From: oler@rho.uleth.ca (Cary Oler)
Subject: Daily Summary of Solar Geophysical Activity for 27 September
Apparently-To: sci-space-news@ames.arc.nasa.gov
Followup-To: sci.space
Organization: University of Lethbridge
Date: Mon, 28 Sep 1992 08:31:40 GMT

                /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\

                 DAILY SUMMARY OF SOLAR GEOPHYSICAL ACTIVITY

                              27 SEPTEMBER, 1992

                /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\

                  (Based In-Part On SESC Observational Data)


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

!!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 271, 09/27/92
10.7 FLUX=121.1  90-AVG=124        SSN=132      BKI=1121 1111  BAI=003
BGND-XRAY=B2.7     FLU1=5.0E+05  FLU10=1.4E+04  PKI=1111 1211  PAI=004
  BOU-DEV=005,007,010,008,003,005,005,009   DEV-AVG=006 NT     SWF=00:000
 XRAY-MAX= C2.9   @ 2024UT    XRAY-MIN= B2.1   @ 0532UT   XRAY-AVG= B3.9
NEUTN-MAX= +005%  @ 1010UT   NEUTN-MIN= +000%  @ 2350UT  NEUTN-AVG= +1.1%
  PCA-MAX= +0.1DB @ 2255UT     PCA-MIN= -0.1DB @ 2350UT    PCA-AVG= +0.0DB
BOUTF-MAX=55437NT @ 1331UT   BOUTF-MIN=55409NT @ 1646UT  BOUTF-AVG=55428NT
GOES7-MAX=P:+390NT@ 1305UT   GOES7-MIN=N:+003NT@ 0706UT  G7-AVG=+077,+034,+010
GOES6-MAX=P:+103NT@ 0001UT   GOES6-MIN=E:-021NT@ 1648UT  G6-AVG=+088,-015,+019
 FLUXFCST=STD:120,120,120;SESC:120,120,120 BAI/PAI-FCST=007,010,020/010,015,035
    KFCST=2222 2222 2233 3322  27DAY-AP=007,007   27DAY-KP=1321 2222 1321 2222
 WARNINGS=
   ALERTS=**245STRM:1327-1456UTC
!!END-DATA!!


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

     Solar activity continued low.  Region 7295 (N13E53) produced the largest
subflare of the day, a class C2.9/SF event at 20:24 UT.

     Region 7295 experienced modest growth today, developing to a CSO type
spot group of 120 millionths.  Region 7293 (S07E11) also showed minor growth.
Both of these regions are capable of C-class flare activity.

     A minor filament disappeared near the central meridian (N01E05) over the
last 24 hours, but is not expected to be geoeffective.

     Two new regions were assigned: Regions 7296 (N06E54) and 7297 (S16W05).

     Solar activity is expected to continue low to very low.  Occasional
C-class flare activity is possible in Regions 7293 and 7295.  None of the
regions appear to be M-class capable at the present time.

     The geomagnetic field was quiet over the last 24 hours.  A mild
enhancement in geomagnetic activity is expected over the next 24 to 48 hours
and could be followed by a period of minor storming near 30 September in
response to a well placed coronal hole which has previously been quite
geoeffective.

     HF propagation conditions were near-normal over all regions.  No
significant changes are expected prior to 30 September.  Polar and high
latitude signal paths should begin to see instabilities develop near 30
September as levels of geomagnetic and auroral activity increase.
Propagation over these regions could become moderately degraded, with effects
noticable into the middle latitude regions.


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
7283  S16W89  166  0000 AXX  01  001 ALPHA
7288  S16W74  151  0000 AXX  00  001 ALPHA
7289  S09W25  102  0180 CSO  05  006 BETA
7291  S05W55  132  0010 BXO  03  002 BETA
7292  N20E09  068  0000 AXX  00  001 ALPHA
7293  S06E12  065  0120 EAO  11  013 BETA
7294  S11E31  046  0240 HHX  03  001 ALPHA
7295  N14E55  022  0120 CSO  04  003 BETA
7296  N06E55  022  0050 CSO  04  003 BETA
7297  S16W05  082  0000 AXX  00  001 ALPHA
REGIONS DUE TO RETURN 28 SEPTEMBER TO 30 SEPTEMBER
NMBR LAT    LO
7281 N12   321


LISTING OF SOLAR ENERGETIC EVENTS FOR 27 SEPTEMBER
--------------------------------------------------
BEGIN  MAX  END  RGN   LOC   XRAY  OP 245MHZ 10CM   SWEEP SWF
 2019 2024 2029 7295  N14E59 C2.9  SF    280
 2130 2130 2131                          150


POSSIBLE CORONAL MASS EJECTION EVENTS FOR 27 SEPTEMBER
------------------------------------------------------
           UT TIME                 OPTICAL          XRAY    RADIO
 BEGIN        MAX      END     LOCATION   TYPE   SIZE  DUR  II IV
26/B1335          27/A1330       N01E05   DSF


INFERRED CORONAL HOLES (LOCATIONS VALID AT 27/2400Z)
----------------------------------------------------
               ISOLATED HOLES AND POLAR EXTENSIONS
      EAST   SOUTH  WEST   NORTH  CAR  TYPE  POL  AREA   OBSN
56   S20E15 S28E03 N06W11 N09W05  083  ISO   POS   019 10830A
57   N21E25 N15E21 N18E17 N25E23  044  ISO   POS   000 10830A


**  End of Daily Report  **
Newsgroups: sci.space.news