At the end of October, a hole in the sun’s atmosphere lashed Earth’s magnetic field with solar wind, sparking moderately-strong geomagnetic storms and almost a full week of Arctic auroras. News flash: It’s back. The same “coronal hole” is turning toward Earth again. NASA’s Solar Dynamics Observatory photographed the structure on Nov. 20th
Coronal holes are regions in the sun’s atmosphere where the magnetic field peels back and allows solar wind to escape. Since our last encounter with this hole in late October it has been transiting the farside of the sun, carried around by the sun’s 27-day rotation. Now that it is back we can see that the hole is not quite as large as it was a month ago–but it is still impressive, covering more than 1/4th of the visible solar disk.
NOAA forecasters expect the leading edge of the emerging solar wind stream to reach Earth late on Nov. 22nd, bringing with it a chance of G1-class geomagnetic storms on Nov. 23rd. Free: Aurora Alerts
Source:http://spaceweather.com/
Antenna
THE TILTED TERMINATED FOLDED DIPOLE – A PRACTICAL BUILDING GUIDE
“THE TILTED TERMINATED FOLDED DIPOLE Recently, I have been experimenting with the Tilted Terminated Folded Dipole, a.k.a. TTFD, a.k.a. T2FD. I... Read more
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HF Loop Antennas – ARRL The Doctor is In [ PodCast ]
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App - Mobile
Free Digital Mode Android App
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Remote Vacuum Relay Switch, RK-314
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RUMlogNG2Go for iOS version 3.5.2 now available
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Equipment
A $38.99 RTL-SDR with 100 Khz – 1.7 GHz coverage
RTL-SDR 100Khz-1.7GHz Full Band UV HF RTL-SDR USB Tuner Receiver/ R820T + 8232 Ham Radio 100% Brand New And High Quality Using the RTL2832 idle chann... Read more
TitanSDR – 9 kHz to 32 MHz frequency coverage
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Maestro Control Console for the FLEX-6000
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Ten-Tec PM1 QRP
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LimeSDR Mini
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News
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