lunedì 24 aprile 2017
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The K7RA Solar Update

This just in from the Australian Space Forecast Centre at 2349 UTC on April 20, 2017: Recurrent coronal hole is expected to be geoeffective.INCREASED GEOMAGNETIC ACTIVITY EXPECTEDDUE TO CORONAL HOLE HIGH SPEED WIND STREAMFOR 23 APRIL 2017GEOMAGNETIC ACTIVITY FORECAST23 Apr:  Active to Minor StormSpaceweather.com reported old sunspot AR2644 returned after a 2-week trip around the Sun, and exploded on April ... Continua a leggere »

W4HM Daily HF Radio Wave Propagation Forecast #97

For my fellow RTTY contesters, this weekend’s HF radio wave propagation looks pretty bad. No surprise there. For my hamateur radio and SWL friends around the globe: Feel free without advanced permission to redistribute this “not for profit” solar, space and geomagnetic weather observation, discussion and HF radio wave propagation forecast, as long as you redistribute it in its entirety ... Continua a leggere »

W4HM Daily HF Radio Wave Propagation Forecast #96

For my hamateur radio and SWL friends around the globe: Feel free without advanced permission to redistribute this “not for profit” solar, space and geomagnetic weather observation, discussion and HF radio wave propagation forecast, as long as you redistribute it in its entirety and give me credit for it. Supporting images associated with my daily solar, space & geomagnetic weather ... Continua a leggere »

W4HM Daily HF Radio Wave Propagation Forecast #95

For my hamateur radio and SWL friends around the globe: Feel free without advanced permission to redistribute this “not for profit” solar, space and geomagnetic weather observation, discussion and HF radio wave propagation forecast, as long as you redistribute it in its entirety and give me credit for it. Supporting images associated with my daily solar, space & geomagnetic weather ... Continua a leggere »

Weekly Forecasts Bulletin

Solar activity forecast for the period April 21 – April 27, 2017 Activity level: mostly very low to low X-ray background flux (1.0-8.0 A): in the range A5.0-B3.0 Radio flux (10.7 cm): a fluctuation in the range 60-105 f.u. Events: class C (0-5/day), class M (0-3/period), class X (0/period), proton (0/period) Relative sunspot number (Ri): in the range 11-95 Tomas ... Continua a leggere »

W4HM Daily HF Radio Wave Propagation Forecast #94

For my hamateur radio and SWL friends around the globe: Feel free without advanced permission to redistribute this “not for profit” solar, space and geomagnetic weather observation, discussion and HF radio wave propagation forecast, as long as you redistribute it in its entirety and give me credit for it. Supporting images associated with my daily solar, space & geomagnetic weather ... Continua a leggere »

Propagation outlook from Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2017 Apr 17 0204 UTC # Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # Product description and SWPC contact on the Web # http://www.swpc.noaa.gov/weekly.html # #                Weekly Highlights and Forecasts # Highlights of Solar and Geomagnetic Activity 10 – 16 April 2017 Solar activity was at very low levels ... Continua a leggere »

W4HM Daily HF Radio Wave Propagation Forecast #93

For my hamateur radio and SWL friends around the globe: Feel free without advanced permission to redistribute this “not for profit” solar, space and geomagnetic weather observation, discussion and HF radio wave propagation forecast, as long as you redistribute it in its entirety and give me credit for it. Supporting images associated with my daily solar, space & geomagnetic weather ... Continua a leggere »

W4HM Daily HF Radio Wave Propagation Forecast #92

For my hamateur radio and SWL friends around the globe: Feel free without advanced permission to redistribute this “not for profit” solar, space and geomagnetic weather observation, discussion and HF radio wave propagation forecast, as long as you redistribute it in its entirety and give me credit for it. Supporting images associated with my daily solar, space & geomagnetic weather ... Continua a leggere »

W4HM Daily HF Radio Wave Propagation Forecast #91

For my hamateur radio and SWL friends around the globe: Feel free without advanced permission to redistribute this “not for profit” solar, space and geomagnetic weather observation, discussion and HF radio wave propagation forecast, as long as you redistribute it in its entirety and give me credit for it. Supporting images associated with this daily HF radio wave propagation forecast ... Continua a leggere »

W4HM Daily HF Radio Wave Propagation Forecast #90

For my hamateur radio and SWL friends around the globe: Feel free without advanced permission to redistribute this “not for profit” solar, space and geomagnetic weather observation, discussion and HF radio wave propagation forecast, as long as you redistribute it in its entirety and give me credit for it. Supporting images associated with this daily HF radio wave propagation forecast ... Continua a leggere »

The K7RA Solar Update

Solar indicators, both sunspot numbers and solar flux, both dropped this week, in fact on April 8 there were no sunspots. Average daily sunspot numbers declined from 65.9 to 16.6, and average daily solar flux went from 96.5 to 73.8, compared to the previous seven days, .Average daily planetary A index went from 15.6 to 10.6, and average daily mid-latitude ... Continua a leggere »

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