Viewing archive of Saturday, 2 July 2005

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 2005 Jul 02 2210 UTC
# 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 Activity

SDF Number 183 Issued at 2200Z on 02 Jul 2005

IA. Analysis of Solar Active Regions and Activity from 01-2100Z to 02-2100Z

Solar activity was low. The majority of today's activity came from Region 785 (S22W06), which produced five C-class events. The largest of these was a C3/Sf at 0316 UTC. Region 785 has shown steady growth during the past 24 hours. An additional C-flare (C1 at 1614 UTC) was produced by Region 786 (N10E62). Region 783 (S06E21) is currently the largest group on the disk with an area of 570 millionths, but was stable and quiet. New Region 788 (S07E71) rotated into view today and is a simple H-type spot.
IB. Solar Activity Forecast
Solar activity is expected to be mostly low, but there is a chance for an isolated M-class during the next three days (3-5 July). Of the eight spotted regions on the disk, 785 and 783 appear to be the most likely sources for future M-class level activity.
IIA. Geophysical Activity Summary 01-2100Z to 02-2100Z
The geomagnetic field began the period at active levels due to the effects of a high speed stream from a coronal hole. However, the interplanetary magnetic field weakened significantly at about 0700 UTC, and conditions have been quiet to unsettled since then. Solar wind velocities remain elevated but were declining during the past 24 hours, with typical values of 540-560 km/s by forecast issue time.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be predominantly unsettled, but there is a continued chance for occasional active periods during the next two days (03-04 July) as effects from the coronal hole are expected to linger. Conditions should decline to mostly quiet by the third day (05 July).
III. Event Probabilities 03 Jul to 05 Jul
Class M30%30%30%
Class X05%05%05%
Proton05%05%05%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       02 Jul 124
  Predicted   03 Jul-05 Jul  125/125/130
  90 Day Mean        02 Jul 094
V. Geomagnetic A Indices
  Observed Afr/Ap 01 Jul  012/016
  Estimated     Afr/Ap 02 Jul  013/013
  Predicted    Afr/Ap 03 Jul-05 Jul  010/015-010/018-005/007
VI. Geomagnetic Activity Probabilities 03 Jul to 05 Jul
A. Middle Latitudes
Active30%30%20%
Minor storm15%15%10%
Major-severe storm05%05%05%
B. High Latitudes
Active35%35%20%
Minor storm20%20%10%
Major-severe storm05%05%05%

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-flare2024/12/22M1.1
Last geomagnetic storm2024/12/17Kp5+ (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
November 2024152.5 -13.9
December 2024103.3 -49.2
Last 30 days114 -43.9

This day in history*

Solar flares
12015M6.75
21998M3.34
32013M2.36
42013M1.97
52001M1.69
DstG
12002-67
22000-62G2
31989-60
42014-57
51982-53G1
*since 1994

Social networks