Viewing archive of Monday, 20 March 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 Mar 20 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 080 Issued at 2200Z on 20 MAR 2000IA. Analysis of Solar Active Regions and Activity from 19-2100Z to 20-2100Z SOLAR ACTIVITY REMAINED MODERATE. REGION 8910 (N13W35)
PRODUCED AN M2/2B FLARE AT 1644Z. THE REGION HAD NUMEROUS SMALLER
EVENTS AS IT REMAINED LARGE (680 MILLIONTHS IN WHITE LIGHT) AND
COMPLEX (BETA-GAMMA DELTA). EARLIER IN THE DAY, AN M2/LIMB FLARE
WITH TYPES II AND IV SWEEP OCCURRED AT 0834Z, FROM AN AREA NEAR
S18E90. NEWLY ASSIGNED REGION 8921 (S15E71) IS NEARBY, BUT LIMB
PROXIMITY PROHIBITS AN UNAMBIGUOUS DETERMINATION OF THE SOURCE OF
THAT ACTIVITY. SOHO DATA SUGGEST THERE MAY BE MULTIPLE ACTIVE
REGIONS COMING INTO VIEW THERE. ELSEWHERE, A SECOND NEW REGION, 8920
(N24E55), WAS NUMBERED.
IB. Solar Activity Forecast
SOLAR ACTIVITY SHOULD REMAIN MODERATE.
REGION 8910 IS LIKELY TO PRODUCE M-CLASS EVENTS, WITH A CHANCE OF
AN ISOLATED X-CLASS FLARE.
IIA. Geophysical Activity Summary 19-2100Z to 20-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO PERSIST AT QUIET TO UNSETTLED CONDITIONS.
III. Event Probabilities 21 MAR to 23 MAR
| Class M | 70% | 50% | 50% |
| Class X | 15% | 10% | 10% |
| Proton | 15% | 10% | 10% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 20 MAR 210 Predicted 21 MAR-23 MAR 215/220/225 90 Day Mean 20 MAR 174
V. Geomagnetic A Indices
OBSERVED AFR/AP 19 MAR 006/008 ESTIMATED AFR/AP 20 MAR 005/008 PREDICTED AFR/AP 21 MAR-23 MAR 010/008-010/015-010/010
VI. Geomagnetic Activity Probabilities 21 MAR to 23 MAR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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