Viewing archive of Friday, 13 March 1998
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 1998 Mar 13 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 072 Issued at 2200Z on 13 MAR 1998IA. Analysis of Solar Active Regions and Activity from 12-2100Z to 13-2100Z SOLAR ACTIVITY WAS LOW. X-RAYS PASSED THE C-LEVEL VERY
LATE IN THE PERIOD, REACHING THE C5 LEVEL AT 2108Z. AT THIS WRITING
NO OPTICAL REPORT HAS BEEN RECEIVED. NEW SPOTS EMERGED IN PREVIOUSLY
SPOTLESS REGION 8173 (S19W83). THIS WAS THE SITE OF A SUBFLARE AND
OCCASIONAL SURGING. THE OTHER 6 SPOTTED REGIONS VISIBLE WERE
SIMPLIFYING, IN GENERAL. REGION 8176 (S40W07) LOST SPOTS BUT GAINED
AREA AS DEVELOPMENT OCCURRED IN THE TRAILER.
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. SHORT-LIVED SUBSTORMS
OCCURRED DURING LOCAL NIGHTTIMES. THE GREATER THAN 2 MEV ELECTRON
FLUX AT GEOSYNCHRONOUS ORBIT REMAINED HIGH.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED. BRIEF SUBSTORMS MAY PERSIST
DURING LOCAL NIGHTTIMES FOR THE NEXT DAY.
III. Event Probabilities 14 MAR to 16 MAR
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 13 MAR 105 Predicted 14 MAR-16 MAR 105/105/105 90 Day Mean 13 MAR 095
V. Geomagnetic A Indices
OBSERVED AFR/AP 12 MAR 008/012 ESTIMATED AFR/AP 13 MAR 010/010 PREDICTED AFR/AP 14 MAR-16 MAR 005/008-005/005-010/008
VI. Geomagnetic Activity Probabilities 14 MAR to 16 MAR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 20% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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