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Space Weather Guide    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 Summary For November 9-15 No space weather storms were observed. Outlook For November 18-24 No space weather storms are expected. For current space weather conditions see: Space Weather Now, Today's Space Weather and Space Weather Alerts   Joint USAF/NOAA Report of Solar and Geophysical Activity 19 Nov 2009 :Product: Report of Solar-Geophysical Activity :Issued: 2009 Nov 19 2200 UTC # Prepared jointly by the U.S. Dept. of Commerce, NOAA, # Space Weather Prediction Center and the U.S. Air Force. # Joint USAF/NOAA Report of Solar and Geophysical Activity SDF Number 323 Issued at 2200Z on 19 Nov 2009 IA. Analysis of Solar Active Regions and Activity from 18/2100Z to 19/2100Z: Solar activity has been at very low levels for the past 24 hours. Region 1033 (N19E34) a Bxo-beta , has grown in area and sunspot number. Region 1032 (N15E07) a Bxo-beta, has shown little change. No flares have occurred. IB. Solar Activity Forecast: Solar activity is expected to be at very low levels with a slight chance for a C-class flare. IIA. Geophysical Activity Summary 18/2100Z to 19/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be unsettled with a chance for isolated active periods for the next two days (20-21 November) due to a recurrent coronal hole high-speed stream. Conditions should decline to mostly quiet to unsettled levels for the third day (22 November). III. Event Probabilities 20 Nov-22 Nov Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green IV. Penticton 10.7 cm Flux Observed 19 Nov 077 Predicted 20 Nov-22 Nov 080/080/080 90 Day Mean 19 Nov 072 V. Geomagnetic A Indices Observed Afr/Ap 18 Nov 002/002 Estimated Afr/Ap 19 Nov 002/005 Predicted Afr/Ap 20 Nov-22 Nov 010/010-015/015-007/010 VI. Geomagnetic Activity Probabilities 20 Nov-22 Nov A. Middle Latitudes Active 20/30/10 Minor storm 10/15/05 Major-severe storm 01/01/01 B. High Latitudes Active 20/30/10 Minor storm 10/15/05 Major-severe storm 01/01/01 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 Note: Images and text on this page are provided by NASA/ESA SOHO website. Space Weather Today from NOAA's Space Environment Center.

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