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Sunspot activity resumed this week, after no sunspots for seven consecutive days. Average daily sunspot number was 7.7, rising from 6.4 in the previous reporting week. Average daily solar flux was 70.1, changed little from 70.2 last week.
According to Spaceweather.com, in 2018 56% of days so far have been spotless.
Currently sunspot group 2710 and 2711 are active (2711 is growing), and 2712 is ab…
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Latest TEC map from NASA. What is TEC? Total Electron Content (or TEC) is an important descriptive quantity for the ionosphere of the Earth. TEC is the total number of free electrons integrated between two points, along a tube of one meter squared cross section, i.e., the electron columnar number density. Affected by solar activity, Total Electron Content (TEC) describes the total number of free electrons present within one square meter between two points (i.e. between the receiver and satellite involved in measuring TEC).
These maps are also used to monitor ionospheric weather, and to nowcast ionospheric storms that often occur responding to activities in solar wind and Earth’s magnetosphere as well as thermosphere.
View live data and images at http://SunSpotWatch.com
Follow: https://Twitter.com/NW7US and https://Twitter.com/hfradiospacewx
Facebook: http://NW7US.us/swhfr
And: Check out the stunning view of our Sun in action, as seen during the last five years with the Solar Dynamics Observatory (SDO):
https://www.youtube.com/watch?v=zXN-MdoGM9g
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BOOK SALE: Space Weather and Sun Science – get these from Amazon, and help us stay online!
NOTICE: When you buy this (or any item after starting with this link), you are helping us keep our SunSpotWatch.com and other resources “on the air” (up and running!). In other words, you are helping the entire community. So, check out this book:
Here is the link to Amazon:
http://g.nw7us.us/fbssw-aSWSC
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See the live aurora mapping is at http://aurora.sunspotwatch.com
If you are on Twitter, please follow these two users:
1) https://Twitter.com/NW7US
2) https://Twitter.com/hfradiospacewx
We’re on Facebook: http://NW7US.us/swhfr
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Latest TEC map from NASA. What is TEC? Total Electron Content (or TEC) is an important descriptive quantity for the ionosphere of the Earth. TEC is the total number of free electrons integrated between two points, along a tube of one meter squared cross section, i.e., the electron columnar number density. Affected by solar activity, Total Electron Content (TEC) describes the total number of free electrons present within one square meter between two points (i.e. between the receiver and satellite involved in measuring TEC).
These maps are also used to monitor ionospheric weather, and to nowcast ionospheric storms that often occur responding to activities in solar wind and Earth’s magnetosphere as well as thermosphere.
View live data and images at http://SunSpotWatch.com
Follow: https://Twitter.com/NW7US and https://Twitter.com/hfradiospacewx
Facebook: http://NW7US.us/swhfr
And: Check out the stunning view of our Sun in action, as seen during the last five years with the Solar Dynamics Observatory (SDO):
https://www.youtube.com/watch?v=zXN-MdoGM9g
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BOOK SALE: Space Weather and Sun Science – get these from Amazon, and help us stay online!
NOTICE: When you buy this (or any item after starting with this link), you are helping us keep our SunSpotWatch.com and other resources “on the air” (up and running!). In other words, you are helping the entire community. So, check out this book:
Here is the link to Amazon:
http://g.nw7us.us/fbssw-aSWSC
= = = =
See the live aurora mapping is at http://aurora.sunspotwatch.com
If you are on Twitter, please follow these two users:
1) https://Twitter.com/NW7US
2) https://Twitter.com/hfradiospacewx
We’re on Facebook: http://NW7US.us/swhfr
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Did you know? Here’s a space weather and radio propagation educational tidbit – from http://SunSpotWatch.com – at 14:00 UTC on 2018-04-23:
Our magnetosphere deflects much of the solar wind, around the Earth, generating energy. When this stored solar wind energy is released by the magnetosphere, a ‘geomagnetic substorm’ is triggered.
A geomagnetic storm is made up of many substorms, and the geomagnetic storm can have serious impact on the ionosphere.
Geomagnetic storms are almost always associated with a decreases in F-region electron density. Geomagnetic storms can result in a lowering of the maximum usable frequency of a radio path between two points on the Earth. In short, a geomagnetic storm can cause difficulties in communicating over long distances on shortwave radio frequencies.
Geomagnetic storms are rated by NOAA on a scale, G1 to G5, G5 being severe.
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What’s the difference between CB & amateur (ham) radio? Here ia a video with an opinion by our curator, Tomas (amateur radio operator, NW7US): Did NCIS TV Show Malign the Amateur Radio Service? https://www.youtube.com/watch?v=pIWJ7kKbxiM?t=1m33s
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If you are on Twitter, please follow these two users:
1) https://Twitter.com/NW7US
2) https://Twitter.com/hfradiospacewx
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Many thanks to SWLing Post contributor, Gary (W4EEY), who writes:
I want to recommend an excellent presentation on RF Interference from
the Radio Society of Great Britain (RSGB) Convention in 2015. The
presenter is Ian White, GM3SEK, who has a Blog website here:You can find the presentation video on YouTube here:
Click here to view on YouTube.
The presentation runs for about one hour and contains some valuable
information to help you fight noise and interference in your shack.
Thanks for the tip, Gary!
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