home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Shareware Overload
/
ShartewareOverload.cdr
/
database
/
bcast100.zip
/
SGDBS.ZIP
/
91-10-22.DLY
< prev
next >
Wrap
Text File
|
1991-10-22
|
5KB
|
90 lines
/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
DAILY SUMMARY OF SOLAR GEOPHYSICAL ACTIVITY
22 OCTOBER, 1991
/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
(Based In-Part On SESC Observational Data)
SOLAR AND GEOPHYSICAL ACTIVITY INDICES FOR 22 OCTOBER
-----------------------------------------------------
!!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 295, 10/22/91
10.7 FLUX=184.5 90-AVG=195 SSN=131 BKI=3345 3333 BAI=020
BGND-XRAY=C1.6 FLU1=*.*E*** FLU10=5.3E+03 PKI=3344 3332 PAI=018
BOU-DEV=037,037,062,078,024,027,021,020 DEV-AVG=038 NT SWF=02:072
XRAY-MAX= M1.9 @ 1902UT XRAY-MIN= C1.4 @ 1731UT XRAY-AVG= C3.2
NEUTN-MAX= +003% @ 2305UT NEUTN-MIN= -002% @ 2205UT NEUTN-AVG= +0.1%
PCA-MAX= +0.2DB @ 1030UT PCA-MIN= -0.2DB @ 2355UT PCA-AVG= +0.0DB
BOUTF-MAX=55305NT @ 0421UT BOUTF-MIN=55262NT @ 1904UT BOUTF-AVG=55286NT
GOES7-MAX=E:+124NT@ 0230UT GOES7-MIN=N:-028NT@ 0651UT G7-AVG=+075,+056,+005
GOES6-MAX=P:+123NT@ 2205UT GOES6-MIN=E:-030NT@ 0606UT G6-AVG=+084,+000,+025
FLUXFCST=STD:190,195,195;SESC:195,200,200 BAI/PAI-FCST=025,025,025/030,030,025
KFCST=4456 4444 4456 4444 27DAY-AP=036,038 27DAY-KP=5455 4344 5555 4443
WARNINGS=*GSTRM;*AURMIDWRN
ALERTS=**MINFLR:M1.2@0644;**MINFLR:M1.9@1902
!!END-DATA!!
BRIEF SUMMARY OF EVENTS
-----------------------
Solar energetic activity increased substantially today. Moderate levels
of activity were observed from new Region 6891 (S10E73). The appearance of
this apparently complex region was heralded by a respectable increase in the
10.7 cm solar radio flux.
Region 6891 is a large and impressive region in both H-alpha and
white-light. It produced two M-class flares today: a class M1.2/1F flare at
06:44 UT and a class M1.9/1N event at 19:02 UT. Region 6891 is the return of
old Region 6850, which also spawned many energetic events prior to its
departure two weeks ago. This region is definitely capable of producing
minor M-class flares. There is also a slight chance for an isolated major
flare from this region, although a quantitative analysis is not yet possible
due to the proximity of this region to the solar limb.
New Region 6892 (S17E74) also rotated into view today, which appears to
be the remnants of old Region 6853. Old Region 6853 was also a very
productive flare producer. These characteristics may still be present in
Region 6892.
Several small flares associated with loop prominence systems were noted
from Region 6891. Also of note was a persistent high-altitude prominence on
the northwest limb associated with a recently departed region.
Solar activity is expected to remain moderate over the next several days
at least, with a slight chance for an isolated major event from Region 6891.
The geomagnetic field has been mostly unsettled to active today. Brief
periods of minor storming were observed over several middle latitude
stations. High latitudes experienced stronger activity with periods of minor
to major storming during the local evening and early morning hours.
Conditions should continue at active to possibly weak minor storm levels over
the middle latitudes over the next 24 hours. The 24th or 25th of October
should produce the most active conditions. There is a chance a minor
geomagnetic storm may develop over the next 24 to 72 hours. No significant
storming is anticipated.
Auroral activity was low to moderate over the northerly middle to
central middle latitudes. Lunar phase significantly hampered attempts to
view activity. However, high latitudes witnessed periods of intense auroral
storming associated with the evening and early morning geomagnetic substorms.
Auroral activity should continue at mostly moderate levels with possible
sporadic periods of high activity over the high latitude regions during the
local evening and early morning hours.
HF propagation conditions ranged from below normal to above normal
today. The quality of propagation was fairly location-dependent. Many
low and middle latitude regions experienced above normal propagation
conditions today with enhanced MUFs well above 30 to 35 MHz. Other locations
experienced degradations with increased noise and fading. Conditions should
remain approximately normal to slightly below normal over the next 24 to 72
hours. High latitude regions should remain below normal throughout the
period.
** End of Daily Update **