From: oler@rho.uleth.ca (Cary Oler)
Subject: Daily Summary of Solar Geophysical Activity for 30 July
Apparently-To: sci-space-news@ames.arc.nasa.gov
Followup-To: sci.space
Organization: University of Lethbridge
Date: Fri, 31 Jul 1992 07:22:09 GMT

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

                  DAILY SUMMARY OF SOLAR GEOPHYSICAL ACTIVITY

                                30 JULY, 1992

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

                  (Based In-Part On SESC Observational Data)


SOLAR AND GEOPHYSICAL ACTIVITY INDICES FOR 30 JULY
--------------------------------------------------

!!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 212, 07/30/92
10.7 FLUX=096.9  90-AVG=125        SSN=070      BKI=2122 2212  BAI=006
BGND-XRAY=B2.0     FLU1=7.4E+04  FLU10=1.2E+04  PKI=3222 2333  PAI=010
  BOU-DEV=015,009,019,019,017,015,008,017   DEV-AVG=014 NT     SWF=00:000
 XRAY-MAX= C3.2   @ 2236UT    XRAY-MIN= B1.3   @ 2130UT   XRAY-AVG= B3.0
NEUTN-MAX= +003%  @ 0345UT   NEUTN-MIN= -002%  @ 1940UT  NEUTN-AVG= +0.2%
  PCA-MAX= +0.1DB @ 2340UT     PCA-MIN= -1.3DB @ 2245UT    PCA-AVG= -0.0DB
BOUTF-MAX=55253NT @ 1303UT   BOUTF-MIN=55191NT @ 1909UT  BOUTF-AVG=55230NT
GOES7-MAX=P:+129NT@ 1824UT   GOES7-MIN=N:-006NT@ 0642UT  G7-AVG=+088,+046,+011
GOES6-MAX=P:+140NT@ 1842UT   GOES6-MIN=E:-015NT@ 1540UT  G6-AVG=+099,+005,+035
 FLUXFCST=STD:098,105,110;SESC:095,105,110 BAI/PAI-FCST=007,007,005/010,010,010
    KFCST=2234 1122 1233 2212  27DAY-AP=008,007   27DAY-KP=2231 2222 2222 2222
 WARNINGS=
   ALERTS=**245STRM:0253-2010UTC
!!END-DATA!!


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

     Solar activity was low.  The largest flare of the day was an impulsive
class C3.2/SF event from Region 7242 (N18E32) at 22:36 UT.  Aside from this
C3 subflare, only a few other minor subflares were observed from Regions 7238
(S20W08) and 7243 (N12W79).  A few low-level long-duration x-ray enhancements
were also observed during the day.  The characteristics of this activity
suggests the source may have been near or slightly behind one of the limbs.

     Minor surging was observed on the east limb near S08.  This is roughly
in the vicinity of where old Region 7220 is due to return near 01 August.

     A fairly impressive and large quiescent prominence that has been
observed on the northeast limb over the last couple of days is continuing to
rotate more fully onto the disk.

     No new regions were numbered today.

     Solar activity is expected to continue mostly low.  The background x-ray
flux and the other solar indices are expected to gradually increase over the
next several days as a group of previously eruptive regions return to the
east limb.  The regions of primary interest are old Regions 7220 and 7222.
Region 7220 is due to return first (near 01 August), followed by Region 7222
about a day later.

     The geomagnetic field was quiet over the last 24 hours and is expected
to continue mostly quiet to occasionally mildly unsettled over the next 72
hours.

     HF propagation conditions were near-normal over all regions.  Spread-F
may have slightly degraded polar and/or high latitude signal quality.
Similar conditions are expected over the next 72 hours.  Low and middle
latitudes can expect good propagation, while high and polar latitudes should
see fair to occasionally good propagation.


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

REGIONS WITH SUNSPOTS (LOCATIONS VALID AT 30/2400Z)
---------------------------------------------------
NMBR LOCATION  LO  AREA  Z   LL   NN MAG TYPE
7238  S20W08  144  0160 CSO  07  006 BETA
7241  N15E18  118  0050 HSX  02  002 ALPHA
7242  N18E32  104  0170 CSO  03  003 BETA
7243  N12W79  215  0010 BXO  06  005 BETA
7244  N17E44  092  0010 BXO  04  004 BETA
7240  S13W61  197                    PLAGE
REGIONS DUE TO RETURN 31 JULY TO 02 AUGUST
NMBR LAT    LO
7233 N07   012
7222 S11   013
7220 S13   030
7231 N03   041


LISTING OF SOLAR ENERGETIC EVENTS FOR 30 JULY
---------------------------------------------
BEGIN  MAX  END  RGN   LOC   XRAY  OP 245MHZ 10CM   SWEEP SWF
 0446 0451 0453 7238  S20W02 B6.3  SF    110
 0627 0716 0725 7243  N12W69       SF    140
 2232 2236 2240 7242  N20E34 C3.2  SF    470 12


POSSIBLE CORONAL MASS EJECTION EVENTS FOR 30 JULY
-------------------------------------------------
           UT TIME                 OPTICAL          XRAY    RADIO
 BEGIN        MAX      END     LOCATION   TYPE   SIZE  DUR  II IV
NO EVENTS OBSERVED


INFERRED CORONAL HOLES (LOCATIONS VALID AT 30/2400Z)
----------------------------------------------------
               ISOLATED HOLES AND POLAR EXTENSIONS
      EAST   SOUTH  WEST   NORTH  CAR  TYPE  POL  AREA  OBSN
                       NO HOLES VISIBLE


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