From: oler@rho.uleth.ca (Cary Oler)
Subject: Daily Summary of Solar Geophysical Activity for 09 April
Apparently-To: sci-space-news@ames.arc.nasa.gov
Followup-To: sci.space
Organization: University of Lethbridge
Date: Fri, 10 Apr 1992 03:24:34 GMT

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                  DAILY SUMMARY OF SOLAR GEOPHYSICAL ACTIVITY

                                09 APRIL, 1992

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                  (Based In-Part On SESC Observational Data)


SOLAR AND GEOPHYSICAL ACTIVITY INDICES FOR 09 APRIL
---------------------------------------------------

!!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 100, 04/09/92
10.7 FLUX=139.7  90-AVG=195        SSN=073      BKI=2212 2212  BAI=006
BGND-XRAY=B4.4     FLU1=1.7E+06  FLU10=9.7E+03  PKI=2222 2222  PAI=007
  BOU-DEV=010,016,009,011,012,010,009,010   DEV-AVG=011 NT     SWF=00:000
 XRAY-MAX= C2.0   @ 0059UT    XRAY-MIN= B4.1   @ 1130UT   XRAY-AVG= B5.3
NEUTN-MAX= +003%  @ 2205UT   NEUTN-MIN= -001%  @ 1820UT  NEUTN-AVG= +0.2%
  PCA-MAX= +0.1DB @ 2250UT     PCA-MIN= -0.1DB @ 2155UT    PCA-AVG= +0.0DB
BOUTF-MAX=55280NT @ 0017UT   BOUTF-MIN=55256NT @ 1924UT  BOUTF-AVG=55272NT
GOES7-MAX=P:+109NT@ 1933UT   GOES7-MIN=N:+003NT@ 2258UT  G7-AVG=+082,+041,+007
GOES6-MAX=P:+118NT@ 2030UT   GOES6-MIN=E:-021NT@ 1921UT  G6-AVG=+095,+007,+030
 FLUXFCST=STD:140,140,145;SESC:140,140,145 BAI/PAI-FCST=007,007,010/012,015,015
    KFCST=2223 3222 2223 3222  27DAY-AP=007,005   27DAY-KP=2222 2221 1211 2121
 WARNINGS=
   ALERTS=
!!END-DATA!!


BRIEF SUMMARY OF EVENTS
-----------------------

     Solar activity was low.  Region 7123 (S06W23) exhibited slow decay
throughout the day.  Flare production was notably less frequent and smaller
in magnitude.  The magnetic gradients in this region also began to relax.
M-class activity is now less likely to be observed, although a slim chance
still exists.  Most of the activity is expected to consist of small B and
C-class subflares.

     Region 7128 (S15E66) rotated more fully into view today as a moderately
sized, relatively simple bipolar spot group.  It consists primarily of a
large leader-spot and a moderately sized trailer spot, both of which have
stable and mature punumbras.  This region is fairly cool and does not appear
to have very much flare potential.  It has been dormant since it arrived on
the east limb and should continue generally quiet.

     Solar activity is expected to continue low.  Occassional C-class
subflares should be observed primarily from Region 7123.  The other meager
regions existing on the disk are expected to remain dormant and stable,
producing nothing larger than weak subflares.

     The geomagnetic field has been quiet for the last 24 hours.  No
significant changes are expected.  Conditions should remain mostly quiet to
weakly unsettled over the next 72 hours.

     HF propagation conditions were normal over all regions.  High and polar
latitude propagation improved somewhat during the last 24 hours as
geomagnetic activity over these regions subsided.  Conditions are expected to
remain favorable for stable HF propagation over all regions during the next
24 to 72 hours.


**  End of Daily Update  **
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