home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Shareware Overload
/
ShartewareOverload.cdr
/
database
/
bcast100.zip
/
SGDBS.ZIP
/
91-11-01.DLY
< prev
next >
Wrap
Text File
|
1991-11-02
|
5KB
|
95 lines
/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
DAILY SUMMARY OF SOLAR GEOPHYSICAL ACTIVITY
01 NOVEMBER, 1991
/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
(Based In-Part On SESC Observational Data)
SOLAR AND GEOPHYSICAL ACTIVITY INDICES FOR 01 NOVEMBER
------------------------------------------------------
!!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 305, 11/01/91
10.7 FLUX=230.2 90-AVG=197 SSN=274 BKI=5356 6655 BAI=055
BGND-XRAY=C1.4 FLU1=*.*E*** FLU10=3.4E+04 PKI=5455 6676 PAI=072
BOU-DEV=085,021,091,151,170,155,076,083 DEV-AVG=104 NT SWF=01:009
XRAY-MAX= M1.4 @ 2029UT XRAY-MIN= C1.2 @ 1229UT XRAY-AVG= C2.3
NEUTN-MAX= +000% @ 2355UT NEUTN-MIN= -009% @ 0640UT NEUTN-AVG= -4.3%
PCA-MAX= +0.1DB @ 2010UT PCA-MIN= -0.5DB @ 1700UT PCA-AVG= -0.1DB
BOUTF-MAX=55345NT @ 2106UT BOUTF-MIN=55211NT @ 1207UT BOUTF-AVG=55281NT
GOES7-MAX=P:+156NT@ 2105UT GOES7-MIN=P:-141NT@ 1530UT G7-AVG=+056,+053,-011
GOES6-MAX=P:+208NT@ 2105UT GOES6-MIN=P:-088NT@ 2003UT G6-AVG=+083,+014,+013
FLUXFCST=STD:223,210,190;SESC:220,210,195 BAI/PAI-FCST=040,025,020/065,040,025
KFCST=3467 5445 4445 5434 27DAY-AP=020,023 27DAY-KP=1123 3545 5444 3332
WARNINGS=*MAJFLR;*PROTFLR;*PROTON;*PCA;*GSTRM;*AURMIDWRN;*AURLOWWCH
ALERTS=**MINFLR:M1.4@2029;**FORBUSH;**MAJSTRM
!!END-DATA!!
BRIEF SUMMARY OF EVENTS
-----------------------
Solar activity was moderate today. Region 6891 (S11W60) was responsible
for most of the minor flare activity observed today, including a class
M1.4/SF flare at 20:29 UT. This region continued to show decay, but at a
less rapid rate. Despite this, the area is still very complex and potent
magnetically and may yet generate another major flare before it departs the
west limb early on 04 November. Until then, the possibility for related
proton activity remains high enough to warrant proton and PCA warnings.
Regions 6892 (S18W59) and 6893 (N17W38) also produced numerous C-class
subflares today. Both of these areas seemed to show a minor amount of decay
today although they remain capable of continuing their production of minor
M-class events. There is also a slight chance for an isolated minor M-class
flare from one of these regions.
Strong Calcium XV emissions were observed on the southeast limb today
associated with the arrival of new Region 6905 (S08E75). This region may
have been responsible for producing the recent optically uncorrelated minor
M-class x-ray flares. Strong Calcium XV emissions were also noted on the
southwest limb where Region 6891 is now approaching.
The geomagnetic field ranged from unsettled to severe storm levels
today. Most of the severe storming was confined to the high latitude
regions. Elsewhere, major geomagnetic storming was frequently observed. The
GOES-6 and GOES-7 spacecraft experienced magnetopause crossings during the
day today. GOES-7 was affected for the longest period of time, between
15:27 UT and 16:17 UT. At 20:02 UT, both spacecraft observed simultaneous
crossings.
Conditions should remain at minor to major storm levels over the next 24
hours. Conditions should gradually decay during the UT day of 02 November.
By 03 November, predominantly active conditions are anticipated with possible
periods of minor storming during the local evening and early morning hours.
This activity is thought to be related to the last X2.5/3B flare from Region
6891 as well as a possible influential well placed coronal hole just to the
east of Region 6891.
Auroral activity began the day at mostly moderate levels. Nothing too
energetic was observed until after 10:00 UT when geomagnetic and auroral
activity became significantly enhanced. Conditions have now become
sporadically stormy. Substorm periods should continue to diminish in
frequency and duration over the next 24 hours as the storm abates.
Observations of auroral activity are expected primarily over the middle and
high latitude regions (primarily the northerly middle and high latitude
regions).
HF propagation conditions were below normal today over all areas.
Middle latitudes experienced significant degradations in signal qualities.
Reports of occassional signal blackouts were also received from many latitude
regions. Lower latitudes were not as strongly affected, but nevertheless
witnessed increased levels of noise and fading throughout the UT day.
Conditions are expected to remain below normal for 02 November. More notable
improvements are anticipated for 03 November. Conditions may return to near-
normal by 04 and/or 05 November.
Next week, we will begin entering the quieter sector of the space
environment which should return us to much more favorable and stabler
conditions for HF radio propagation.
** End of Daily Update **