From: oler@rho.uleth.ca (Cary Oler)
Subject: Daily Summary of Solar Geophysical Activity for 25 September
Apparently-To: sci-space-news@ames.arc.nasa.gov
Followup-To: sci.space
Organization: University of Lethbridge
Date: Sat, 26 Sep 1992 22:39:45 GMT

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                 DAILY SUMMARY OF SOLAR GEOPHYSICAL ACTIVITY

                              25 SEPTEMBER, 1992

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                  (Based In-Part On SESC Observational Data)


SOLAR AND GEOPHYSICAL ACTIVITY INDICES FOR 25 SEPTEMBER
-------------------------------------------------------

!!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 269, 09/25/92
10.7 FLUX=115.7  90-AVG=124        SSN=120      BKI=1112 2233  BAI=007
BGND-XRAY=B2.4     FLU1=3.7E+05  FLU10=1.7E+04  PKI=2112 3232  PAI=007
  BOU-DEV=008,005,008,014,015,014,021,025   DEV-AVG=013 NT     SWF=00:000
 XRAY-MAX= B9.1   @ 0504UT    XRAY-MIN= B2.1   @ 2323UT   XRAY-AVG= B3.0
NEUTN-MAX= +004%  @ 2350UT   NEUTN-MIN= -001%  @ 1245UT  NEUTN-AVG= +0.5%
  PCA-MAX= +0.1DB @ 1415UT     PCA-MIN= -0.2DB @ 2130UT    PCA-AVG= -0.0DB
BOUTF-MAX=55437NT @ 2109UT   BOUTF-MIN=55411NT @ 1840UT  BOUTF-AVG=55427NT
GOES7-MAX=P:+145NT@ 2013UT   GOES7-MIN=N:-011NT@ 0906UT  G7-AVG=+090,+032,+010
GOES6-MAX=P:+154NT@ 2013UT   GOES6-MIN=E:-024NT@ 1636UT  G6-AVG=+100,-014,+026
 FLUXFCST=STD:117,120,120;SESC:120,120,125 BAI/PAI-FCST=010,010,010/010,010,010
    KFCST=2223 4222 2223 4222  27DAY-AP=015,007   27DAY-KP=4534 2222 1122 3221
 WARNINGS=
   ALERTS=**MAGSI:15NT@1920UTC
!!END-DATA!!


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

     Solar activity continued very low.  Flare activity remained confined to
weak B-class levels, although there has been a notable increase in weak x-ray
burst activity over the last 24 hours.

     Perhaps the most interesting activity that was observed today was strong
surging on the northeast limb near N16.  New Region 7295 (N14E82) rotated
onto the limb near this position as an H-type spot.  However, limb proximity
prevented a better determination of the character of this region.  C-class
flare activity is possible from this area.

     Solar activity is expected to be low.  C-class flares are possible from
Regions 7295 and 7294 (S12E58).  At the present time, M-class flare activity
is not expected from any of the regions visible.

     The geomagnetic field was quiet until 19:20 UT when a weak sudden
magnetic impulse of approximately 15 nanoteslas was observed over middle
latitude regions.  Generally quiet to unsettled conditions prevailed through
the remainder of the day.  The field is expected to continue mostly unsettled
over the next 24 to 72 hours.

     HF propagation conditions were near-normal over all regions.  No
significant changes are expected over the next 72 hours.


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

REGIONS WITH SUNSPOTS (LOCATIONS VALID AT 25/2400Z)
---------------------------------------------------
NMBR LOCATION  LO  AREA  Z   LL   NN MAG TYPE
7283  S15W63  166  0080 HSX  02  001 ALPHA
7287  N07W69  172  0010 BXO  06  004 BETA
7288  S17W47  150  0050 CSO  07  005 BETA
7289  S09W00  103  0240 HHX  03  004 ALPHA
7291  S05W27  130  0010 BXO  03  003 BETA
7292  N18E35  068  0010 BXO  03  003 BETA
7293  S07E40  063  0090 DAO  07  008 BETA
7294  S12E58  045  0210 HSX  03  001 ALPHA
7295  N14E82  021  0060 HSX  02  001 ALPHA
7285  S08W64  167                    PLAGE
7290  N17W62  165                    PLAGE
REGIONS DUE TO RETURN 26 SEPTEMBER TO 28 SEPTEMBER
NMBR LAT    LO
NONE


LISTING OF SOLAR ENERGETIC EVENTS FOR 25 SEPTEMBER
--------------------------------------------------
BEGIN  MAX  END  RGN   LOC   XRAY  OP 245MHZ 10CM   SWEEP SWF
NO EVENTS OBSERVED


POSSIBLE CORONAL MASS EJECTION EVENTS FOR 25 SEPTEMBER
------------------------------------------------------
           UT TIME                 OPTICAL          XRAY    RADIO
 BEGIN        MAX      END     LOCATION   TYPE   SIZE  DUR  II IV
NO EVENTS OBSERVED


INFERRED CORONAL HOLES (LOCATIONS VALID AT 25/2400Z)
----------------------------------------------------
               ISOLATED HOLES AND POLAR EXTENSIONS
      EAST   SOUTH  WEST   NORTH  CAR  TYPE  POL  AREA   OBSN
56   S20E46 S30E41 N10E15 N11E26  080  ISO   POS   028 10830A


**  End of Daily Report  **
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