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GEOMAGNETIC STORM WARNING!!!!!!
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[quote:Esoteric Morgan:MV8xMjMxMDIyXzIwMDQ2MTM2XzEwOUFFQjlF] http://www.spaceweather.com/ GEOMAGNETIC STORM WARNING: NOAA forecasters estimate a 40% chance of severe geomagnetic storms around the poles on Oct. 25th. The forecast is prompted by a possible double whammy: both a solar wind stream and a CME could hit Earth's magnetic field on that date. High-latitude sky watchers should be alert for auroras. ================================================= CURRENT: Planetary K-index Now: Kp= 3 quiet 24-hr max: Kp= 5 storm ================================================ ================================================ http://www.swpc.noaa.gov/NOAAscales/index.html [b]G 4 Severe Kp = 8, including a 9- [/b] Power systems: possible widespread voltage control problems and some protective systems will mistakenly trip out key assets from the grid. Spacecraft operations: may experience surface charging and tracking problems, corrections may be needed for orientation problems. Other systems: induced pipeline currents affect preventive measures, HF radio propagation sporadic, satellite navigation degraded for hours, low-frequency radio navigation disrupted, and [b]aurora has been seen as low as Alabama and northern California [/b](typically 45° geomagnetic lat.)**. ======================================================== [b]G 3 Strong Kp = 7 [/b] Power systems: voltage corrections may be required, false alarms triggered on some protection devices. Spacecraft operations: surface charging may occur on satellite components, drag may increase on low-Earth-orbit satellites, and corrections may be needed for orientation problems. Other systems: intermittent satellite navigation and low-frequency radio navigation problems may occur, HF radio may be intermittent, and [b]aurora has been seen as low as Illinois and Oregon[/b] (typically 50° geomagnetic lat.)**. ========================================================== [b]G 2 Moderate Kp = 6 [/b] systems: high-latitude power systems may experience voltage alarms, long-duration storms may cause transformer damage. Spacecraft operations: corrective actions to orientation may be required by ground control; possible changes in drag affect orbit predictions. Other systems: HF radio propagation can fade at higher latitudes, and [b]aurora has been seen as low as New York and Idaho [/b](typically 55° geomagnetic lat.)**. ====================================================== [b]G 1 Minor Kp = 5 [/b] [b]CURRENT WARNING[/b] Power systems: weak power grid fluctuations can occur. Spacecraft operations: minor impact on satellite operations possible. Other systems: migratory animals are affected at this and higher levels; [b]aurora is commonly visible at high latitudes (northern Michigan and Maine)**. [/b] ========================================================== Relationship between Kp and the Aurora http://www.spaceweather.com/glossary/kp.html [/quote]
Original Message
GEOMAGNETIC STORM WARNING: NOAA forecasters estimate a 40% chance of severe geomagnetic storms around the poles on Oct. 25th. The forecast is prompted by a possible double whammy: both a solar wind stream and a CME could hit Earth's magnetic field on that date. High-latitude sky watchers should be alert for auroras.
Planetary K-index
Now: Kp= 3 quiet
24-hr max: Kp= 5 storm
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
30 %
30 %
MINOR
50 %
50 %
SEVERE
20 %
20 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
10 %
MINOR
50 %
50 %
SEVERE
40 %
40 % [
link to spaceweather.com
]
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