Viewing archive of Saturday, 31 August 2002

Solar activity report

Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Report of Solar-Geophysical Activity 2002 Aug 31 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 243 Issued at 2200Z on 31 Aug 2002

IA. Analysis of Solar Active Regions and Activity from 30-2100Z to 31-2100Z

Solar activity was at low levels. Region 95 (N07E51) was responsible for the majority of today's flare activity. The largest was a C9/Sf flare that occurred at 31/1956 UTC. White-light imagery depicts a steady growth in this groups intermediate spots and associated penumbral coverage. Analysis suggest that there may be several delta configurations contained in this beta-gamma-delta magnetically structured group. Region 87 (S08W47) showed slight growth this period and remains a beta-gamma magnetic complex. New Regions 97 (N13E36) and 98 (S10E76) were assigned today.
IB. Solar Activity Forecast
Solar activity is expected to be at moderate levels. Regions 87 and 95 have the potential to produce an isolated major flare.
IIA. Geophysical Activity Summary 30-2100Z to 31-2100Z
The geomagnetic field was predominantly at quiet to unsettled levels. Isolated active conditions were observed at both middle and high latitudes.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to unsettled levels throughout the period.
III. Event Probabilities 01 Sep to 03 Sep
Class M60%60%60%
Class X15%15%15%
Proton01%01%05%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       31 Aug 180
  Predicted   01 Sep-03 Sep  180/175/165
  90 Day Mean        31 Aug 169
V. Geomagnetic A Indices
  Observed Afr/Ap 30 Aug  007/010
  Estimated     Afr/Ap 31 Aug  008/010
  Predicted    Afr/Ap 01 Sep-03 Sep  008/010-008/010-008/010
VI. Geomagnetic Activity Probabilities 01 Sep to 03 Sep
A. Middle Latitudes
Active15%15%15%
Minor storm05%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Active20%20%20%
Minor storm10%10%10%
Major-severe storm01%01%01%

All times in UTC

<< Go to daily overview page

Active geomagnetic conditions

Observed Kp: 4
Threshold reached: 20:32 UTC

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

Oulu, Rovaniemi, Sodankylä, Utsjoki
Kirkenes, Tromsø
Murmansk
Kiruna, Luleå

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

Tórshavn
Kuopio
Bergen, Trondheim
Arkhangelsk, Vorkuta
Sundsvall, Umeå

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

Tampere
Petrozavodsk
The strength of the interplanetary magnetic field is moderate (11.5nT), the direction is slightly South (-6.63nT).

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

20:45 UTC - Geomagnetic activity

Active geomagnetic conditions (Kp4) Threshold Reached: 20:19 UTC

alert


13:00 UTC - Type II Radio Emission

Begin Time: 25/03/2025 12:36 UTC Estimated Velocity: 516km/sec.


Monday, 24 March 2025
Coronal hole faces Earth

The anticipated strong G3 geomagnetic storm watch never materialized as the coronal mass ejection that was supposed to arrive early yesterday didn't arrive until today just past midnight UTC. The impact was very lackluster with the Bt (total strength of the IMF) increasing to a moderate 15nT at best and the solar wind speed reaching just 420km/s. A far cry from the anticipated 700 to 800km/s. That once again goes to show how hard it is to forecast space weather events and any resulting geomagnetic conditions. We remain under the influence of the CME and high latitude sky watchers should remain alert for some nice aurora displays but middle latitude sky watchers will probably have to wait for the next opportunity. 

alert

Read more
13:55 UTC - Coronal hole

A transequatorial coronal hole is facing Earth. Enhanced solar wind could arrive in ~3 days

alert


02:45 UTC - Geomagnetic activity

Active geomagnetic conditions (Kp4) Threshold Reached: 02:33 UTC

alert


Get instant alerts!

Space weather facts

Last X-flare2025/02/23X2.0
Last M-flare2025/03/21M1.2
Last geomagnetic storm2025/03/22Kp6- (G2)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
February 2025154.6 +17.6
March 2025138.3 -16.4
Last 30 days136.1 -18.1

This day in history*

Solar flares
12024M4.4
22001M3.71
32001M3.57
42004M3.43
52008M2.47
DstG
11991-298G4
21990-111G2
31983-103G2
41969-97G1
52024-88G1
*since 1994

Social networks