The following Table of Contents has been copied from the document
"Understanding Solar Terrestrial Reports."  This is meant only to provide
an overview of the material covered therein.

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                   UNDERSTANDING SOLAR TERRESTRIAL REPORTS
                                REVISION 1.1
                             PART I - CONTENTS


                                   - i -





                             Table of Contents




   Introduction ....................................................    1

   Characteristics of the Sun ......................................    2

   Sunspots and the Solar Flux .....................................    3

   The Sunspot Cycle ...............................................    6

   The 22 Year Solar Cycle .........................................    6

   The Solar Atmosphere ............................................    7

   The Photosphere .................................................    7

   The Chromosphere and Spicules ...................................    8

   The Corona and Coronal Holes ....................................    9

   Forms of Solar Activity .........................................   10

   Plages and Faculae ..............................................   11

   Prominences and Filaments .......................................   12

   Solar Flares ....................................................   14

   Polar Cap Absorption Events .....................................   16

   Significance of Sweep Frequency Events ..........................   17

   The Slowly Varying Component ....................................   17

   Type I Bursts and Radio Noise Storms ............................   18

   Type III Radio Bursts ...........................................   18

   Type V Radio Burst Emissions ....................................   19

   Type II Radio Bursts ............................................   20

   Continuum Type IV Radio Emissions ...............................   20

   The Earths Magnetic Field .......................................   21

   Geomagnetic Substorms ...........................................   22




                                May 7, 1991





                                   - ii -


   Geomagnetic Storms ..............................................   23

   Ionospheric Effects of Geomagnetic Storms .......................   24

   Radio Signal Propagation ........................................   25

   Propagation of VLF Signals ......................................   26

   HF Signal Propagation ...........................................   27

   Long-Distance VHF Signal Propagation ............................   29

   Characteristics of Auroral Activity .............................   31

   Auroral Relationship with Geomagnetic Activity ..................   31

   Significance of Aurorae to Astronomers ..........................   33

   Auroral Classifications .........................................   33

   The Impacts of Geomagnetic Storms and Solar Activity ............   35

   Magnetic Storm Induction ........................................   36

   Atmospheric Circulation Modifications ...........................   38

   Atmospheric Pressure Responses to Solar Flares ..................   38

   Atmospheric Electrical Enhancements following Major Flares ......   40

   Geomagnetic Effects on Atmospheric Pressure .....................   42

   Concluding Remarks ..............................................   44
























                                May 7, 1991


                   UNDERSTANDING SOLAR TERRESTRIAL REPORTS
                                REVISION 1.1
                             PART II - CONTENTS


                                   - i -





                             Table of Contents




   Introduction ....................................................    1

   The Solar Terrestrial Forecast and Review .......................    2

   Summary of Solar Terrestrial Activity ...........................    2

   Short Term Solar Terrestrial Forecast ...........................    5

   Solar Region Summary ............................................    6

   Geomagnetic Activity Summary ....................................    8

   10-Day Geomagnetic Activity Forecast ............................    9

   Graphical Analysis of Solar Activity ............................    9

   20-Day Solar Activity Forecast ..................................   10

   HF Radio Signal Propagation Predictions .........................   11

   VHF Propagation Prediction Charts ...............................   13

   Auroral Activity Predictions ....................................   15

   Monthly Solar Terrestrial Review ................................   16

   Geomagnetic Storm Alert .........................................   16

   Availability of Additional Services .............................   16

   Concluding Remarks ..............................................   17


















                                May 7, 1991