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What is Space Weather?
Most of the time space, weather is of little concern in our everyday lives. However, when the space environment is disturbed by the variable output of
particles and radiation from the Sun, technologies that we depend on in our daily life, in space orbit as well as on the ground, can be affected. Some of
the most dramatic space weather effects occur in association with eruptions of material from the solar atmosphere into interplanetary space. Thus, our space
weather is a consequence of the behavior of the Sun, the nature of Earth's magnetic field and atmosphere, and our location in the solar system. The
increasing deployment of radiation -current- and field sensitive technological systems over the last few decades and the increasing presence of complex systems
in space combine to make society more vulnerable to solar-terrestrial disturbances. This has been emphasized by the large number of problems
associated with the severe magnetic storms between 1989 and 1991 as the 11 year solar activity cycle peaked.
SOHO Real-time View of the Sun
Space Weather Outlook
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast 21 December 2014
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 355 Issued at 2200Z on 21 Dec 2014
IA. Analysis of Solar Active Regions and Activity from 20/2100Z to 21/2100Z: Solar activity has been at moderate levels for the past 24 hours. The largest solar event of the period was a M1 event observed at 21/0732Z from Region 2242 (S18W57). There are currently 9 numbered sunspot regions on the disk.
IB. Solar Activity Forecast: Solar activity is expected to be moderate with a chance for X-class flares on days one, two, and three (22 Dec, 23 Dec, 24 Dec).
IIA. Geophysical Activity Summary 20/2100Z to 21/2100Z: The geomagnetic field has been at quiet to active levels for the past 24 hours. Solar wind speed, as measured by the ACE spacecraft, reached a peak speed of 457 km/s at 21/1847Z. Total IMF reached 17 nT at 21/1825Z. The maximum southward component of Bz reached -13 nT at 21/1854Z. Protons greater than 10 MeV at geosynchronous orbit reached a peak level of 3 pfu at 21/2015Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 400 pfu.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at unsettled to minor storm levels on day one (22 Dec) and quiet to unsettled levels on days two and three (23 Dec, 24 Dec). Protons have a chance of crossing threshold on days one, two, and three (22 Dec, 23 Dec, 24 Dec).
III. Event probabilities 22 Dec-24 Dec
Class M 85/85/85
Class X 40/40/40
IV. Penticton 10.7 cm Flux
Observed 21 Dec 206
Predicted 22 Dec-24 Dec 205/200/185
90 Day Mean 21 Dec 158
V. Geomagnetic A Indices
Observed Afr/Ap 20 Dec 006/006
Estimated Afr/Ap 21 Dec 012/015
Predicted Afr/Ap 22 Dec-24 Dec 018/022-007/008-007/008
VI. Geomagnetic Activity Probabilities 22 Dec-24 Dec
A. Middle Latitudes
Minor Storm 20/05/05
Major-severe storm 05/01/01
B. High Latitudes
Minor Storm 25/25/25
Major-severe storm 60/20/20
NOAA/SEC Satellite Environment
GOES X-Ray Flux
Dst Geomagnetic Index Estimate
Auroral Activity Extrapolated from NOAA POES
Low: Dst > -20 nT
Medium: -20 nT > Dst > -50 nT
High: High: -50 nT > Dst > -100 nT
Extreme: Dst < -100 nT
SOHO CELIAS/MTOF Proton Monitor
ACE Solar Wind Real-Time Data
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Space Weather Today from
NOAA's Space Environment Center.