Viewing archive of Wednesday, 18 February 2004

Solar activity report

Report of Solar-Geophysical Activity 2004 Feb 18 2200 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 049 Issued at 2200Z on 18 Feb 2004

IA. Analysis of Solar Active Regions and Activity from 17-2100Z to 18-2100Z

Solar activity was at very low levels today. Spotless active Region 556 (N15W80) produced the largest event during the period, a B5 x-ray flare that occurred at 18/1708Z. Several lesser B-class flares comprised the remainder of the recorded activity today. No new regions were numbered today.
IB. Solar Activity Forecast
Solar activity is expected to be at very low levels.
IIA. Geophysical Activity Summary 17-2100Z to 18-2100Z
The geomagnetic field was at quiet to unsettled levels. The greater than 2 MeV electron fluxes at geosynchronous orbit reached high (neared very high) levels today.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at predominantly quiet to unsettled levels throughout the period.
III. Event Probabilities 19 Feb to 21 Feb
Class M01%01%01%
Class X01%01%01%
IV. Penticton 10.7 cm Flux
  Observed       18 Feb 098
  Predicted   19 Feb-21 Feb  100/095/100
  90 Day Mean        18 Feb 119
V. Geomagnetic A Indices
  Observed Afr/Ap 17 Feb  004/005
  Estimated     Afr/Ap 18 Feb  004/008
  Predicted    Afr/Ap 19 Feb-21 Feb  008/008-008/008-008/012
VI. Geomagnetic Activity Probabilities 19 Feb to 21 Feb
A. Middle Latitudes
Minor storm05%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Minor storm05%05%10%
Major-severe storm01%01%05%

<< Go to daily overview page

Latest news


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!


Latest alerts

Get instant alerts!

Space weather facts

Last X-flare:2017/09/10X8.2
Last M-flare:2017/10/20M1.0
Last geomagnetic storm:2019/09/28Kp5 (G1)
Number of spotless days in 2019:214
Current stretch spotless days:17

This day in history*

Solar flares
*since 1994

Social networks