This page last updated December 11, 2019.



The National Space Weather Program wrote, "Space weather refers to conditions on the Sun and in the space environment that can influence the performance and reliability of space-borne and ground-based technological systems, and can endanger human life or health."1

Current Space Weather

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Solar X-rays:
Geomagnetic Field:


Explanation of Space Weather Indicators Seen Above

An explanation of space weather indicators appears on a separate page.

Please go to Space Weather Indicators for the explanation. It will assist your understanding of space weather.

NOAA Space Weather Scale descriptions can be found at: NOAA Space Weather Scales.

Activity Level on the Sun

December 11, 2019

VERY LOW — No C-class flares in the past two days.


Today's Sun!


Photo Courtesy


SIDC reports visible side of the solar disc is spotless. There were no flares reported for number of days and we do not expect any flaring activity in the coming hours.

A narrow and slow, but well defined CME reported yesterday (observed in the SOHO LASCO C2 field of view at about 19:06 UT on December 09) and was associated with the brightening and small dimming at about 18:11 UT (situate at S05 W25). It is not probable that this CME will arrive to the Earth.

During last 24 hours there were no Earth directed CMEs and the solar protons remained at the background level.

The solar wind speed is presently about 420 km/s and the interplanetary magnetic field magnitude is 5 nT.

Finally, SIDC reports it is not completely clear what is the magnetic structure observed in the in situ data, and as reported yesterday. It seems like the arrival of the weak ICME was followed yesterday afternoon by the solar wind originating from the negative polarity coronal hole. The structure observed in the solar wind data did not induce disturbed geomagnetic conditions. The narrow and extended equatorial coronal hole of negative polarity reached central meridian yesterday evening. The fast solar wind associated with this coronal hole might arrive to Earth late on December 14. The geomagnetic conditions are presently quiet and we expect them to stay so in the coming hours.

Now . . . let's take a little tour into the realm of: