lunedì 29 Novembre 2021
Breaking News
Home > Propagazione (page 12)

Propagazione

Propagation News – 21 February 2021

RSGB GB2RS News Team February 19, 2021 Well, we’ve had another week with zero sunspots, but we did have a geomagnetic disturbance. This was caused by the frozen-in Bz magnetic field of the high-speed solar wind stream going very negative. This means it can couple more easily with the Earth’s magnetic field allowing plasma to flood in. At its peak, …

Read More »

The K7RA Solar Update

Tad Cook, K7RA, Seattle, reports: A period of zero sunspots ran from February 4 – 17, but on Wednesday evening while viewing the STEREO spacecraft image, I saw a very bright area on our sun’s northeast horizon. Shortly after, Spaceweather.com reported, “A new active region is hiding just behind the sun’s northeastern limb. It might be a sunspot.” The next …

Read More »

Propagation outlook from SWPC

:Product: Weekly Highlights and Forecasts :Issued: 2021 Feb 15 0206 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 08 – 14 February 2021 Solar activity was very low. A B5 …

Read More »

Propagation News – 14 February 2021

At the risk of sounding like a stuck record, last week’s HF propagation was characterised by zero sunspots and the geomagnetic effects of a coronal hole. The lack of sunspots is now getting a bit worrying, especially when you consider that traditionally the new cycle normally ramps up quite quickly. At least one joker has said that perhaps we had …

Read More »

The K7RA Solar Update

Tad Cook, K7RA, Seattle, reports: Sunspots are gone, with none seen since February 3. Spaceweather.com reported on February 10 that a small proto-sunspot was struggling to form, but it was gone by the next day. According to Spaceweather.com, 57% of the days so far in 2021 have been spotless. This is the same as the percentage of spotless days for …

Read More »

Propagation outlook from SWPC Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2021 Feb 08 0133 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 01 – 07 February 2021 Solar activity was at very low levels …

Read More »

Propagation News – 7 February 2021

Last week was dominated by unsettled geomagnetic conditions. These were due to the effects of a high-speed stream from a solar coronal hole. The stream resulted in a co-rotating interaction region, or CIR. CIRs are transition zones between slow- and fast-moving streams of solar wind. Solar wind plasma piles up in these regions, creating density gradients and shock waves that …

Read More »

The K7RA Solar Update

Tad Cook, K7RA, Seattle, reports: We just witnessed 5 days in a row with zero sunspots, but on February 2 a small sunspot group (2801) appeared on our sun’s northwest limb. It soon rotated off the sun’s visible area, and on February 4, the sunspot number was back to zero. We will probably see a few more days with no …

Read More »

Geomagnetic Indices for January

GEOMAGNETIC INDICES – Compiled by: Phil Bytheway DXM.EiC@gmail.com Geomagnetic Summary January 1 2021 through January 31 2021 Tabulated from WWV on-line status daily (K @ 0000 UTC): ftp://ftp.swpc.noaa.gov/pub/forecasts/wwv/ Flux A K Space Wx 1 80 4 1 no storms 2 82 2 1 no storms 3 80 2 1 no storms 4 78 3 1 no storms 5 75 11 …

Read More »

Propagation outlook from SWPC Boulder Feb 1

:Product: Weekly Highlights and Forecasts :Issued: 2021 Feb 01 0159 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 25 – 31 January 2021 Solar activity was at very low levels. …

Read More »

Propagation News – 31 January 2021

We are almost into February and still the Sun is not playing ball in terms of sunspots. This week saw groups 2797, 2799 and 2800 rotate out of view, but all were minuscule and didn’t contribute much. The solar flux index was 76 on Thursday with a sunspot number of 26. There is a plage area, which can be a …

Read More »

The K7RA Solar Update

Tad Cook, K7RA, Seattle, reports: Solar activity increased this week. We saw no spotless days, and the average daily sunspot number rose from 14.7 to 28.1. Average daily solar flux was up from 76.1 to 77.2. Average daily planetary A index rose from 4 to 9.4, due to a minor geomagnetic storm on Monday. On that day Alaska’s High Latitude …

Read More »
Copy Protected by Chetan's WP-Copyprotect.