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Space Weather Observations, Alerts, and Forecast

3-day Solar-Geophysical Forecast Updated 2014 Aug 31 2200 UTC


Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 243 Issued at 2200Z on 31 Aug 2014


IA.  Analysis of Solar Active Regions and Activity from 30/2100Z to
31/2100Z: Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C7 event observed at
31/1211Z from Region 2149 (N09W63). There are currently 5 numbered
sunspot regions on the disk.

IB.  Solar Activity Forecast: Solar activity is expected to be low with
a slight chance for an M-class flare on days one, two, and three (01
Sep, 02 Sep, 03 Sep).


IIA.  Geophysical Activity Summary 30/2100Z to 31/2100Z: 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
473 km/s at 31/2028Z. Total IMF reached 7 nT at 31/1245Z. The maximum
southward component of Bz reached -6 nT at 31/1021Z. Electrons greater
than 2 MeV at geosynchronous orbit reached a peak level of 1342 pfu.

IIB.  Geophysical Activity Forecast: The geomagnetic field is expected
to be at quiet to active levels on day one (01 Sep) and quiet to
unsettled levels on days two and three (02 Sep, 03 Sep).


III.  Event probabilities 01 Sep-03 Sep
Class M    20/20/20
Class X    01/01/01
Proton     01/01/01
PCAF       green


IV.  Penticton 10.7 cm Flux
Observed           31 Aug 125
Predicted   01 Sep-03 Sep 130/130/125
90 Day Mean        31 Aug 129


V.  Geomagnetic A Indices
Observed Afr/Ap 30 Aug  011/015
Estimated Afr/Ap 31 Aug  012/014
Predicted Afr/Ap 01 Sep-03 Sep  009/012-008/008-008/008


VI.  Geomagnetic Activity Probabilities 01 Sep-03 Sep
A.  Middle Latitudes
Active                20/15/15
Minor Storm           05/01/01
Major-severe storm    01/01/01
B.  High Latitudes
Active                15/15/15
Minor Storm           20/15/15
Major-severe storm    20/10/10
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Real Time Images of the Sun


SOHO EIT 304
Click for time-lapse image of the sun
SOHO EIT 284
SOHO EIT 284 image of the sun
Mauna Loa Solar Image
Latest Mauna Loa image of the Sun

The sun is constantly monitored for sun spots and coronal mass ejections. EIT (Extreme ultraviolet Imaging Telescope) images the solar atmosphere at several wavelengths, and therefore, shows solar material at different temperatures. In the images taken at 304 Angstrom the bright material is at 60,000 to 80,000 degrees Kelvin. In those taken at 171 Angstrom, at 1 million degrees. 195 Angstrom images correspond to about 1.5 million Kelvin, 284 Angstrom to 2 million degrees. The hotter the temperature, the higher you look in the solar atmosphere.

Real Time Solar X-ray and Solar Wind


Solar Cycle Progression
Graph showing current solar cycle progression
Solar Cycle chart updated using the latest ISES predictions.
Real-Time Solar Wind
Graph showing Real-Time Solar Wind
Real-Time Solar Wind data broadcast from NASA's ACE satellite.

The Solar Cycle is observed by counting the frequency and placement of sunspots visible on the Sun. Solar minimum occurred in December, 2008. Solar maximum is expected to occur in May, 2013.

Solar X-ray Flux
Graph showing Real-Time Solar X-ray Flux
This plot shows 3-days of 5-minute solar x-ray flux values measured on the SWPC primary and secondary GOES satellites.
Satellite Environment Plot
Graph showing Real-Time Satellite Environment Plot
The Satellite Environment Plot combines satellite and ground-based data to provide an overview of the current geosynchronous satellite environment.

Auroral Activity Extrapolated from NOAA POES


Northern Hemi Auroral Map
Current Northern hemispheric power input map
Southern Hemi Auroral Map
Current Southern hemispheric power input map

Instruments on board the NOAA Polar-orbiting Operational Environmental Satellite (POES) continually monitor the power flux carried by the protons and electrons that produce aurora in the atmosphere. SWPC has developed a technique that uses the power flux observations obtained during a single pass of the satellite over a polar region (which takes about 25 minutes) to estimate the total power deposited in an entire polar region by these auroral particles. The power input estimate is converted to an auroral activity index that ranges from 1 to 10.

Credits:

Space Weather Images and Information (excluded from copyright) courtesy of: NOAA / NWS Space Weather Prediction Center, Mauna Loa Solar Observatory (HAO/NCAR), and SOHO (ESA & NASA).

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