Viewing archive of Friday, 27 August 2021

Solar activity report

Report of Solar-Geophysical Activity 2021 Aug 27 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 239 Issued at 2200Z on 27 Aug 2021

IA. Analysis of Solar Active Regions and Activity from 26-2100Z to 27-2100Z

Solar activity has been at low levels for the past 24 hours. The largest solar event of the period was a C3 event observed at 26/2322Z from Region 2860 (S30E14). There are currently 4 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be low with a slight chance for an M-class flare on days one, two, and three (28 Aug, 29 Aug, 30 Aug).
IIA. Geophysical Activity Summary 26-2100Z to 27-2100Z
The geomagnetic field has been at quiet to active levels for the past 24 hours. Solar wind speed reached a peak of 525 km/s at 27/1906Z. Total IMF reached 16 nT at 27/1315Z. The maximum southward component of Bz reached -15 nT at 27/1847Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 161 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to minor storm levels on days one, two, and three (28 Aug, 29 Aug, 30 Aug).
III. Event Probabilities 28 Aug to 30 Aug
Class M15%15%15%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       27 Aug 090
  Predicted   28 Aug-30 Aug 090/090/090
  90 Day Mean        27 Aug 079

V. Geomagnetic A Indices
  Observed Afr/Ap 26 Aug  006/006
  Estimated     Afr/Ap 27 Aug  018/022
  Predicted    Afr/Ap 28 Aug-30 Aug  012/015-011/018-022/025

VI. Geomagnetic Activity Probabilities 28 Aug to 30 Aug
A. Middle Latitudes
Active40%35%30%
Minor storm25%35%40%
Major-severe storm05%20%25%
B. High Latitudes
Active10%05%05%
Minor storm20%20%15%
Major-severe storm65%75%80%

All times in UTC

<< Go to daily overview page

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!

62%
Support SpaceWeatherLive with our merchandise
Check out our merchandise

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare2024/05/15X2.9
Last M-flare2024/05/19M1.6
Last geomagnetic storm2024/05/17Kp6 (G2)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
April 2024136.5 +31.6
May 2024157.5 +21
Last 30 days164.6 +42.2

This day in history*

Solar flares
12004M3.73
22023M2.6
32002M2.14
41997M1.73
52023M1.4
ApG
1197348G3
2194845G2
3198444G2
4200329G2
5198329G2
*since 1994

Social networks