Viewing archive of Wednesday, 14 April 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 Apr 14 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 104 Issued at 2200Z on 14 APR 1999

IA. Analysis of Solar Active Regions and Activity from 13-2100Z to 14-2100Z

SOLAR ACTIVITY HAS BEEN VERY LOW. ALL REGIONS ON THE SOLAR DISK HAVE BEEN STABLE. A NEW REGION WAS NUMBERED TODAY AS REGION 8516 (S22E66).
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW.
IIA. Geophysical Activity Summary 13-2100Z to 14-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS EXPECTED TO BE AT QUIET TO UNSETTLED LEVELS THE FIRST DAY OF THE FORECAST. ACTIVE CONDITIONS ARE EXPECTED THE SECOND AND THIRD DAY AS A RESULT OF THE CORONAL MASS EJECTION ON 13 APRIL.
III. Event Probabilities 15 APR to 17 APR
Class M15%15%15%
Class X01%01%01%
Proton01%01%01%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observed       14 APR 120
  Predicted   15 APR-17 APR  118/115/112
  90 Day Mean        14 APR 135
V. Geomagnetic A Indices
OBSERVED AFR/AP 13 APR  002/005
ESTIMATED AFR/AP 14 APR  005/007
PREDICTED AFR/AP 15 APR-17 APR  010/012-020/025-020/020
VI. Geomagnetic Activity Probabilities 15 APR to 17 APR
A. Middle Latitudes
Active15%30%30%
Minor storm10%20%20%
Major-severe storm05%10%10%
B. High Latitudes
Active15%35%35%
Minor storm10%25%25%
Major-severe storm05%15%15%

<< 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