From: oler@rho.uleth.ca (Cary Oler)
Subject: Daily Summary of Solar Geophysical Activity for 27 August
Apparently-To: sci-space-news@ames.arc.nasa.gov
Followup-To: sci.space
Organization: University of Lethbridge
Date: Fri, 28 Aug 1992 19:44:14 GMT

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                 DAILY SUMMARY OF SOLAR GEOPHYSICAL ACTIVITY

                               27 AUGUST, 1992

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                  (Based In-Part On SESC Observational Data)


SOLAR AND GEOPHYSICAL ACTIVITY INDICES FOR 27 AUGUST
----------------------------------------------------

!!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 240, 08/27/92
10.7 FLUX=093.8  90-AVG=125        SSN=054      BKI=2234 4222  BAI=013
BGND-XRAY=B1.1     FLU1=4.4E+05  FLU10=1.5E+04  PKI=3233 4332  PAI=013
  BOU-DEV=013,016,028,048,051,015,011,014   DEV-AVG=024 NT     SWF=00:000
 XRAY-MAX= B5.0   @ 2014UT    XRAY-MIN= A9.8   @ 1231UT   XRAY-AVG= B1.7
NEUTN-MAX= +005%  @ 0005UT   NEUTN-MIN= -001%  @ 1455UT  NEUTN-AVG= +0.8%
  PCA-MAX= +0.1DB @ 1850UT     PCA-MIN= -0.2DB @ 1015UT    PCA-AVG= -0.0DB
BOUTF-MAX=*****NT @ ****UT   BOUTF-MIN=*****NT @ ****UT  BOUTF-AVG=55397NT
GOES7-MAX=P:+107NT@ 1741UT   GOES7-MIN=N:****NT@ ****UT  G7-AVG=+077,+044,+011
GOES6-MAX=P:+102NT@ 0002UT   GOES6-MIN=E:****NT@ ****UT  G6-AVG=+086,-006,+032
 FLUXFCST=STD:098,103,103;SESC:095,100,100 BAI/PAI-FCST=010,010,010/010,010,010
    KFCST=2224 4112 2224 4112  27DAY-AP=011,009   27DAY-KP=2223 2334 3312 2322
 WARNINGS=
   ALERTS=
!!END-DATA!!


SYNOPSIS OF ACTIVITY
--------------------

     Solar activity was very low.  The largest flare of the day was a B5.0
x-ray event at 20:14 UT.  Only a couple of other small B-class flares were
observed today.

     Region 7267 (N03E10) is the most significant group visible.  It is
visibly the hottest region and is growing in both size and magnetic
complexity.  Isolated C-class flare activity could begin to be observed from
this region over the next 48 hours.

     No new regions were numbered today.

     Solar activity should continue mostly very low.  There is an increasing
probability for C-class flare activity from Region 7267.  There are no
regions on the sun capable of producing anything more energetic than weak
C-class events.  Old Region 7248 is expected to return on 28 August.  No
notable east-limb activity has occurred in the vicinity of this old region,
suggesting the group has decayed and further simplified since it last
departed the west limb two weeks ago.

     The geomagnetic field varied from quiet to active levels over the last
24 hours.  High latitudes observed periods of major storming between 09:00 UT
and 15:00 UT.  The source of this activity has not been clearly determined.
The field is expected to be quiet to unsettled over the next 72 hours.

     HF propagation conditions ranged from near-normal to well below normal
over the middle and high latitude signal paths.  Strong substorming over the
higher latitudes between 09:00 UT and 15:00 UT contributed to moderate to
strongly degraded signals over these oblique paths.  Conditions returned to
near normal by the end of the UT day.  Propagation should be near-normal over
the next 72 hours.


COPIES OF JOINT USAF/NOAA SESC SOLAR GEOPHYSICAL REPORTS
========================================================

REGIONS WITH SUNSPOTS (LOCATIONS VALID AT 27/2400Z)
---------------------------------------------------
NMBR LOCATION  LO  AREA  Z   LL   NN MAG TYPE
7265  S19W41  167  0000 AXX  01  001 ALPHA
7267  N03E10  116  0040 BXO  07  015 BETA
7268  N06W48  174  0040 CRO  06  008 BETA
7264  N13W89  215                    PLAGE
7266  N12W13  139                    PLAGE
REGIONS DUE TO RETURN 28 AUGUST TO 30 AUGUST
NMBR LAT    LO
7248 S13   027


LISTING OF SOLAR ENERGETIC EVENTS FOR 27 AUGUST
-----------------------------------------------
BEGIN  MAX  END  RGN   LOC   XRAY  OP 245MHZ 10CM   SWEEP SWF
NO EVENTS OBSERVED


POSSIBLE CORONAL MASS EJECTION EVENTS FOR 27 AUGUST
---------------------------------------------------
           UT TIME                 OPTICAL          XRAY    RADIO
 BEGIN        MAX      END     LOCATION   TYPE   SIZE  DUR  II IV
NO EVENTS OBSERVED


INFERRED CORONAL HOLES (LOCATIONS VALID AT 27/2400Z)
----------------------------------------------------
               ISOLATED HOLES AND POLAR EXTENSIONS
      EAST   SOUTH  WEST   NORTH  CAR  TYPE  POL  AREA   OBSN
51   N25W61 N19W74 N19W74 N27W73  231  ISO   POS   001 10830A
52   N12E77 S18E59 N06E45 N14E72  073  ISO   POS   011 10830A


**  End of Daily Report  **
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