Viewing archive of Thursday, 19 July 2001

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 2001 Jul 19 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 200 Issued at 2200Z on 19 Jul 2001

IA. Analysis of Solar Active Regions and Activity from 18-2100Z to 19-2100Z

Solar activity was moderate with a single M1/1b flare from Region 9537 (S08W66) at 19/1004 UTC. Outside of the M1, the only other significant event was a C5/Sf from Region 9546 (S17E19) at 18/2141 UTC. No new regions were numbered today.
IB. Solar Activity Forecast
Solar activity is expected to be primarily low.
IIA. Geophysical Activity Summary 18-2100Z to 19-2100Z
The geomagnetic field was quiet to unsettled except for one active period at high latitudes. The solar wind continued to exhibit characteristics of a high speed stream. The flux of greater than two MeV electrons at geosynchronous orbit reached high levels.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be primarily quiet to unsettled. Isolated active periods are possible due to the effects of a recurrent coronal hole. The flux of greater than two MeV electrons at geosynchronous orbit is forecast to reach high levels through the period.
III. Event Probabilities 20 Jul to 22 Jul
Class M25%25%25%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       19 Jul 142
  Predicted   20 Jul-22 Jul  140/140/140
  90 Day Mean        19 Jul 159
V. Geomagnetic A Indices
  Observed Afr/Ap 18 Jul  008/011
  Estimated     Afr/Ap 19 Jul  009/009
  Predicted    Afr/Ap 20 Jul-22 Jul  010/012-008/010-008/008
VI. Geomagnetic Activity Probabilities 20 Jul to 22 Jul
A. Middle Latitudes
Active20%15%15%
Minor storm05%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Active25%25%20%
Minor storm05%05%05%
Major-severe storm01%01%01%

<< 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-flare2024/03/23X1.1
Last M-flare2024/03/28M7.0
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
12024M7.0
22001M6.17
32000M4.46
42022M4.0
52014M3.79
ApG
1200144G2
2200327G2
3199721G2
4201727G1
5200421G1
*since 1994

Social networks