Viewing archive of Wednesday, 4 November 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 Nov 04 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 308 Issued at 2200Z on 04 NOV 1998

IA. Analysis of Solar Active Regions and Activity from 03-2100Z to 04-2100Z

SOLAR ACTIVITY WAS LOW. OVERALL THE AMOUNT OF ACTIVITY HAS INCREASED APPRECIABLY SINCE YESTERDAY. REGION 8375 (N18W07) HAS BEEN THE MOST ACTIVE REGION PRODUCING SIX C-CLASS FLARES AS WELL AS SEVERAL OPTICAL SUBFLARES AND ONE 1N OPTICAL FLARE. A FULL HALO CME WAS OBSERVED BY THE LASCO/SOHO SATELLITE AT 04/0418UT. THIS WAS IN CONJUNCTION WITH A C5/SF PRODUCED BY REGION 8375. REGION 8375 IS THE LARGEST AND MOST COMPLEX REGION ON THE SUN. CURRENTLY A DAI, BETA-GAMMA SPOT GROUP. THIS REGION HAS INCREASED SLIGHTLY IN SIZE AND THE SPOT COUNT HAS INCREASED FROM 22 TO 28. OTHER ACTIVE REGIONS ARE 8376 (S27E15), 8378 (N14E63) AND 8379 (S18W28) ALL OF WHICH PRODUCED AN OPTICAL SUBFLARE. REGION 8379 IS A NEW NUMBERED REGION WITH A 5 SPOT CRO, BETA SPOT GROUP. ONE OTHER REGION WAS NUMBERED: 8380 (S20E65) WITH AN AXX, ALPHA SPOT.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO REMAIN LOW WITH POSSIBLE ISOLATED M-CLASS FLARING FROM REGION 8375.
IIA. Geophysical Activity Summary 03-2100Z to 04-2100Z
THE GEOMAGNETIC FIELD HAS BEEN QUIET.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS EXPECTED TO BE QUIET TO UNSETTLED WITH POSSIBLE ACTIVE PERIODS. THE CAUSE FOR THE POTENTIAL INCREASE IN GEOMAGNETIC ACTIVITY IS DUE TO A PARTIAL HALO CME THAT WAS OBSERVED BY THE LASCO/SOHO SATELLITE ON 02/1354UT. THIS WAS IN CONJUNCTION WITH A C1/N1 FLARE IN REGION 8376 LOCATED AT S25E44 AT THAT TIME. THE FULL HALO CME OBSERVED TODAY AT 04/0418UT COULD POSSIBLY CAUSE GEOMAGNETIC ACTIVITY LATE ON NOVEMBER 6TH OR ON NOVEMBER 7TH.
III. Event Probabilities 05 NOV to 07 NOV
Class M30%30%30%
Class X10%10%10%
Proton01%01%01%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observed       04 NOV 141
  Predicted   05 NOV-07 NOV  145/150/150
  90 Day Mean        04 NOV 132
V. Geomagnetic A Indices
OBSERVED AFR/AP 03 NOV  005/005
ESTIMATED AFR/AP 04 NOV  ???/???
PREDICTED AFR/AP 05 NOV-07 NOV  020/???-020/???-010/???
VI. Geomagnetic Activity Probabilities 05 NOV to 07 NOV
A. Middle Latitudes
Active35%35%15%
Minor storm15%15%05%
Major-severe storm01%01%01%
B. High Latitudes
Active50%50%20%
Minor storm25%25%15%
Major-severe storm01%01%01%
From [email protected] Wed Nov 4 17:41:46 1998 Received: by proton.sel.noaa.gov (1.37.109.18/16.2) id AA229939306; Wed, 4 Nov 1998 17:41:46 -0500 Return-Path: Date: Wed, 4 Nov 1998 22:40:04 GMT From: Space Environment Center Message-Id: <[email protected]> To: [email protected] Subject: RSGA Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: [email protected] Precedence: bulk :Product: Report of Solar-Geophysical Activity :Issued: 1998 Nov 04 2240 UT # Prepared jointly by the U.S. Dept. of Commerce, NOAA, #Space Environment Center and the U.S. Air Force. # JOINT USAF/NOAA REPORT OF SOLAR AND GEOPHYSICAL ACTIVIT : : : : : : : CORRECTED COPY : : : : : : : : : : : : : : SDF Number 308 Issued at 2200Z on 04 NOV 1998

