Viewing archive of Sunday, 16 April 2000

Solar activity report

Report of Solar-Geophysical Activity 2000 Apr 16 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 107 Issued at 2200Z on 16 APR 2000

IA. Analysis of Solar Active Regions and Activity from 15-2100Z to 16-2100Z

SOLAR ACTIVITY WAS LOW. REGION 8955 (S21E07) ENDURES AS THE MOST COMPLEX AND ACTIVE REGION ON THE SUN. THIS REGION PRODUCED A C6/SF AT 15/2143UT AND A C6/1N AT 16/0015UT. BOTH EVENTS WERE ACCOMPANIED BY MINOR CENTIMETRIC BURSTS. NO SIGNIFICANT CHANGES WERE OBSERVED IN THE OVERALL SIZE OF THIS REGION, BUT SOME DECREASE IN COMPLEXITY WAS NOTED. REGIONS 8957 (S12W90) AND 8959 (S17W25) ALSO PRODUCED MINOR C-CLASS X-RAY FLARES. NEW REGION 8964 (N34E21) WAS NUMBERED TODAY.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW TO MODERATE. ISOLATED M-CLASS EVENTS ARE STILL POSSIBLE FROM REGION 8955. IIA. GEOPHYSICAL ACTIVITY SUMMARY FROM 15/2100Z TO 16/2100Z: THE GEOMAGNETIC FIELD WAS AT UNSETTLED TO MINOR STORM LEVELS. MINOR STORMING BEGAN AFTER A WEAK SHOCK WAS OBSERVED PASSING THE ACE SPACECRAFT AT 16/0951UT.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD SHOULD REMAIN PREDOMINANTLY UNSETTLED TO ACTIVE WITH OCCASIONAL MINOR STORMING AT HIGH LATITUDES. ACTIVE CONDITIONS MAY BE PROLONGED THROUGH DAYS TWO AND THREE BY THE ARRIVAL OF A DISTURBANCE FROM THE M4/CME EVENT ON 15/1018UT.
III. Event Probabilities 17 APR to 19 APR
Class M50%50%50%
Class X10%10%10%
Proton05%05%05%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observed       16 APR 159
  Predicted   17 APR-19 APR  160/160/165
  90 Day Mean        16 APR 184
V. Geomagnetic A Indices
OBSERVED AFR/AP 15 APR  007/007
ESTIMATED AFR/AP 16 APR  022/024
PREDICTED AFR/AP 17 APR-19 APR  015/015-015/018-012/012
VI. Geomagnetic Activity Probabilities 17 APR to 19 APR
A. Middle Latitudes
Active40%40%30%
Minor storm20%20%15%
Major-severe storm05%05%01%
B. High Latitudes
Active50%50%35%
Minor storm30%30%20%
Major-severe storm15%15%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!

12%

Space weather facts

Last X-flare:2017/09/10X8.2
Last M-flare:2017/10/20M1.0
Last geomagnetic storm:2020/02/19Kp5 (G1)
Number of spotless days in 2020:77
Current stretch spotless days:6

This day in history*

Solar flares
12001X2.3
22002M8.2
32002M1.6
42000C8.6
52000C8.2
ApG
1199439G1
2201534G1
3199526G1
4200323
5200019
*since 1994

Social networks