Viewing archive of Wednesday, 24 March 2021

Solar activity report

Report of Solar-Geophysical Activity 2021 Mar 24 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 83 Issued at 2200Z on 24 Mar 2021

IA. Analysis of Solar Active Regions and Activity from 23-2100Z to 24-2100Z

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 slight chance for a C-class flare on days one, two, and three (25 Mar, 26 Mar, 27 Mar).
IIA. Geophysical Activity Summary 23-2100Z to 24-2100Z
The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed reached a peak of 472 km/s at 23/2115Z. Total IMF reached 8 nT at 24/1955Z. The maximum southward component of Bz reached -7 nT at 24/1929Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 4501 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to unsettled levels on day one (25 Mar) and quiet levels on days two and three (26 Mar, 27 Mar).
III. Event Probabilities 25 Mar to 27 Mar
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       24 Mar 084
  Predicted   25 Mar-27 Mar 080/080/080
  90 Day Mean        24 Mar 077

V. Geomagnetic A Indices
  Observed Afr/Ap 23 Mar  009/008
  Estimated     Afr/Ap 24 Mar  011/012
  Predicted    Afr/Ap 25 Mar-27 Mar  009/008-006/005-006/005

VI. Geomagnetic Activity Probabilities 25 Mar to 27 Mar
A. Middle Latitudes
Active25%05%05%
Minor storm10%01%01%
Major-severe storm01%01%01%
B. High Latitudes
Active15%15%15%
Minor storm30%20%20%
Major-severe storm30%10%10%

All times in UTC

<< Go to daily overview page

Current data suggests there is a moderate possibility for aurora to appear at the following high latitude regions in the near future

Gillam, MB, Whitehorse, YT, Yellowknife, NT
Fairbanks, AK

Current data suggests there is a slight possibility for aurora to appear at the following high latitude regions in the near future

Edmonton, AB, Iqaluit, NU, Saskatoon, SK
Anchorage, AK, Juneau, AK

Current data suggests there is a slight possibility for aurora to appear at the following middle latitude regions in the near future

Calgary, AB
The solar wind speed is currently moderately high (651.1 km/sec.)
The Disturbance Storm Time index predicts moderate storm conditions right now (-58nT)

Latest news

Support SpaceWeatherLive.com!

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!

Donate SpaceWeatherLive Pro
Support SpaceWeatherLive with our merchandise
Check out our merchandise

Latest alerts

04:15 UTC - Geomagnetic activity

Minor G1 geomagnetic storm (Kp5) Threshold Reached: 04:05 UTC

alert


03:15 UTC - Geomagnetic activity

Moderate G2 geomagnetic storm (Kp6) Threshold Reached: 02:59 UTC

alert


01:00 UTC - Geomagnetic activity

Minor G1 geomagnetic storm (Kp5) Threshold Reached: 00:51 UTC

alert


Friday, 4 April 2025
23:30 UTC - Geomagnetic activity

Minor G1 geomagnetic storm (Kp5) Threshold Reached: 23:17 UTC

alert


21:03 UTC - Hemispheric Power Index

The OVATION model predicts the Hemispheric Power Index to reach 75GW at 21:49 UTC


Get instant alerts!

Space weather facts

Last X-flare2025/03/28X1.1
Last M-flare2025/04/01M2.5
Last geomagnetic storm2025/04/04Kp5+ (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
March 2025134.2 -20.4
April 2025148 +13.8
Last 30 days130.9 -15.2

This day in history*

Solar flares
12001X1.21
22001M7.3
32001M4.52
42013M3.28
52004M2.47
DstG
11993-165G3
21968-112G3
31978-109G1
41984-108G2
51989-101G2
*since 1994

Social networks