Geophysical report

Viewing archive of Thursday, 20 May 2004

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.

:Product: 20040520SGAS.txt :Issued: 2004 May 20 0250 UT Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 141 Issued at 0245Z on 20 May 2004 This report is compiled from data received at SWO on 19 May

A. Energetic Events

Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
None

B. Proton Events

None

C. Geomagnetic Activity Summary

The geomagnetic field was mostly quiet to unsettled. An isolated active period occurred at some locations at 19/1500-1800 UTC.

D. Stratwarm

None

E. Daily Indices: (real-time preliminary/estimated values)

10 cm 109  SSN 087  Afr/Ap 005/006   X-ray Background B1.7
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 1.3e+05   GT 10 MeV 1.4e+04 p/(cm2-ster-day)
(GOES-11 satellite synchronous orbit W96 degrees)
Daily Electron Fluence
GT 2 MeV 2.20e+06 e/(cm2-ster-day)
(GOES-12 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 1 3 1 3 3 4 3 3 Planetary 1 2 1 1 3 2 2 2

F. Comments

  The ACE spacecraft orbit will bring ACE nearly in line
with the Sun from about May 30 to June 2, 2004. During that time
solar radio noise is expected to interfere with spacecraft telemetry
resulting in the loss of solar wind plasma, magnetic field, and
particle data.

All times in UTC

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The strength of the interplanetary magnetic field is moderate (12.06nT), the direction is North (4.53nT).

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