Viewing archive of torsdag, 23 april 1998

Solaktivitetsrapport

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.
Rapport för sol- och geofysisk aktivitet 1998 Apr 23 2200 UTC
Skapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com

USAF/NOAA rapport för sol- och geofysisk aktivitet

SDF Nummer 113 publicerat klockan 2200Z på 23 APR 1998

IA. Analys av solfläcksgrupper och solaktivitet från 22-2100Z till 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. Prognos för solaktivitet
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. Sammanfattning av geofysisk aktivitet 22-2100Z till 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. Prognos för geofysisk aktivitet
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. Chans för solutbrott från 24 APR till 26 APR
M-klass15%15%15%
X-klass10%10%10%
Proton05%05%05%
PCAFIN PROGRESS
IV. Penticton 10.7 cm Flux
  Observerad       23 APR 090
  Prognoserat   24 APR-26 APR  092/094/094
  90 Day Mean        23 APR 104
V. Geomagnetiskt A-index
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. Chanser för geomagnetisk aktivitet från 24 APR till 26 APR
A. Medelhöga breddgrader
Aktivt20%15%10%
Små stormförhållanden10%05%05%
Svåra stormförhållanden05%05%05%
B. Höga breddgrader
Aktivt20%15%10%
Små stormförhållanden15%10%10%
Svåra stormförhållanden05%05%05%

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