Viewing archive of Sunday, 29 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 29 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 088 Issued at 2200Z on 29 MAR 1998IA. Analysis of Solar Active Regions and Activity from 28-2100Z to 29-2100Z SOLAR ACTIVITY WAS VERY LOW. THERE HAS BEEN LITTLE
ACTIVITY FROM ANY OF THE FIVE SPOTTED REGIONS ON THE DISK. OPTICALLY
UNCORELATED TYPE II AND TYPE IV SWEEP FREQUENCY BURSTS WERE OBSERVED
TODAY. THE TYPE II WAS AT 29/0245Z WITH A SHOCK SPEED OF 600 KM/S
AND THE TYPE IV WAS OBSERVED FROM 29/0302Z-29/0332Z. A 27 DEGREE
LONG FILAMENT POSITIONED IN THE NW DISAPPEARED YESTERDAY BETWEEN
28/1826Z-28/2038Z. THE SOHO/LASCO INSTRUMENT OBSERVED A LARGE
PARTIAL HALO/CME AT ABOUT 29/0348Z. THE MATERIAL MAY HAVE ORIGINATED
ON THE BACK-SIDE OF THE DISK. A NEW REGION WAS NUMBERED TODAY AS
REGION 8190 (S20E66).
IB. Solar Activity Forecast
SOLAR ACTIVITY SHOULD BE VERY LOW TO
LOW THROUGH THE PERIOD. REGION 8185 STILL HAS THE POTENTIAL FOR
PRODUCING AN ISOLATED M-CLASS EVENT.
IIA. Geophysical Activity Summary 28-2100Z to 29-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO ACTIVE. THE GREATER THAN 2 MEV
ELECTRON FLUX AT GEOSYNCHRONOUS ALTITUDE WAS HIGH.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD SHOULD BE
PRIMARILY QUIET TO UNSETTLED FOR THE NEXT THREE DAYS WITH PERIODS OF
ACTIVE CONDITIONS AT ALL LATITUDES.
III. Event Probabilities 30 MAR to 01 APR
| Class M | 20% | 20% | 20% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 29 MAR 100 Predicted 30 MAR-01 APR 100/098/098 90 Day Mean 29 MAR 099
V. Geomagnetic A Indices
OBSERVED AFR/AP 28 MAR 010/014 ESTIMATED AFR/AP 29 MAR 015/015 PREDICTED AFR/AP 30 MAR-01 APR 015/015-015/012-010/010
VI. Geomagnetic Activity Probabilities 30 MAR to 01 APR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 20% |
| Minor storm | 15% | 15% | 10% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 35% | 35% | 20% |
| Minor storm | 20% | 20% | 10% |
| Major-severe storm | 10% | 10% | 05% |
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