Space Weather Guide

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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 4 October 2015

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 277 Issued at 2200Z on 04 Oct 2015

IA. Analysis of Solar Active Regions and Activity from 03/2100Z to
04/2100Z: 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
04/0241Z from old Region 2422 (S20, L=097). There are currently 1
numbered sunspot regions on the disk.

IB. Solar Activity Forecast: Solar activity is expected to be very low
with a chance for a C-class flares and a slight chance for an M-class
flare on days one, two, and three (05 Oct, 06 Oct, 07 Oct).

IIA. Geophysical Activity Summary 03/2100Z to 04/2100Z: The geomagnetic
field has been at quiet to minor storm levels for the past 24 hours.
Solar wind speed, as measured by the ACE spacecraft, reached a peak
speed of 533 km/s at 04/1449Z. Total IMF reached 10 nT at 04/0144Z. The
maximum southward component of Bz reached -9 nT at 04/0039Z.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected
to be at quiet to active levels on day one (05 Oct) and quiet to
unsettled levels on days two and three (06 Oct, 07 Oct).

III. Event probabilities 05 Oct-07 Oct
Class M 10/10/10
Class X 01/01/01
Proton 01/01/01
PCAF green

IV. Penticton 10.7 cm Flux
Observed 04 Oct 088
Predicted 05 Oct-07 Oct 085/085/085
90 Day Mean 04 Oct 104

V. Geomagnetic A Indices
Observed Afr/Ap 03 Oct 010/013
Estimated Afr/Ap 04 Oct 015/019
Predicted Afr/Ap 05 Oct-07 Oct 010/012-009/008-007/008

VI. Geomagnetic Activity Probabilities 05 Oct-07 Oct
A. Middle Latitudes
Active 25/20/20
Minor Storm 10/05/05
Major-severe storm 01/01/01
B. High Latitudes
Active 15/20/20
Minor Storm 30/30/30
Major-severe storm 35/25/25


NOAA/SEC Satellite Environment

GOES X-Ray Flux

Dst Geomagnetic Index Estimate

Auroral Activity Extrapolated from NOAA POES


Dst > -20 nT


-20 nT > Dst > -50 nT


High: -50 nT > Dst > -100 nT


Dst < -100 nT


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.