Viewing archive of Tuesday, 30 March 2021

Solar activity report

Report of Solar-Geophysical Activity 2021 Mar 30 2200 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 89 Issued at 2200Z on 30 Mar 2021

IA. Analysis of Solar Active Regions and Activity from 29-2100Z to 30-2100Z

Solar activity has been at very low levels for the past 24 hours. There are currently 0 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low on days one, two, and three (31 Mar, 01 Apr, 02 Apr).
IIA. Geophysical Activity Summary 29-2100Z to 30-2100Z
The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 402 km/s at 30/2044Z. Total IMF reached 6 nT at 30/1642Z. The maximum southward component of Bz reached -4 nT at 30/1921Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 782 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to unsettled levels on day one (31 Mar) and quiet levels on days two and three (01 Apr, 02 Apr).
III. Event Probabilities 31 Mar to 02 Apr
Class M01%01%01%
Class X01%01%01%
IV. Penticton 10.7 cm Flux
  Observed       30 Mar 080
  Predicted   31 Mar-02 Apr 075/075/070
  90 Day Mean        30 Mar 076

V. Geomagnetic A Indices
  Observed Afr/Ap 29 Mar  003/002
  Estimated     Afr/Ap 30 Mar  003/004
  Predicted    Afr/Ap 31 Mar-02 Apr  008/008-006/005-005/005

VI. Geomagnetic Activity Probabilities 31 Mar to 02 Apr
A. Middle Latitudes
Minor storm05%01%01%
Major-severe storm01%01%01%
B. High Latitudes
Minor storm25%15%15%
Major-severe storm25%05%05%

All times in UTC

<< Go to daily overview page

Latest news


A lot of people come to SpaceWeatherLive to follow the Sun's activity or if there is aurora to be seen, but with more traffic comes higher server costs. Consider a donation if you enjoy SpaceWeatherLive so we can keep the website online!

Support SpaceWeatherLive with our merchandise
Check out our merchandise

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare2024/07/16X2
Last M-flare2024/07/24M2.9
Last geomagnetic storm2024/06/28Kp8- (G4)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
June 2024164.2 -7.5
July 2024184.7 +20.5
Last 30 days182 +31

This day in history*

Solar flares
*since 1994

Social networks