Viewing archive of Tuesday, 8 June 1999

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 1999 Jun 08 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 159 Issued at 2200Z on 08 JUN 1999

IA. Analysis of Solar Active Regions and Activity from 07-2100Z to 08-2100Z

SOLAR ACTIVITY WAS LOW. AS HAS BEEN THE PATTERN OF THE PAST FEW DAYS, JUST OCCASIONAL SMALL C-CLASS EVENTS OCCURRED. REGION 8574 (N28E01) WAS THE MOST ACTIVE CENTER, AND REMAINS BRIGHT IN H-ALPHA. TWO NEW REGIONS WERE ASSIGNED; 8577 (N19W37) AND 8578 (N19E04).
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW.
IIA. Geophysical Activity Summary 07-2100Z to 08-2100Z
THE GEOMAGNETIC FIELD VARIED FROM QUIET TO ACTIVE. SOLAR WIND DATA SHOW PROLONGED PERIODS OF SOUTHWARD IMF, PERHAPS ASSOCIATED WITH THE PASSAGE OF A RECURRENT STRUCTURE ASSOCIATED WITH THE HELIOSPHERIC CURRENT SHEET.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS EXPECTED TO BE UNSETTLED DURING THE NEXT 24 HOURS, WITH A CHANCE OF ACTIVE CONDITIONS DURING LOCAL NIGHTTIMES. QUIET CONDITIONS SHOULD PREVAIL JUNE 10-11.
III. Event Probabilities 09 JUN to 11 JUN
Class M30%30%30%
Class X05%05%05%
Proton05%05%05%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observed       08 JUN 157
  Predicted   09 JUN-11 JUN  155/150/145
  90 Day Mean        08 JUN 134
V. Geomagnetic A Indices
OBSERVED AFR/AP 07 JUN  004/004
ESTIMATED AFR/AP 08 JUN  015/012
PREDICTED AFR/AP 09 JUN-11 JUN  010/010-005/005-005/005
VI. Geomagnetic Activity Probabilities 09 JUN to 11 JUN
A. Middle Latitudes
Active30%10%10%
Minor storm05%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Active40%15%15%
Minor storm05%05%05%
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-flare2024/11/06X2.39
Last M-flare2024/11/25M9.3
Last geomagnetic storm2024/11/10Kp5+ (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
October 2024166.4 +25
November 2024145.5 -20.9
Last 30 days158.8 +11.1

This day in history*

Solar flares
12000X2.81
22001X1.68
32000X1.18
42024M9.3
52000M5.13
DstG
11982-192G3
21978-149G3
32001-145
41986-105G3
52023-99G2
*since 1994

Social networks