From: oler@rho.uleth.ca (Cary Oler)
Subject: Daily Summary of Solar Geophysical Activity for 01 September
Apparently-To: sci-space-news@ames.arc.nasa.gov
Followup-To: sci.space
Organization: University of Lethbridge
Date: Wed, 2 Sep 1992 04:24:43 GMT

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                 DAILY SUMMARY OF SOLAR GEOPHYSICAL ACTIVITY

                              01 SEPTEMBER, 1992

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                  (Based In-Part On SESC Observational Data)


SOLAR AND GEOPHYSICAL ACTIVITY INDICES FOR 01 SEPTEMBER
-------------------------------------------------------

NOTE:  THE SIDC BRUSSELS PROVISIONAL INTERNATIONAL MONTHLY SUNSPOT NUMBER FOR
       AUGUST 1992 IS 64.4.

!!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 245, 09/01/92
10.7 FLUX=099.8  90-AVG=124        SSN=066      BKI=0000 1111  BAI=001
BGND-XRAY=B1.3     FLU1=5.3E+05  FLU10=1.8E+04  PKI=1000 1221  PAI=003
  BOU-DEV=003,004,004,004,006,005,005,005   DEV-AVG=004 NT     SWF=00:000
 XRAY-MAX= B4.9   @ 0441UT    XRAY-MIN= B1.1   @ 1517UT   XRAY-AVG= B1.8
NEUTN-MAX= +003%  @ 0135UT   NEUTN-MIN= -001%  @ 1650UT  NEUTN-AVG= +0.5%
  PCA-MAX= +0.1DB @ 0655UT     PCA-MIN= -0.6DB @ 1525UT    PCA-AVG= -0.0DB
BOUTF-MAX=55442NT @ 1257UT   BOUTF-MIN=55406NT @ 1643UT  BOUTF-AVG=55432NT
GOES7-MAX=P:+111NT@ 2023UT   GOES7-MIN=P:+000NT@ 2003UT  G7-AVG=+086,+035,+010
GOES6-MAX=N:****NT@ ****UT   GOES6-MIN=E:-019NT@ 1420UT  G6-AVG=+099,-013,+031
 FLUXFCST=STD:102,102,105;SESC:100,100,105 BAI/PAI-FCST=005,020,020/010,010,020
    KFCST=2122 2111 1123 4445  27DAY-AP=043,019   27DAY-KP=6665 4433 2434 4333
 WARNINGS=
   ALERTS=
!!END-DATA!!


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

     Solar activity remained very low.  The largest x-ray burst observed only
reached a class B4.9 x-ray level at 04:41 UT and was associated with
subflaring in Region 7270 (S09E26).

     Region 7270 continued to very slowly grow over the last 24 hours.
Additional small B-class subflares are expected with a chance for an isolated
weak C-class event over the next 72 hours.

     New Region 7272 (S11W38) was born on the disk today and is a simple,
small BXO type spot group.

     No other activity of interest was observed.

     Solar activity should continue mostly very low.  A weak C-class flare is
possible from Region 7270.

     The geomagnetic field was very quiet and stable today.  This trend is
not expected to continue.  The field is expected to become mostly unsettled
to active on 03 or 04 September in response to a well placed positive
polarity transequatorial coronal hole that crossed the central meridian
today.  Periods of minor storming will be possible, particularly over the
higher latitudes, when this disturbance materializes.

     HF propagation conditions were near-normal over all regions.  Signal
stability is expected to become less reliable over the next 48 to 72 hours.
Polar and high latitude signal paths should see much stronger fading near 03
or 04 September than has been observed over the last 24 hours.  Fair to poor
propagation is expected over the polar and high latitude regions, while
middle latitudes should see generally good to occasionally fair propagation.
Low latitude signal paths and equatorial regions should see mostly good
propagation throughout the period.


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

REGIONS WITH SUNSPOTS (LOCATIONS VALID AT 01/2400Z)
---------------------------------------------------
NMBR LOCATION  LO  AREA  Z   LL   NN MAG TYPE
7267  N02W59  119  0020 BXO  04  004 BETA
7270  S09E26  034  0110 DAO  08  015 BETA
7271  S09E15  045  0010 BXO  03  002 BETA
7272  S11W38  098  0010 BXO  05  005 BETA
REGIONS DUE TO RETURN 02 SEPTEMBER TO 04 SEPTEMBER
NMBR LAT    LO
7262 N17   315
7256 S15   308


LISTING OF SOLAR ENERGETIC EVENTS FOR 01 SEPTEMBER
--------------------------------------------------
BEGIN  MAX  END  RGN   LOC   XRAY  OP 245MHZ 10CM   SWEEP SWF
NO EVENTS OBSERVED


POSSIBLE CORONAL MASS EJECTION EVENTS FOR 01 SEPTEMBER
------------------------------------------------------
           UT TIME                 OPTICAL          XRAY    RADIO
 BEGIN        MAX      END     LOCATION   TYPE   SIZE  DUR  II IV
NO EVENTS OBSERVED


INFERRED CORONAL HOLES (LOCATIONS VALID AT 01/2400Z)
----------------------------------------------------
               ISOLATED HOLES AND POLAR EXTENSIONS
      EAST   SOUTH  WEST   NORTH  CAR  TYPE  POL  AREA   OBSN
52   S03E17 S16W13 S04W24 N20E09  068  ISO   POS   025 10830A


**  End of Daily Report  **
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