home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Shareware Overload
/
ShartewareOverload.cdr
/
database
/
bcast100.zip
/
SGDBS.ZIP
/
91-10-15.DLY
< prev
next >
Wrap
Text File
|
1991-10-15
|
3KB
|
71 lines
/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
DAILY SUMMARY OF SOLAR GEOPHYSICAL ACTIVITY
15 OCTOBER, 1991
/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
(Based In-Part On SESC Observational Data)
SOLAR AND GEOPHYSICAL ACTIVITY INDICES FOR 15 OCTOBER
-----------------------------------------------------
!!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 288, 10/15/91
10.7 FLUX=178.7 90-AVG=198 SSN=193 BKI=1120 0222 BAI=004
BGND-XRAY=B8.4 FLU1=5.2E+05 FLU10=8.9E+03 PKI=2112 2221 PAI=006
BOU-DEV=009,009,013,003,003,012,011,013 DEV-AVG=009 NT SWF=02:011
XRAY-MAX= M1.4 @ 0704UT XRAY-MIN= B6.7 @ 2343UT XRAY-AVG= C1.7
NEUTN-MAX= +004% @ 2200UT NEUTN-MIN= -002% @ 2330UT NEUTN-AVG= +0.8%
PCA-MAX= +0.2DB @ 0155UT PCA-MIN= -3.5DB @ 1815UT PCA-AVG= -0.5DB
BOUTF-MAX=55309NT @ 1334UT BOUTF-MIN=55281NT @ 1815UT BOUTF-AVG=55298NT
GOES7-MAX=P:+128NT@ 2009UT GOES7-MIN=N:-003NT@ 0111UT G7-AVG=+080,+039,+005
GOES6-MAX=P:+144NT@ 2010UT GOES6-MIN=E:-018NT@ 0633UT G6-AVG=+092,-004,+022
FLUXFCST=STD:180,180,180;SESC:180,180,180 BAI/PAI-FCST=010,010,007/015,015,010
KFCST=2333 3322 2333 3322 27DAY-AP=011,011 27DAY-KP=2224 3322 2333 3221
WARNINGS=*MAJFLR
ALERTS=**MINFLR:M1.3@0131;**MINFLR:M1.4@0704
!!END-DATA!!
BRIEF SUMMARY OF EVENTS
-----------------------
Solar activity became moderate today. Region 6878 (S21E16) produced two
M-class flares: a class M1.3/1N event at 01:31 UT and a class M1.4/1N event
at 07:04 UT. These were the only M-class events observed. Region 6879
(N22E50) was the next most active region, spawning several C-class subflares
during the day. Region 6878 has exhibited a minor amount of decay,
particularly in the trailer spot complex. Region 6879 experienced a small
amount of growth, but has been relatively stable all day.
Region 6873 (S23W19) continued to very gradually decay today. The
leader spot complex was the area which experienced the greatest amount of
decay. Nevertheless, this region is still the largest and most complex
region visible.
All of Regions 6873, 6878 and 6879 are capable of spawning M-class
flares. They also may be capable of producing another isolated major flare,
although there is some uncertainty regarding this potential. If another
major event does occur, it will likely be rather impulsive and not very
geoeffective.
The geomagnetic field has been quiet today. Conditions should remain
mostly unsettled over the next 48 hours. The coronal hole may not be as
effective in enhancing geomagnetic and auroral activity as was first noted.
Recent evidence suggests the coronal hole may not produce very much
geomagnetic activity at all. High latitudes may experience unsettled to
active levels of geomagnetic activity during the local evening and early
morning hours. Other than that, conditions should remain fairly stable over
the next 72 hours.
HF propagation conditions have been normal to above normal throughout
the UT day. Several reports of solid 10 meter openings to Europe during the
local morning hours over the last several days have been received.
Conditions should remain similar over the next 2 to 3 days. No significant
degradations are anticipated at this time.
** End of Daily Update **