From: oler@rho.uleth.ca (Cary Oler)
Subject: Daily Summary of Solar Geophysical Activity for 22 July
Apparently-To: sci-space-news@ames.arc.nasa.gov
Followup-To: sci.space
Organization: University of Lethbridge
Date: Thu, 23 Jul 1992 04:12:28 GMT

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                  DAILY SUMMARY OF SOLAR GEOPHYSICAL ACTIVITY

                                22 JULY, 1992

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                  (Based In-Part On SESC Observational Data)


SOLAR AND GEOPHYSICAL ACTIVITY INDICES FOR 22 JULY
--------------------------------------------------

!!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 204, 07/22/92
10.7 FLUX=104    90-AVG=129        SSN=090      BKI=3345 5343  BAI=026
BGND-XRAY=B2.2     FLU1=1.3E+05  FLU10=1.2E+04  PKI=2366 6353  PAI=046
  BOU-DEV=020,030,067,087,074,026,061,031   DEV-AVG=049 NT     SWF=00:000
 XRAY-MAX= C1.6   @ 0203UT    XRAY-MIN= B1.9   @ 1415UT   XRAY-AVG= B3.1
NEUTN-MAX= +001%  @ 2120UT   NEUTN-MIN= -004%  @ 1850UT  NEUTN-AVG= -0.8%
  PCA-MAX= +0.2DB @ 1610UT     PCA-MIN= -0.2DB @ 1210UT    PCA-AVG= -0.1DB
BOUTF-MAX=55249NT @ 2335UT   BOUTF-MIN=55183NT @ 1151UT  BOUTF-AVG=55224NT
GOES7-MAX=E:+156NT@ 1120UT   GOES7-MIN=N:-050NT@ 0840UT  G7-AVG=+077,+069,+002
GOES6-MAX=P:+154NT@ 1948UT   GOES6-MIN=E:-009NT@ 1854UT  G6-AVG=+088,+024,+048
 FLUXFCST=STD:103,100,098;SESC:105,100,100 BAI/PAI-FCST=020,015,015/020,015,010
    KFCST=4555 4433 3344 3333  27DAY-AP=016,009   27DAY-KP=3442 3333 2233 3232
 WARNINGS=*GSTRM;*AURMIDWCH
   ALERTS=
!!END-DATA!!


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

     Solar activity remained low over the last 24 hours.  Region 7229
(N23W68) was responsible for most of the numerous small B and C-class
subflares.  The largest flare of the day was a class C1.6 event at 02:03 UT.

     Region 7229 continued to gradually decay.  Although fairly simple in
structure, it is the most complex group visible.  C-class subflare activity
is expected to continue from this group.

     Several other small subflares were observed today, most of which
remained below C-class x-ray levels.  The regions which contributed
subflare activity include Regions 7230 (S14W46), 7232 (N17W90), and 7236
(N18W02).

     A prominence in the western section of Region 7229 erupted at 05:23 UT.
Other activity included a disappearing filament near N29W45.

     New Region 7237 (N06W36) was numbered today and exists as a small,
simple BXO type spot group.

     Solar activity is expected to be very low to low.  C-class flare
activity is possible in Regions 7229 and 7236.  Most of the other regions
will likely only contribute small isolated B-class subflares.

     The geomagnetic field has been generally active with periods of minor to
major storming, particularly over the high latitude regions.  Minor storming
was observed over numerous middle latitude regions during the local night
sectors, while high latitudes observed periods of major storming.  A well
placed coronal hole is the source of this activity.  The field is expected to
continue generally active with periods of minor storming over the middle
latitudes and minor to major storm periods over the high latitude regions.
Conditions should begin to stabilize later on 23 July and 24 July.

     Levels of auroral activity increased substantially after 03:00 UT.
Moderate levels of auroral activity dominated over the high latitude regions,
with activity being observed as far south as St. Leonard, New Brunswick (47
degrees geographic latitude) and Grand Forks, North Dakota (48 N).  Similar
conditions should persist over the next 24 hours, with activity being
observed into the northern tier of the U.S. states.  Activity is expected to
become more dormant during the UT day of 24 July.

     HF propagation conditions were degraded over the polar, high, and
northerly middle latitude paths, particularly between 09:00 UT and 15:00 UT.
Geomagnetic storming and associated elevated levels of auroral activity
produced strong fading, increased signal absorption, and multipathing.  These
effects were strongest over paths that crossed near or through the auroral
zone.  Similar conditions are expected for much of 23 July.  Gradual
improvements should begin to be observed late in the UT day of 23 July or on
24 July.  High and polar latitude signal paths will require an extra day or
two (24 or 25 July) to return to near-normal.


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

REGIONS WITH SUNSPOTS (LOCATIONS VALID AT 22/2400Z)
---------------------------------------------------
NMBR LOCATION  LO  AREA  Z   LL   NN MAG TYPE
7229  N23W68  310  0060 DAO  10  004 BETA
7232  N17W19  261  0000 AXX  01  002 ALPHA
7234  S17W65  307  0040 CAO  09  004 BETA
7235  S04W58  300  0020 HRX  02  002 ALPHA
7236  N18W02  244  0040 DRO  05  014 BETA
7237  N06W36  278  0010 BXO  03  004 BETA
7227  N14W73  315                    PLAGE
7230  S14W46  288                    PLAGE
REGIONS DUE TO RETURN 23 JULY TO 25 JULY
NMBR LAT    LO
7216 N14   115


LISTING OF SOLAR ENERGETIC EVENTS FOR 22 JULY
---------------------------------------------
BEGIN  MAX  END  RGN   LOC   XRAY  OP 245MHZ 10CM   SWEEP SWF
NO EVENTS OBSERVED


POSSIBLE CORONAL MASS EJECTION EVENTS FOR 22 JULY
-------------------------------------------------
           UT TIME                 OPTICAL          XRAY    RADIO
 BEGIN        MAX      END     LOCATION   TYPE   SIZE  DUR  II IV
21/A1505          22/B1344       N29W45   DSF
22/B0523             A1505       N20W90   EPL
22/B1320             A1615       N22W90   EPL


INFERRED CORONAL HOLES (LOCATIONS VALID AT 22/2400Z)
----------------------------------------------------
               ISOLATED HOLES AND POLAR EXTENSIONS
      EAST   SOUTH  WEST   NORTH  CAR  TYPE  POL  AREA  OBSN
44   N32W34 N00W54 N25W69 N32W34  303  ISO   POS   029 10830A
45   N05E34 S13E34 N07E25 N10E28  216  ISO   NEG   007 10830A


**  End of Daily Report  **
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