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- DAILY SUMMARY OF SOLAR GEOPHYSICAL ACTIVITY
-
- 23 OCTOBER, 1991
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- (Based In-Part On SESC Observational Data)
-
-
- SOLAR AND GEOPHYSICAL ACTIVITY INDICES FOR 23 OCTOBER
- -----------------------------------------------------
-
- !!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 296, 10/23/91
- 10.7 FLUX=194 90-AVG=194 SSN=154 BKI=2333 2244 BAI=015
- BGND-XRAY=C1.5 FLU1=*.*E*** FLU10=6.5E+03 PKI=2232 3345 PAI=019
- BOU-DEV=013,022,025,022,010,016,045,045 DEV-AVG=024 NT SWF=00:000
- XRAY-MAX= C6.7 @ 0804UT XRAY-MIN= C1.3 @ 1339UT XRAY-AVG= C2.4
- NEUTN-MAX= +004% @ 1910UT NEUTN-MIN= -001% @ 2245UT NEUTN-AVG= +1.0%
- PCA-MAX= +0.5DB @ 2215UT PCA-MIN= -1.2DB @ 1540UT PCA-AVG= +0.0DB
- BOUTF-MAX=55304NT @ 1358UT BOUTF-MIN=55260NT @ 1931UT BOUTF-AVG=55290NT
- GOES7-MAX=P:+150NT@ 1800UT GOES7-MIN=N:-018NT@ 0759UT G7-AVG=+073,+048,+005
- GOES6-MAX=P:+161NT@ 1957UT GOES6-MIN=E:-047NT@ 0737UT G6-AVG=+087,-008,+022
- FLUXFCST=STD:200,205,210;SESC:200,205,210 BAI/PAI-FCST=020,020,010/015,015,010
- KFCST=2344 5433 2344 5433 27DAY-AP=038,033 27DAY-KP=5555 4443 4444 4454
- WARNINGS=*GSTRM;*AURMIDWCH
- ALERTS=
- !!END-DATA!!
-
- PLEASE NOTE:
- The 1 MeV proton fluence data will be unavailable until further notice.
- Problems originate with hardware on the primary GOES-7 satellite. Proton
- fluence values for 10 MeV protons are correct and unaffected.
-
-
- BRIEF SUMMARY OF EVENTS
- -----------------------
-
- Solar activity was low on 23 October. Region 6891 (S12E62) has rotated
- into better view today and reveals itself to be an impressively complex and
- very large solar region. It has a beta-delta magnetic configuration and
- should be capable of producing major energetic activity.
-
- Region 6886 (N09E02) experienced rapid substantial growth in both
- white-light and H-alpha today, but did not produce any significant flare
- activity.
-
- NOTE: A major class X2.1/2B flare has erupted out of Region 6891 at 02:40 UT
- on 24 October. This event will be covered in more detail with the daily
- summary for 24 October.
-
- Solar activity is expected to be moderate to high. Region 6891 is
- extremely capable of producing at least minor M-class flares. It should also
- be capable of generating several major energetic events as it transits the
- solar disk.
-
- The geomagnetic field has been mostly quiet to unsettled over the last
- 24 hours. Activity became enhanced to active levels after 18:00 UT.
- Geomagnetic activity is expected to remain mostly unsettled to active. The
- probability for geomagnetic storming is fading. The recurrent coronal hole
- does not appear to be very geoeffective for this rotation.
-
- Auroral activity has been sporadically active. High latitudes have
- observed mostly low to moderate levels of activity. Lunar luminosity is
- preventing observations from the middle latitude regions.
-
- HF propagation conditions were normal over most regions today.
- Conditions should continue mostly normal over the next 24 to 48 hours. A
- moderate SID/SWF accompanied the major class X2.1/2B flare early in the UT
- day of 24 October. This event will be covered in more detail tommorrow.
-
-
- ** End of Daily Update **
-