Viewing archive of Tuesday, 7 December 2021

Solar activity report

Report of Solar-Geophysical Activity 2021 Dec 07 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 341 Issued at 2200Z on 07 Dec 2021

IA. Analysis of Solar Active Regions and Activity from 06-2100Z to 07-2100Z

Solar activity has been at very low levels for the past 24 hours. There are currently 1 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low on days one, two, and three (08 Dec, 09 Dec, 10 Dec).
IIA. Geophysical Activity Summary 06-2100Z to 07-2100Z
The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed reached a peak of 531 km/s at 07/1054Z. Total IMF reached 5 nT at 07/0515Z. The maximum southward component of Bz reached -4 nT at 06/2310Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 950 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet levels on days one and two (08 Dec, 09 Dec) and quiet to unsettled levels on day three (10 Dec).
III. Event Probabilities 08 Dec to 10 Dec
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       07 Dec 079
  Predicted   08 Dec-10 Dec 080/080/080
  90 Day Mean        07 Dec 087

V. Geomagnetic A Indices
  Observed Afr/Ap 06 Dec  006/005
  Estimated     Afr/Ap 07 Dec  006/008
  Predicted    Afr/Ap 08 Dec-10 Dec  006/005-006/005-007/010

VI. Geomagnetic Activity Probabilities 08 Dec to 10 Dec
A. Middle Latitudes
Active10%10%25%
Minor storm01%01%05%
Major-severe storm01%01%01%
B. High Latitudes
Active15%15%15%
Minor storm20%20%30%
Major-severe storm20%15%30%

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, Winnipeg, MB
The strength of the interplanetary magnetic field is moderate (10.08nT), the direction is slightly South (-7.51nT).

S1 - Minor solar radiation storm

Minor impacts on HF radio through polar regions

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

04:03 UTC - Hemispheric Power Index

The OVATION model predicts the Hemispheric Power Index to reach 50GW at 04:56 UTC


01:45 UTC - Geomagnetic activity

Active geomagnetic conditions (Kp4) Threshold Reached: 01:32 UTC

alert


Tuesday, 1 April 2025
22:51 UTC - Solar flare

Moderate M2.5 flare

alert


22:30 UTC - Radio Blackout

Minor R1 radio blackout in progress (≥M1 - current: M1.45)


07:15 UTC - 10cm Radio Burst

Begin Time: 01/04/2025 06:45 UTC Maximum Time: 01/04/2025 06:45 UTC Duration: 1 minutes. Peak flux: 190 sfu


Get instant alerts!

Space weather facts

Last X-flare2025/03/28X1.1
Last M-flare2025/04/01M2.4
Last geomagnetic storm2025/03/27Kp5 (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
February 2025154.6 +17.6
April 2025147 -7.6
Last 30 days128.8 -21.8

This day in history*

Solar flares
12001X28.5
22001X2.01
32001X1.59
42014M9.35
52017M8.22
DstG
11960-272G3
21973-173G3
32001-101G1
41976-101G1
51994-96G3
*since 1994

Social networks