Space Weather Guide


For updates and breaking Space Weather news follow Space Weather on Twitter.

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 20 February 2017

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 51 Issued at 2200Z on 20 Feb 2017

IA.  Analysis of Solar Active Regions and Activity from 19/2100Z to 20/2100Z: Solar activity has been at very low levels for the past 24 hours. There are currently 2 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 on days one, two, and three (21 Feb, 22 Feb, 23 Feb).

IIA.  Geophysical Activity Summary 19/2100Z to 20/2100Z: The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed reached a peak of 563 km/s at 19/2234Z. Total IMF reached 5 nT at 20/1427Z. The maximum southward component of Bz reached -3 nT at 20/0238Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 1049 pfu.

IIB.  Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels on day one (21 Feb), quiet to active levels on day two (22 Feb) and unsettled to minor storm levels on day three (23 Feb).

III.  Event probabilities 21 Feb-23 Feb
Class M    05/05/05
Class X    01/01/01
Proton     01/01/01
PCAF       green

IV.  Penticton 10.7 cm Flux
Observed           20 Feb 081
Predicted   21 Feb-23 Feb 081/081/081
90 Day Mean        20 Feb 077

V.  Geomagnetic A Indices
Observed Afr/Ap 19 Feb  009/009
Estimated Afr/Ap 20 Feb  010/011
Predicted Afr/Ap 21 Feb-23 Feb  010/010-012/016-016/020

VI.  Geomagnetic Activity Probabilities 21 Feb-23 Feb
A.  Middle Latitudes
Active                20/30/40
Minor Storm           05/15/25
Major-severe storm    01/01/05
B.  High Latitudes
Active                15/15/10
Minor Storm           30/30/25
Major-severe storm    30/40/60

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.