Viewing archive of Sunday, 20 April 2003

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 2003 Apr 20 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 110 Issued at 2200Z on 20 Apr 2003

IA. Analysis of Solar Active Regions and Activity from 19-2100Z to 20-2100Z

Solar activity has been low. Region 339 (N18W45) has rapidly increased in complexity over the last 24 hours, and was numbered today.
IB. Solar Activity Forecast
Solar activity is expected to be low. Regions 337 (S14E55) and 339 (N18W45) harbor the greatest potential for flare activity.
IIA. Geophysical Activity Summary 19-2100Z to 20-2100Z
The geomagnetic field has been at quiet to unsettled levels. The greater than 2 MeV fluxes at geosynchronous orbit reached high levels today.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to unsettled levels for the next 24 hours, increasing to unsettled to active levels on days 2 and 3 due to a favorably positioned coronal hole.
III. Event Probabilities 21 Apr to 23 Apr
Class M25%25%25%
Class X05%05%05%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       20 Apr 119
  Predicted   21 Apr-23 Apr  125/125/130
  90 Day Mean        20 Apr 126
V. Geomagnetic A Indices
  Observed Afr/Ap 19 Apr  010/018
  Estimated     Afr/Ap 20 Apr  017/014
  Predicted    Afr/Ap 21 Apr-23 Apr  012/012-015/015-015/015
VI. Geomagnetic Activity Probabilities 21 Apr to 23 Apr
A. Middle Latitudes
Active30%35%35%
Minor storm15%15%15%
Major-severe storm05%05%05%
B. High Latitudes
Active40%45%45%
Minor storm20%20%20%
Major-severe storm05%05%05%

<< 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!

23%
Support SpaceWeatherLive with our merchandise
Check out our merchandise

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare2024/03/28X1.1
Last M-flare2024/03/29M3.2
Last geomagnetic storm2024/03/25Kp5 (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
February 2024124.7 +1.7

This day in history*

Solar flares
12001X2.45
22014X1.45
32023X1.2
42024M3.2
52001M3.13
ApG
1199928G2
2200337G1
3201328G1
4200122G1
5199820G1
*since 1994

Social networks