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Propagazione

Propagation outlook from Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2019 Aug 26 0541 UTC # Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # Product description and SWPC contact on the Web # https://www.swpc.noaa.gov/content/subscription-services # # Weekly Highlights and Forecasts # Highlights of Solar and Geomagnetic Activity 19 – 25 August 2019 Solar activity was very low. The visible …

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The K7RA Solar Update

Spotless days continue this week, with consecutive days without sunspots now at 16 days, according to spaceweather.com as of August 22. Average daily solar flux for all practical purposes was unchanged, from 67.4 last week to 67.5 this week. Average daily planetary A index went slightly lower from 6.3 to 4.4. Predicted solar flux looks the same as it has …

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Propagation News – 25 August 2019

The last seven days have seen quiet geomagnetic conditions but, equally, zero sunspots and a solar flux index of around 67. Nevertheless, the Lighthouses on the Air event last weekend saw UK stations finding people to talk to, even if real DX was a little thin on the ground. Saturday, the 17th, saw numerous short-skip openings on 40m that were …

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Propagation outlook from Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2019 Aug 19 0141 UTC # Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # Product description and SWPC contact on the Web # https://www.swpc.noaa.gov/content/subscription-services # # Weekly Highlights and Forecasts # Highlights of Solar and Geomagnetic Activity 12 – 18 August 2019 Solar activity was very low. The visible …

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The K7RA Solar Update

No sunspots were visible over the recent reporting week, Thursday through Wednesday, August 8 through 14. According to Spaceweather.com, 67% of the days so far in 2019 have been spotless, and for all of 2018 it was 61%. In the previous solar minimum in 2008 and 2009 the spotless days ran 73% and 71%, respectively. Solar flux has been minimal …

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Propagation News – 18 August 2019

We had more of the same last week with zero sunspots, but no geomagnetic disturbances. The good news is that there appear to be no Earth-facing coronal holes coming around the Sun, although there are significant holes around the solar polar regions. The tool at Propquest.co.uk has been showing an interesting phenomenon over the past week. It appears that the …

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Propagation outlook from Boulder

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Perseids – a reminder

Active from July 17th to August 26th, 2019  Currently active The Perseids are the most popular meteor shower as they peak on warm August nights as seen from the northern hemisphere. The Perseids are active from July 17 to August 24. They reach a strong maximum on August 12 or 13, depending on the year. Normal rates seen from rural locations …

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The K7RA Solar Update

A new sunspot group appeared only briefly this week, on August 7-8. It was sunspot 2747, from current Cycle 24. Sunspot numbers on Monday and Tuesday were 11 and 12. Average daily solar flux shifted only slightly from last week, from 67 to 67.2. Average planetary A index, a geomagnetic indicator aggregated from magnetometers around the world, more than doubled, …

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Propagation News – 11 August 2019

Matter from a solar coronal hole hit the Earth last week as predicted. However, we got the date wrong, as it actually impacted us on Monday and not Sunday, as it was moving slightly slower than we thought. This sent the Kp index up to five as the Earth’s geomagnetic field was disturbed and where it stayed for four consecutive …

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Propagation outlook from Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2019 Aug 05 0339 UTC # Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # Product description and SWPC contact on the Web # https://www.swpc.noaa.gov/content/subscription-services # # Weekly Highlights and Forecasts # Highlights of Solar and Geomagnetic Activity 29 July – 04 August 2019 Solar activity was very low under …

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The K7RA Solar Update

No sunspots were observed over the past week, and solar flux remains flat, with average daily values declining from 67.3 to 67. Average daily planetary A index went from 5.3 to 5, and middle latitude A index from 6.3 to 5.9. Predicted solar flux for the next 45 days remains at 67, August 2 through September 15, every day. Predicted …

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