[IRCA] (This Is Not A Test) NZ4O MF Radiowave Propagation Forecast #2012-18

["Thomas F. Giella" <thomasfgiella@xxxxxxxxxxxxxxx>]

NZ4O MEDIUM FREQUENCY RADIOWAVE PROPAGATION FORECAST #2012-18
“A Radiowave Propagation Forecast For Hams As Well As Shortwave DXers And 
Listeners”



Published on Friday April 27, 2012 at 0000 UTC

Valid 0000 UTC Saturday April 28, 2012 through 2359 UTC Friday May 04, 2012



Medium frequency (300-3000 kc) radiowave propagation conditions are impacted 
in a negative manner not by variations in the maximum usable frequency (MUF) 
along a particular propagation path and time but rather due to geomagnetic 
disturbances (Kp-3-4) and geomagnetic storms (Kp-5 & >) that increase signal 
absorption via the E layer (the general altitude of the radio aurora). Also 
increases in the lowest usable frequency (LUF) via D layer signal absorption 
due to elevated background solar flux levels (>A0), proton flux levels at 
energies greater than 10 MeV (10+0) and galactic cosmic rays. For more 
information on MF radiowave propagation theory check out 
http://www.wcflunatall.com/nz4o5.htm .



GLOBAL MEDIUM FREQUENCY (300-3000 KC) PROPAGATION CONDITIONS EXPECTED WITH 
AN EMPHASIS ON 600 METERS, THE MF AM BROADCAST BAND AND 160 METERS-

Note! This forecast is based upon quiet solar, space and geomagnetic weather 
conditions. Geomagnetic storming Kp-5> and energetic proton storms >10 MeV 
(10+0) can at times render the forecast temporarily inaccurate.

Magnetic Equator-

Low 0-25 degrees

Mid 25-60 degrees

High 60-90 degrees



NORTHERN HEMISPHERE-

-East <-> West To 1100 Mi /1800 km- Fair

*North <-> South To 1100 Mi /1800 km- Fair

+South <-> North To 1100 Mi /1800 km- Fair


SOUTHERN HEMISPHERE-
-East <-> West To 1100 Mi / 1800 km- Fair To Good

*South <-> North To 1100 Mi /1800 km- Fair To Good

+North <-> South To 1100 Mi / 1800 km- Fair To Good



Northern Hemisphere (TA) Trans Atlantic, (TI) Trans Indian, (TP) Trans 
Pacific and cross Equatorial propagation conditions in

excess of approximately 3200 mi / 5200 km



High Latitude- Poor To Fair

Mid Latitude- Fair

Low Latitude- Poor To Fair



Southern Hemisphere (TA) Trans Atlantic, (TI) Trans Indian, (TP) Trans 
Pacific and cross Equatorial propagation conditions in

excess of approximately 3200 mi / 5200 km



High Latitude- Fair

Mid Latitude- Fair To Good

Low Latitude- Fair



HF Propagation Forecast Scale-
Excellent S9+1 Or Better
Good S7-S9
Fair S4-S6
Poor S1-S3
None S0


Note! I use error prone RAW public domain data from the NOAA Space 
Environment Center, as well as other U.S. government organizations, to 
produce my propagation forecasts. This data is gathered and made public by 
the U.S. Government using taxpayer $$$. However the propagation forecast 
that I produce from the RAW public domain data is my personal intellectual 
property. Therefore this propagation forecast contained herein is 
copyrighted © 1988-2012 by Thomas F. Giella, NZ4O. Reproduction of and 
distribution of the propagation forecast herein is allowed without advanced 
permission as long as proper credit is given.

Also space weather forecasting is still an inexact science. The forecasts 
are not official but for hobby related purposes only and are subject to 
human error and acts of God, therefore no guarantee or warranty implied.

73 & GUD DX,
Thomas F. Giella, NZ4O
Lakeland, FL, USA
thomasfgiella@xxxxxxxxxxxxxxx



NZ4O MF/HF/6M (600-6 Meters) Radiowave Propagation Forecast: 
http://www.solarcycle24.org
NZ4O Solar Space Weather & Geomagnetic Data Archive: 
http://www.wcflunatall.com/nz4o1.htm
NZ4O Solar Space Weather & Geomagnetic Data Dashboard: 
http://www.wcflunatall.com/nz4o2.htm
NZ4O Solar Cycle 24 Forecast Discussion & Archive: 
http://www.wcflunatall.com/nz4o4.htm
NZ4O 160 Meter (MF) Radio Propagation Theory Notes: 
http://www.wcflunatall.com/nz4o5.htm
NZ4O Solar Space Weather & Geomagnetic Raw Forecast Data Links: 
http://www.wcflunatall.com/nz4o6.htm




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