Viewing archive of Saturday, 20 February 1999
Geophysical 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.
Solar and Geophysical Activity Summary 1999 Feb 20 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 051 Issued at 0245Z on 20 FEB 1999 This report is compiled from data received at SWO on 19 FEBA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0803 0803 0803 340 1441 1441 1447 8458 S19W56 SF 620 1615 1623 1628 8462 N21W52 C3.8 SF 420 1900 1900 1900 860 2046 2046 2046 160 2052 2053 2056 260 2113 2114 2115 200 2353 0005 0007 8464 N20W11 C1.1 SF 420
B. Proton Events
None
C. Geomagnetic Activity Summary
HE GEOMAGNETIC FIELD HAS BEEN AT
MINOR STORM LEVELS THE PAST 24 HOURS. MAJOR STORMING WHICH BEGAN
EARLY YESTERDAY HAS SLOWLY SUBSIDED. THE RADIAL SOLAR WIND SPEED IS
STILL IN EXCESS OF 500 KM/S. ENERGETIC ELECTRON FLUXES AT
GEOSYNCHRONOUS ORBIT ROSE TO HIGH LEVELS MIDWAY THROUGH THE PERIOD.
D. Stratwarm
STRATWARM ALERT/FRIDAY/STRATWARM EXISTS.
AN INTENSIFYING LARGE WARM REGION FURTHER EXISTS FROM
ALEUTIAN AREA, NORTHEASTERN SIBERIA WITH THE ADJACENT
ARCTIC ACROSS EASTERN SIBERIA / NORTHERN MONGOLIA TO
BLACK SEA. THE WARM AIR, WITH THE CENTRE OVER EASTERN
SIBERIA, SPREADING NORTHWESTWARDS, TODAY.
E. Daily Indices: (real-time preliminary/estimated values)
10 CM 164 SSN 122 AFR/AP 035/038 X-RAY BACKGROUND B6.0 DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS) GT 1 MEV 7.9E+06 GT 10 MEV 1.2E+04 P/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) DAILY ELECTRON FLUENCE GT 2 MEV 3.90E+07 E/(CM2-STER-DAY) (GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES) 3 HOUR K-INDICES: BOULDER 4 5 5 5 5 4 2 2 PLANETARY 5 5 5 5 5 4 3 3
F. Comments
None
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