Viewing archive of Tuesday, 15 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 15 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 166 Issued at 2200Z on 15 JUN 1999

IA. Analysis of Solar Active Regions and Activity from 14-2100Z to 15-2100Z

SOLAR ACTIVITY WAS LOW. THE FIFTEEN SPOTTED REGIONS ON THE SOLAR DISK HAVE BEEN RELATIVELY STABLE DURING THE PERIOD. REGION 8583 (S12E17) PRODUCED A C1/SF EVENT AT 15/0031Z. THREE NEW REGIONS WERE NUMBERED TODAY AS REGION 8586 (N34W18), REGION 8587 (N19E05), AND REGION 8588 (S22E20).
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW WITH AN ISOLATED CHANCE FOR AN M-CLASS EVENT.
IIA. Geophysical Activity Summary 14-2100Z to 15-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO ACTIVE. A WEAK SHOCK WAS REFLECTED IN THE ACE SOLAR WIND DATA BEGINNING AROUND 15/0700Z. THIS DISTURBANCE MAY BE ASSOCIATED WITH A CORONAL MASS EJECTION LATE ON 12 JUNE.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 16 JUN to 18 JUN
Class M30%30%30%
Class X05%05%05%
Proton01%01%01%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observed       15 JUN 159
  Predicted   16 JUN-18 JUN  155/150/150
  90 Day Mean        15 JUN 136
V. Geomagnetic A Indices
OBSERVED AFR/AP 14 JUN  002/004
ESTIMATED AFR/AP 15 JUN  005/005
PREDICTED AFR/AP 16 JUN-18 JUN  005/010-005/012-005/007
VI. Geomagnetic Activity Probabilities 16 JUN to 18 JUN
A. Middle Latitudes
Active20%20%20%
Minor storm05%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Active25%25%25%
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-flare2024/12/08X2.2
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
12001M5
22023M2.9
32023M2.6
42001M2.52
51998M2.49
DstG
11995-65G1
22014-57
32001-55G1
42002-49G1
51990-47
*since 1994

Social networks