Viewing archive of Tuesday, 23 March 1999

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 1999 Mar 23 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 082 Issued at 2200Z on 23 MAR 1999

IA. Analysis of Solar Active Regions and Activity from 22-2100Z to 23-2100Z

SOLAR ACTIVITY WAS VERY LOW. ONLY A COUPLE OF LOW-LEVEL B-CLASS X-RAY FLARES OCCURRED. NO OPTICAL FLARE REPORTS WERE RECEIVED. ALL DISK REGIONS ARE SMALL AND SIMPLE. NEW REGION 8498 (N18E67) ROTATED AROUND THE EAST LIMB AS A SINGLE H-TYPE SUNSPOT.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY LOW TO LOW.
IIA. Geophysical Activity Summary 22-2100Z to 23-2100Z
THE GEOMAGNETIC FIELD WAS QUIET.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS EXPECTED TO BE QUIET TO UNSETTLED. ACTIVITY LEVELS MAY INCREASE DUE TO A DSF AND ASSOCIATED CME THAT OCCURRED ON 21 MARCH.
III. Event Probabilities 24 MAR to 26 MAR
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observed       23 MAR 113
  Predicted   24 MAR-26 MAR  110/110/115
  90 Day Mean        23 MAR 141
V. Geomagnetic A Indices
OBSERVED AFR/AP 22 MAR  003/003
ESTIMATED AFR/AP 23 MAR  005/005
PREDICTED AFR/AP 24 MAR-26 MAR  015/010-015/010-010/010
VI. Geomagnetic Activity Probabilities 24 MAR to 26 MAR
A. Middle Latitudes
Active25%25%15%
Minor storm15%15%10%
Major-severe storm05%05%05%
B. High Latitudes
Active25%25%15%
Minor storm15%15%10%
Major-severe storm10%10%05%

All times in UTC

<< 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!

100%
Support SpaceWeatherLive with our merchandise
Check out our merchandise

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare2024/10/31X2.03
Last M-flare2024/11/05M4.1
Last geomagnetic storm2024/10/12Kp5 (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
September 2024141.4 -74.1
November 2024215.8 +74.4
Last 30 days160.9 +7.7

This day in history*

Solar flares
12013X4.93
21998X1.21
32014X1.14
42003M7.6
52004M5.72
DstG
12023-172G3
21991-92G2
31986-74G1
41959-73G1
51993-71G1
*since 1994

Social networks