IA. Analysis of Solar Active Regions and Activity from 03-2100Z to 04-2100Z

SOLAR ACTIVITY WAS LOW. OVERALL THE AMOUNT OF ACTIVITY HAS INCREASED APPRECIABLY SINCE YESTERDAY. REGION 8375 (N18W07) HAS BEEN THE MOST ACTIVE REGION PRODUCING SIX C-CLASS FLARES AS WELL AS SEVERAL OPTICAL SUBFLARES AND ONE 1N OPTICAL FLARE. A FULL HALO CME WAS OBSERVED BY THE LASCO/SOHO SATELLITE AT 04/0418UT. THIS WAS IN CONJUNCTION WITH A C5/SF PRODUCED BY REGION 8375. REGION 8375 IS THE LARGEST AND MOST COMPLEX REGION ON THE SUN. CURRENTLY A DAI, BETA-GAMMA SPOT GROUP. THIS REGION HAS INCREASED SLIGHTLY IN SIZE AND THE SPOT COUNT HAS INCREASED FROM 22 TO 28. OTHER ACTIVE REGIONS ARE 8376 (S27E15), 8378 (N14E63) AND 8379 (S18W28) ALL OF WHICH PRODUCED AN OPTICAL SUBFLARE. REGION 8379 IS A NEW NUMBERED REGION WITH A 5 SPOT CRO, BETA SPOT GROUP. ONE OTHER REGION WAS NUMBERED: 8380 (S20E65) WITH AN AXX, ALPHA SPOT.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO REMAIN LOW WITH POSSIBLE ISOLATED M-CLASS FLARING FROM REGION 8375.
IIA. Geophysical Activity Summary 03-2100Z to 04-2100Z
THE GEOMAGNETIC FIELD HAS BEEN QUIET.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS EXPECTED TO BE QUIET TO UNSETTLED WITH POSSIBLE ACTIVE PERIODS. THE CAUSE FOR THE POTENTIAL INCREASE IN GEOMAGNETIC ACTIVITY IS DUE TO A PARTIAL HALO CME THAT WAS OBSERVED BY THE LASCO/SOHO SATELLITE ON 02/1354UT. THIS WAS IN CONJUNCTION WITH A C1/N1 FLARE IN REGION 8376 LOCATED AT S25E44 AT THAT TIME. THE FULL HALO CME OBSERVED TODAY AT 04/0418UT COULD POSSIBLY CAUSE GEOMAGNETIC ACTIVITY LATE ON NOVEMBER 6TH OR ON NOVEMBER 7TH.
III. Event Probabilities 05 NOV to 07 NOV
Class M30%30%30%
Class X10%10%10%
Proton01%01%01%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observed       04 NOV 141
  Predicted   05 NOV-07 NOV  145/150/150
  90 Day Mean        04 NOV 132
V. Geomagnetic A Indices
OBSERVED AFR/AP 03 NOV  005/005
ESTIMATED AFR/AP 04 NOV  7/7
PREDICTED AFR/AP 05 NOV-07 NOV  20/12-20/15-15/10
VI. Geomagnetic Activity Probabilities 05 NOV to 07 NOV
A. Middle Latitudes
Active35%35%15%
Minor storm15%15%05%
Major-severe storm01%01%01%
B. High Latitudes
Active50%50%20%
Minor storm25%25%15%
Major-severe storm01%01%01%

All times in UTC

<< Go to daily overview page

Latest news

Support SpaceWeatherLive.com!

A lot of people come to SpaceWeatherLive to follow the Sun's activity or if there is aurora to be seen, but with more traffic comes higher server costs. Consider a donation if you enjoy SpaceWeatherLive so we can keep the website online!

SpaceWeatherLive Pro
Support SpaceWeatherLive with our merchandise
Check out our merchandise

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare2024/12/08X2.2
Last M-flare2024/12/23M8.9
Last geomagnetic storm2024/12/17Kp5+ (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
November 2024152.5 -13.9
December 2024106.6 -45.9
Last 30 days114.4 -44.3

This day in history*

Solar flares
12024M8.9
22015M6.75
31998M3.34
42013M2.36
52013M1.97
DstG
12002-67
22000-62G2
31989-60
42014-57
51982-53G1
*since 1994

Social networks