solar Flux, A-index, K-Index, forecast for space weather storms. Prepared by the US Dept. of Commerce, NOAA, Space Environment Center

WM5R Long Delayed Echoes

Sun, 10/26/2014 - 11:00pm
WM5R presentation of Introduction to Long-delaye echoes and theories among this propagation effect.

HF Radio Propagation Theory

Sun, 10/26/2014 - 11:00pm
Ionospheric HF Radio Propagation Theory in a Nutshell by Rick Johnson, AE3C

Ionospheric T Index

Sun, 10/26/2014 - 11:00pm
T index explained BY NOAA

Sunspots explained

Sun, 10/26/2014 - 11:00pm
History, activity, glossary and modern reseach about suspots

NOAA Dailiy Reports

Sun, 10/26/2014 - 11:00pm
Report of solar & geophysical activity

VOACAP Online

Sun, 10/26/2014 - 11:00pm
Online professional-grade high-frequency (3-30 MHz) propagation predictions

An introduction to HF Propagation

Sun, 10/26/2014 - 11:00pm
This article will help to unravel some of the mysteries as well as giving useful operating tips to maximize your chances of working that rare station by G4UCJ

Propagation and the Atmosphere

Sun, 10/26/2014 - 11:00pm
overview of radio signals and radiowave propagation and how different areas of the atmosphere affect radio communications.

Cloud RF - Web VHF/UHF planning

Sat, 10/25/2014 - 11:00pm
Web based VHF-UHF RF planning powered by SPLAT! and Google Maps. Access via website, Android App or dynamic Google Earth interface.

Mistery of LDE explained

Sat, 10/25/2014 - 11:00pm
The Five Most Likely Explanations for Long Delayed Echoes

Understanding Solar Indices

Sat, 10/25/2014 - 11:00pm
Solar Flux, Geomagnetic Activity indexes and interpreting their relation

Check DX Propagation with Beacons

Sat, 10/25/2014 - 11:00pm
W0RW article that guide you to using beacons to determine dead bands or upcoming propagation openings.

Ground Wave Signal Propagation

Fri, 10/24/2014 - 11:00pm
Article on propagation basics. The ground wave used for radio communications signal propagation on the long, and medium wave bands for local radio communications

HF Propagation Primer

Fri, 10/24/2014 - 11:00pm
Flash Movie describing HF (shortwave) radio propagation to beginners. Very helpful aid in understanding.

Greyline propagation

Fri, 10/24/2014 - 11:00pm
About greyline propagation in HF bands

Radio Signal Propagation

Fri, 10/24/2014 - 11:00pm
Concise guides to radio signal propagation including topics such as the ionosphere, troposhere, ionospheric refraction, E layer, D, layer etc.

Amateur Radio Propagation RSS (XML) Live Feed

Fri, 10/24/2014 - 11:00pm
Live space weather and propagation data, in RSS (XML) format.

IPS - HF Systems MUF maps and prediction charts

Fri, 10/24/2014 - 11:00pm
These pages provide general propagation advice for HF communicators. Information available includes inferred global propagation conditions, real time HF fadeout coverage charts, regional ionospheric vertical MUF maps and Hourly Area Prediction charts for Astralia and Asia, Europe and North America

Current Optimal Frequency Charts

Fri, 10/24/2014 - 11:00pm
Optimal Working Frequencies (MHz) for High Frequency (HF) / Shortwave Radio. By region, updated monthy.