Viewing archive of Friday, 18 April 1997

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 1997 Apr 18 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 108 Issued at 2200Z on 18 APR 1997

IA. Analysis of Solar Active Regions and Activity from 17-2100Z to 18-2100Z

SOLAR ACTIVITY WAS VERY LOW. REGION 8032 (S23W34) IS THE ONLY SPOTTED REGION ON THE DISK AND CONTINUES TO DECAY.
IB. Solar Activity Forecast
SOLAR ACTIVITY WILL BE VERY LOW.
IIA. Geophysical Activity Summary 17-2100Z to 18-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO ACTIVE. REAL-TIME DATA SHOW SLIGHTLY ELEVATED SOLAR WIND SPEEDS. THE GREATER THAN 2 MEV ELECTRON FLUX WAS MODERATE TO HIGH.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS EXPECTED TO BE UNSETTLED THROUGHOUT THE PERIOD.
III. Event Probabilities 19 APR to 21 APR
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observed       18 APR 070
  Predicted   19 APR-21 APR  072/072/072
  90 Day Mean        18 APR 074
V. Geomagnetic A Indices
OBSERVED AFR/AP 17 APR  023/026
ESTIMATED AFR/AP 18 APR  020/015
PREDICTED AFR/AP 19 APR-21 APR  015/010-012/008-012/010
VI. Geomagnetic Activity Probabilities 19 APR to 21 APR
A. Middle Latitudes
Active25%20%20%
Minor storm10%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Active30%25%25%
Minor storm10%10%10%
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!

98%
Support SpaceWeatherLive with our merchandise
Check out our merchandise

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare2024/07/16X2
Last M-flare2024/07/18M2.0
Last geomagnetic storm2024/06/28Kp8- (G4)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
June 2024164.2 -7.5
July 2024175 +10.8
Last 30 days167.6 +21.6

This day in history*

Solar flares
12002X2.61
22023M5.7
32000M4.77
42000M4.39
52002M3.24
DstG
11959-183G4
21961-105G4
31980-80G3
41991-78G1
51982-73G1
*since 1994

Social networks