Status Report

Joint USAF/NOAA Report of Solar and Geophysical Activity 03 Nov 2003

By SpaceRef Editor
November 3, 2003
Filed under , ,

Prepared jointly by the U.S. Dept. of Commerce, NOAA,
Space Environment Center and the U.S. Air Force.

Updated 2003 Nov 03 2220 UTC

Joint USAF/NOAA Report of Solar and Geophysical Activity 03 Nov 2003

SDF Number 307 Issued at 2200Z on 03 Nov 2003


Click on image for movie of flares

IA. Analysis of Solar Active Regions and Activity from 02/2100Z
to 03/2100Z: Solar activity has been at high levels. Two X-class
events made way for yet another day of impressive major flare
activity. Region 488 (N08W82) produced an X3/2f flare at 03/0955Z
and an X2/2b event at 03/0130Z. Both flares had associated
Tenflares, Type II and IV radio sweeps, and CME’s. The associated
CME with the X3 event didn’t appear to be Earth directed, though the
X2 event may become slightly geoeffective. This Region has shown
some decay over the period although it remains a very magnetically
complex region with delta structures still evident throughout the
spot cluster. Region 486 (S17W75) was limited in flare production
today. The largest flare from this region was an M3/sf that
occurred at 03/1532Z. This region continues to exhibit a very
complex magnetic field and continues to depict a beta-gamma-delta
magnetic class structure. No new regions were numbered today.

IB. Solar Activity Forecast: Solar activity is expected to be at
high levels through day one. Regions 486 and 488 are due to exit
the disk beginning on day two which should significantly drop flare
activity by day three of the period.

IIA. Geophysical Activity Summary 02/2100Z to 03/2100Z:
The geomagnetic field was at quiet to active levels. The greater
than 10 MeV proton event that began at 02/1105Z has thus far had a
maximum of 1570 pfu, which occurred at 03/0815Z and has recently
been ranging between 400 and 800 pfu’s at the time of this writing.
The greater than 100 MeV proton event began at 02/1740Z, reached a
maximum of 49 pfu at 02/1905Z, and ended at 03/1720Z. The polar cap
absorption event remains in progress. The greater than 2 MeV
electron fluxes at geosynchronous orbit reached high levels today.

IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to range from quiet to severe storm levels through day one
of the period. A full halo CME resulting from the X8/2b event from
yesterday is expected to arrive early in the period on day one.
Additional data from SOHO/LASCO imagery indicates that there was
significant deceleration of the CME. Predominantly active
conditions are expected on day two with isolated minor storm levels
expected. Day three should see a return to unsettled to active
levels. The greater than 10 MeV proton event should drop below
alert levels by day two.

III. Event Probabilities 04 Nov-06 Nov

  • Class M 90/90/70
  • Class X 75/75/50
  • Proton 99/75/50
  • PCAF in progress

IV. Penticton 10.7 cm Flux

  • Observed 03 Nov 167
  • Predicted 04 Nov-06 Nov 145/130/120
  • 90 Day Mean 03 Nov 131

V. Geomagnetic A Indices

  • Observed Afr/Ap 02 Nov 011/018
  • Estimated Afr/Ap 03 Nov 012/015
  • Predicted Afr/Ap 04 Nov-06 Nov 080/090-025/035-015/020

VI. Geomagnetic Activity Probabilities 04 Nov-06 Nov

A. Middle Latitudes

  • Active 25/40/30
  • Minor storm 40/35/15
  • Major-severe storm 35/15/10

  • B. High Latitudes
  • Active 10/30/40
  • Minor storm 50/45/20
  • Major-severe storm 40/20/15

SpaceRef staff editor.