Viewing archive of Sunday, 13 February 2000
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 2000 Feb 13 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 044 Issued at 2200Z on 13 FEB 2000IA. Analysis of Solar Active Regions and Activity from 12-2100Z to 13-2100Z SOLAR ACTIVITY WAS LOW. REGION 8858 (N24W50), IN A
STATE OF DECAY, HAD THE DAY'S SOLE C-CLASS FLARE (C1/SF) AT 0539Z.
PROMINENCE ACTIVITY OCCURRED ON THE NORTHWEST LIMB NEAR WHERE REGION
8855 (N18W90) DEPARTED. NEWLY ASSIGNED REGION 8873 (S18E66) ROTATED
FULLY INTO VIEW.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW.
IIA. Geophysical Activity Summary 12-2100Z to 13-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO ACTIVE. THE RECENT STORM SUBSIDED
AS THE INTERPLANETARY MAGNETIC FIELD RETURNED TO MORE NORMAL
CONDITIONS. HOWEVER, THE SOLAR WIND SPEED IS STILL ELEVATED, NOW AT
APPROXIMATELY 575 KM/S. THE GREATER THAN 10 MEV PROTONS AT
GEOSYNCHRONOUS ORBIT HAVE RETURNED TO BACKGROUND VALUES.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED FOR THE NEXT THREE DAYS. THERE IS
A CHANCE FOR SHORT-LIVED ACTIVE CONDITIONS TO OCCUR DURING LOCAL
NIGHTTIME HOURS.
III. Event Probabilities 14 FEB to 16 FEB
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 13 FEB 160 Predicted 14 FEB-16 FEB 155/150/150 90 Day Mean 13 FEB 169
V. Geomagnetic A Indices
OBSERVED AFR/AP 12 FEB 035/052 ESTIMATED AFR/AP 13 FEB 013/015 PREDICTED AFR/AP 14 FEB-16 FEB 010/015-010/008-005/005
VI. Geomagnetic Activity Probabilities 14 FEB to 16 FEB
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 40% | 20% | 10% |
| Minor storm | 10% | 05% | 05% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 50% | 30% | 20% |
| Minor storm | 15% | 10% | 10% |
| Major-severe storm | 05% | 05% | 01% |
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