Thread: Solar Hole?
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Old March 15th 07, 10:06 AM posted to rec.radio.shortwave
Larry Dighera Larry Dighera is offline
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Default Solar Hole?

On Wed, 14 Mar 2007 20:58:00 -0400, Johnny Borborigmi
wrote in :

On 2007-03-14 20:06:00 -0400, Larry Dighera said:


How does this affect HF radio propagation/reception?

http://spaceweather.com/
Current
Conditions Solar Wind speed: 646.2 km/s density:
2.8 protons/cm3 Earth is inside a solar wind stream flowing
from the indicated
coronal hole. Credit: SOHO Extreme UV telescope
Daily Sun: 14 Mar '07
The sun is blank today--no sunspots. Credit: SOHO/MDI

Interplanetary Mag. Field
Btotal: 4.7 nT
Bz: 2.5 nT north


Google CME or Coronal Mass Ejection and learn all about it.


I always thought CMEs were associated with sunspots. There are no
sunspots on the side of the Sun facing us at this time, however the
solar hole seems to exist.



Real-time X-ray Solar Flares data:

http://www.sec.noaa.gov/rt_plots/xray_5m.html
This GOES X-ray flux plot contains 5 minute averages of solar
X-ray output in the 1-8 Angstrom (0.1-0.8 nm) and 0.5-4.0 Angstrom
(0.05-0.4 nm) passbands.


Coronal Mass Ejection information:

http://lasco-www.nrl.navy.mil/index....ontent/cmelist
LASCO Coronal Mass Ejections Lists
Coronal Mass Ejections (CMEs) are massive (10^14 to 10^17 grams)
bursts of plasma that are ejected from the sun. One of the
scientific objectives of LASCO is to understand why these events
occur. We do believe that they are caused by instabilities in the
solar magnetic field, which is constantly evolving. Another
scientific objective is to understand what effects CMEs have in
interplanetary space and very importantly what effects CMEs have
when they encounter the earth's environment. We know that the
energetic CMEs will cause geomagnetic storms and possibly affect
electric power transmission lines.


Real-time data:

http://lasco-www.nrl.navy.mil/index....ent/latest_img
Listed below are links to the most recent realtime images from the
LASCO and EIT instruments.