Solar activity


Friday, September 18th 2020, 06:30:00 UTC

Regions with Sunspots

Analysis of Solar Active Regions and Activity from 16/2100Z to 17/2100Z

Solar activity has been at very low levels for the past 24 hours. There are currently 0 numbered sunspot regions on the disk.

Solar Activity Forecast

Solar activity is expected to be very low on days one, two, and three (18 Sep, 19 Sep, 20 Sep).

24 hr48 hr72 hr
Event probabilities 18 Sep-20 Sep
Class M01 %01 %01 %
Class X01 %01 %01 %
Proton01 %01 %01 %

PCAF: green

Geophysical Activity Summary 16/2100Z to 17/2100Z

The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 343 km/s at 17/0150Z. Total IMF reached 5 nT at 17/0134Z. The maximum southward component of Bz reached -4 nT at 17/0529Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 192 pfu.

Geophysical Activity Forecast

The geomagnetic field is expected to be at quiet levels on days one, two, and three (18 Sep, 19 Sep, 20 Sep).

Geomagnetic Activity Probabilities 18 Sep-20 Sep

24 hr48 hr72 hr
Middle Latitudes
Active10 %10 %05 %
Minor Storm01 %01 %01 %
Major-severe storm01 %01 %01 %
24 hr48 hr72 hr
High Latitudes
Active15 %15 %15 %
Minor Storm15 %15 %15 %
Major-severe storm10 %10 %05 %

3-days of 5-minute solar x-ray flux values (GOES-15)

Manually reviewed and edited by the duty forecaster


Sources: NOAA's Space Weather Prediction Center (SWPC), Joint Science Operations Center (JSOC)

Contact us