Vaata neljapäev, 23 aprill 1998 arhiivi

Päikese aktiivsuse aruanne

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.
Päikese ja geofüüsikalise aktiivsuse aruanne 1998 Apr 23 2200 UTC
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Ühine USAF / NOAA päikese- ja geofüüsikaalase aktiivsuse aruanne

SDF number 113 Välja antud 2200Z kuni 23 APR 1998

IA. Päikese aktiivsete piirkondade ja päikeseaktiivsuse analüüs alates 22-2100Z kuni 23-2100Z

SOLAR ACTIVITY WAS HIGH. AN OPTICALLY UNCORRELATED X1 X-RAY BURST WAS DETECTED AT 23/0555Z. THIS ACTIVITY WAS ASSOCIATED WITH A LARGE CORONAL MASS EJECTED OFF THE SE-NE LIMB NOTED BY SPACE-BASED SENSORS. FURTHER ANALYSIS INDICATED THE FOOT POINTS OF THE EJECTION APPEARED TO BE LOCATED NEAR RETURNING REGIONS 8190 (S21,L144) AND 8196 (N18,L144). BOTH REGIONS ARE LESS THAN A DAY BEHIND THE EAST LIMB. THE X-RAY BURST WAS ACCOMPANIED BY A 10.7CM RADIO BURST OF 430 SFU, MAKING IT A TENFLARE, AND A TYPE IV SWEEP. POST FLARE LOOPS WERE OBSERVED AS WELL. NEW SWO REGION 8209 (S22W06), A SMALL AXX GROUP, WAS NUMBERED TODAY.
IB. Päikese aktiivsuse ennustus
SOLAR ACTIVITY IS EXPECTED TO BE LOW TO MODERATE. AN INCREASE IN ACTIVITY IS EXPECTED WITH THE RETURN OF REGION 8190, ESPECIALLY IN LIGHT OF TODAY'S ACTIVITY.
IIA. Summaarne geofüüsikaline aktiivsus 22-2100Z kuni 23-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED. A SHOCK WAS NOTED ON ALL INSTRUMENTS AT ABOUT 23/1800Z, INDICATED BY AN INCREASE IN SOLAR WIND DENSITY AND SPEED, AN INCREASE IN PARTICLES DETECTED ON ACE AND GOES, AND A SMALL IMPULSE NOTED EARTH-BASED AND GEOSYNCHRONOUS MAGNETOMETERS. THE GREATER THAN 10 MEV PROTON EVENT IS STILL IN PROGRESS. THE EVENT CONTINUES TO DIMINISH AND IS CURRENTLY AT 30 PFU.
IIB. Geofüüsikalise aktiivsuse ennustus
THE GEOMAGNETIC FIELD IS EXPECTED TO BE MOSTLY UNSETTLED FOR THE NEXT 24 HOURS AT MID LATITUDES AND UNSETTLED TO ACTIVE FOR THE NEXT 48 HOURS AT HIGH LATITUDES. THEREAFTER, THE FIELD IS EXPECTED TO BE QUIET TO UNSETTLED.
III. Sündmuste tõenäosus 24 APRkuni 26 APR
Klass M15%15%15%
Klass X10%10%10%
Prooton05%05%05%
PCAFIN PROGRESS
IV. Pikklaine 10.7 cm kiirgus
  Vaadeldud       23 APR 090
  Prognoositud   24 APR-26 APR  092/094/094
  90 päeva keskmine        23 APR 104
V. Geomagneetiline A-indeks
OBSERVED AFR/AP 22 APR  005/006
ESTIMATED AFR/AP 23 APR  009/015
PREDICTED AFR/AP 24 APR-26 APR  015/020-010/015-010/012
VI. Geomagnetilised aktiivsuse tõenäosused 24 APR kuni 26 APR
A. Keskmistel laiuskraadidel
Aktiivne20%15%10%
Väike torm10%05%05%
Suur-tõsine torm05%05%05%
B. Kõrgetel laiuskraadidel
Aktiivne20%15%10%
Väike torm15%10%10%
Suur-tõsine torm05%05%05%

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