Viewing archive of Saturday, 10 May 2003

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 2003 May 10 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 130 Issued at 2200Z on 10 May 2003

IA. Analysis of Solar Active Regions and Activity from 09-2100Z to 10-2100Z

Solar activity was low. No significant flares have occurred in the last 24 hours, and no new regions have been numbered.
IB. Solar Activity Forecast
Solar activity is expected to be low for the next three days.
IIA. Geophysical Activity Summary 09-2100Z to 10-2100Z
The geomagnetic field was at active to major storm levels from yesterday through 10/1600 UTC. Since then conditions have been predominately unsettled. The high speed solar wind continues, but has lessened from the 750-900 km/s of yesterday to a steady 620 km/s. The greater than 2 MeV electron fluxes continue to be at high levels.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to persist at unsettled to active levels for the next day, with an increase to unsettled to minor storm levels beginning at the end of tomorrow due to a favorably positioned coronal hole. There is a chance for periods of major storm levels beginning on day two, and into day three.
III. Event Probabilities 11 May to 13 May
Class M10%05%05%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       10 May 093
  Predicted   11 May-13 May  095/095/095
  90 Day Mean        10 May 127
V. Geomagnetic A Indices
  Observed Afr/Ap 09 May  020/029
  Estimated     Afr/Ap 10 May  020/042
  Predicted    Afr/Ap 11 May-13 May  015/020-020/025-025/030
VI. Geomagnetic Activity Probabilities 11 May to 13 May
A. Middle Latitudes
Active35%40%40%
Minor storm15%20%25%
Major-severe storm05%10%15%
B. High Latitudes
Active35%40%40%
Minor storm20%25%30%
Major-severe storm10%20%25%

All times in UTC

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Current data suggests there is a slight possibility for aurora to appear at the following high latitude regions in the near future

Gillam, MB, Yellowknife, NT
A transequatorial coronal hole was detected in an earth-facing position on Monday, 24 March 2025

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Monday, 24 March 2025
Coronal hole faces Earth

The anticipated strong G3 geomagnetic storm watch never materialized as the coronal mass ejection that was supposed to arrive early yesterday didn't arrive until today just past midnight UTC. The impact was very lackluster with the Bt (total strength of the IMF) increasing to a moderate 15nT at best and the solar wind speed reaching just 420km/s. A far cry from the anticipated 700 to 800km/s. That once again goes to show how hard it is to forecast space weather events and any resulting geomagnetic conditions. We remain under the influence of the CME and high latitude sky watchers should remain alert for some nice aurora displays but middle latitude sky watchers will probably have to wait for the next opportunity. 

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13:55 UTC - Coronal hole

A transequatorial coronal hole is facing Earth. Enhanced solar wind could arrive in ~3 days

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02:45 UTC - Geomagnetic activity

Active geomagnetic conditions (Kp4) Threshold Reached: 02:33 UTC

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