Viewing archive of Sunday, 18 July 2010

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 2010 Jul 18 2201 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 199 Issued at 2200Z on 18 Jul 2010

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

Solar activity was very low. Region 1087 (N24W48) has a simple alpha magnetic classification. A further analysis of the SOHO/LASCO imagery from yesterday show a CME was observed on C3 imagery which can be correlated with the C2 x-ray flare at 17/1801Z. This event does not seem to be Earth directed.
IB. Solar Activity Forecast
Solar activity is expected to be very low with a slight chance for a C-class flare from Region 1087.
IIA. Geophysical Activity Summary 17-2100Z to 18-2100Z
The geomagnetic field was quiet.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet levels for the next three days (19-21 July).
III. Event Probabilities 19 Jul to 21 Jul
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFGreen
IV. Penticton 10.7 cm Flux
  Observed       18 Jul 077
  Predicted   19 Jul-21 Jul  075/074/074
  90 Day Mean        18 Jul 074
V. Geomagnetic A Indices
  Observed Afr/Ap 17 Jul  001/002
  Estimated     Afr/Ap 18 Jul  001/003
  Predicted    Afr/Ap 19 Jul-21 Jul  005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 19 Jul to 21 Jul
A. Middle Latitudes
Active05%05%05%
Minor storm01%01%01%
Major-severe storm01%01%01%
B. High Latitudes
Active05%05%05%
Minor storm01%01%01%
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-flare2024/12/24M4.1
Last geomagnetic storm2024/12/17Kp5+ (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
November 2024152.5 -13.9
December 2024110.7 -41.8
Last 30 days117.3 -41.4

This day in history*

Solar flares
12001M5
22024M4.7
32024M4.1
42023M2.9
52023M2.6
DstG
11995-65G1
22014-57
32001-55G1
42002-49G1
51990-47
*since 1994

Social networks