From: oler@rho.uleth.ca (Cary Oler)
Subject: Daily Summary of Solar Geophysical Activity for 26 August
Apparently-To: sci-space-news@ames.arc.nasa.gov
Followup-To: sci.space
Organization: University of Lethbridge
Date: Thu, 27 Aug 1992 08:08:38 GMT

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                 DAILY SUMMARY OF SOLAR GEOPHYSICAL ACTIVITY

                               26 AUGUST, 1992

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                  (Based In-Part On SESC Observational Data)


SOLAR AND GEOPHYSICAL ACTIVITY INDICES FOR 26 AUGUST
----------------------------------------------------

PLEASE NOTE:  The BOUTF parameters are not accurate at this time.

!!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 239, 08/26/92
10.7 FLUX=092.5  90-AVG=125        SSN=042      BKI=4242 3222  BAI=013
BGND-XRAY=B1.8     FLU1=6.0E+05  FLU10=1.2E+04  PKI=4343 3332  PAI=016
  BOU-DEV=063,014,052,019,021,015,012,015   DEV-AVG=026 NT     SWF=00:000
 XRAY-MAX= B5.5   @ 1506UT    XRAY-MIN= B1.6   @ 2359UT   XRAY-AVG= B2.2
NEUTN-MAX= +004%  @ 1400UT   NEUTN-MIN= -001%  @ 1655UT  NEUTN-AVG= +1.1%
  PCA-MAX= +0.2DB @ 1050UT     PCA-MIN= -0.3DB @ 1315UT    PCA-AVG= +0.0DB
BOUTF-MAX=55452NT @ 2222UT   BOUTF-MIN=55416NT @ 1748UT  BOUTF-AVG=55435NT
GOES7-MAX=P:+112NT@ 0004UT   GOES7-MIN=N:-013NT@ 0707UT  G7-AVG=+078,+048,+011
GOES6-MAX=P:+130NT@ 0004UT   GOES6-MIN=E:-013NT@ 0752UT  G6-AVG=+088,-003,+037
 FLUXFCST=STD:093,100,103;SESC:095,100,100 BAI/PAI-FCST=010,015,010/013,010,010
    KFCST=2223 3122 4444 4444  27DAY-AP=010,011   27DAY-KP=3222 2333 2223 2334
 WARNINGS=
   ALERTS=
!!END-DATA!!


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

     Solar activity became very low.  Very little activity was observed
today.  The largest flare of the day was a weak B5.5 event at 15:06 UT.

     A small filament disappeared between 02:36 UT and 17:55 UT near N07W29.

     A single new region was numbered as Region 7268 (N08W35).

     Solar activity is expected to continue very low for the next 24 hours.
C-class flare activity may become possible again when and if old Region 7248
(S13, L=027) rotates back into view on 28 August.  This region was
responsible for four M-class flares on its last rotation.  It was in a state
of minor decay as it approached and departed the west limb on 15 August and
had a minor level of associated magnetic complexity.

     The geomagnetic field was generally quiet today, although a few active
to minor storm level conditions were observed between 06:00 UT and 09:00 UT.
The field is expected to be mostly unsettled to quiet over the next 24 hours.
Activity may become slightly enhanced on 28 August due to a few recent
filament disappearances.

     A burst of auroral activity produced weak levels of aurorae visible
from as far south as Jamestown, North Dakota (located at N47 geographic
latitude) between 06:00 UT and 08:00 UT.

     HF propagation conditions were near-normal over all regions.  Similar
conditions are expected over the next 24 hours.  On 28 August, there is a
chance high and polar latitude signal paths may become mildly unstable due to
a possible enhancement in geomagnetic activity.  Otherwise, conditions should
continue near-normal.


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

REGIONS WITH SUNSPOTS (LOCATIONS VALID AT 26/2400Z)
---------------------------------------------------
NMBR LOCATION  LO  AREA  Z   LL   NN MAG TYPE
7265  S18W27  166  0020 HSX  01  001 ALPHA
7267  N03E23  116  0020 BXO  06  008 BETA
7268  N07W35  174  0010 CRO  03  003 BETA
7264  N13W76  215                    PLAGE
7266  N17W00  139                    PLAGE
REGIONS DUE TO RETURN 27 AUGUST TO 29 AUGUST
NMBR LAT    LO
7248 S13   027


LISTING OF SOLAR ENERGETIC EVENTS FOR 26 AUGUST
-----------------------------------------------
BEGIN  MAX  END  RGN   LOC   XRAY  OP 245MHZ 10CM   SWEEP SWF
NO EVENTS OBSERVED


POSSIBLE CORONAL MASS EJECTION EVENTS FOR 26 AUGUST
---------------------------------------------------
           UT TIME                 OPTICAL          XRAY    RADIO
 BEGIN        MAX      END     LOCATION   TYPE   SIZE  DUR  II IV
26/B0236             A1755       N07W29   DSF


INFERRED CORONAL HOLES (LOCATIONS VALID AT 26/2400Z)
----------------------------------------------------
               ISOLATED HOLES AND POLAR EXTENSIONS
      EAST   SOUTH  WEST   NORTH  CAR  TYPE  POL  AREA   OBSN
                        NO HOLES VISIBLE


**  End of Daily Report  **
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