This page last updated March 21, 2018.



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

Current Space Weather conditions update automatically, irrespective of data on the remainder of this page!

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

March 21, 2018

VERY LOW — No flares in the past two days.


Today's Sun!


Photo Courtesy


SIDC reports Solar activity was at very low levels. The Sun is spotless. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery.

Solar activity is expected to remain at very low levels.

The greater than 10 MeV proton flux was at nominal levels.

Earth has left the coronal hole (CH) wind stream. Current solar wind parameters are at nominal levels. Solar wind speed decreased from 450 km/s to 330 km47;s, and Bz varied mostly between -3 and +3 nT (DSCOVR). The interplanetary magnetic field was directed mostly away from the Sun before midnight, and mostly towards the Sun after midnight. Geomagnetic activity was at quiet levels.

Finally, SIDC reports over the next few days, quiet to unsettled geomagnetic conditions are expected with a chance on an active episode from wind streams associated with the patchy equatorial CHs. The chance on an isolated minor storming interval is likely to increase by 24-25 March with the expected arrival of the wind stream related to the more prominent trailing extension of the southern polar CH.

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