From: oler@rho.uleth.ca (Cary Oler)
Subject: Daily Summary of Solar Geophysical Activity for 14 April
Apparently-To: sci-space-news@ames.arc.nasa.gov
Followup-To: sci.space
Organization: University of Lethbridge
Date: Wed, 15 Apr 1992 05:07:02 GMT

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                  DAILY SUMMARY OF SOLAR GEOPHYSICAL ACTIVITY

                                14 APRIL, 1992

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                  (Based In-Part On SESC Observational Data)


SOLAR AND GEOPHYSICAL ACTIVITY INDICES FOR 14 APRIL
---------------------------------------------------

!!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 105, 04/14/92
10.7 FLUX=154.2  90-AVG=193        SSN=125      BKI=0211 2222  BAI=005
BGND-XRAY=B4.7     FLU1=1.2E+06  FLU10=8.0E+03  PKI=2212 2333  PAI=010
  BOU-DEV=004,013,006,006,015,010,013,017   DEV-AVG=010 NT     SWF=00:000
 XRAY-MAX= C1.7   @ 1731UT    XRAY-MIN= B4.5   @ 2327UT   XRAY-AVG= B6.5
NEUTN-MAX= +003%  @ 1630UT   NEUTN-MIN= -001%  @ 2240UT  NEUTN-AVG= +0.4%
  PCA-MAX= +0.4DB @ 1800UT     PCA-MIN= -1.1DB @ 1335UT    PCA-AVG= +0.0DB
BOUTF-MAX=55434NT @ 0042UT   BOUTF-MIN=55242NT @ 1812UT  BOUTF-AVG=55269NT
GOES7-MAX=P:+133NT@ 2056UT   GOES7-MIN=N:-004NT@ 0759UT  G7-AVG=+087,+033,+009
GOES6-MAX=P:+145NT@ 2059UT   GOES6-MIN=E:-021NT@ 1848UT  G6-AVG=+101,-001,+025
 FLUXFCST=STD:155,160,165;SESC:155,160,165 BAI/PAI-FCST=015,010,010/015,010,010
    KFCST=3335 5443 2224 4221  27DAY-AP=013,006   27DAY-KP=4432 2222 2111 2221
 WARNINGS=
   ALERTS=**MAGSI:12NT@2025UT
!!END-DATA!!


BRIEF SUMMARY OF EVENTS
-----------------------

     Solar activity became low today.  Two small low-level C-class flares
were observed today.  The largest of these was a C1.7 event at 17:31 UT.
X-ray activity was stable at B-class levels throughout the remainder of the
day.

     Region 7132 (S26E65) rotated more fully into view today as a
magnetically simple, but moderately interesting E-type spot group.  C-class
flare activity is possible from this region.

     New Region 7133 (N08W24) emerged as a simple B-type spot group over the
last 24 hours.

     Several other interesting events occurred today that are worthy of note.
A fairly large and tenuous filament centered near N22E26 (near 12:00 UT on 13
April) disappeared sometime between 06:00 UT and 12:00 UT today.  This
filament was near 20 degrees in length.  There is only a slight chance this
eruption may have a minor terrestrial impact over the next 72 hours.

     Surging was observed again on the east limb near N03 and S22.  Surging
was also observed on the west limb at S07 associated with the departure of
Region 7123 (S07W90).

     Solar activity is expected to continue low to possibly very low.  Either
Region 7132 or possibly 7128 appear to be the best candidates for more
energetic flare activity in the C-class range.  At this time, no M-class
flares are expected.

     The geomagnetic field has been quiet over the last 24 hours.  A sudden
magnetic impulse measuring approximately 10 to 20 nanotesla was observed from
middle latitude magnetic observatories.  Boulder reported a SI value of 12
nT.  The sudden impulse occurred at 20:25 UT.  The source of this sudden
impulse is unclear at this time.  The field is expected to continue mostly
unsettled to quiet, with isolated active periods possible over the higher
latitudes.

     HF propagation conditions were normal over all regions.  Similar
conditions are expected over the next 24 hours.


**  End of Daily Update  **
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