[Finalsolar] Daily Summary of Solar Geophysical Activity for 23 April

[Semi-finalized daily report of solar and geophysical activity.]

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                 DAILY SUMMARY OF SOLAR GEOPHYSICAL ACTIVITY

                                 23 APRIL, 2008

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                  (Based In-Part On SESC Observational Data)


SOLAR AND GEOPHYSICAL ACTIVITY INDICES FOR 23 APRIL, 2008
---------------------------------------------------------

NOTE: The background x-ray flux was below class A1.0 levels.
!!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 114, 04/23/08
10.7 FLUX=071.0  90-AVG=072        SSN=013      BKI=3354 4534  BAI=027
BGND-XRAY=A1.0     FLU1=*.*E+**  FLU10=*.*E+**  PKI=3454 4554  PAI=032
  BOU-DEV=***,***,***,***,***,***,***,***   DEV-AVG=*** NT     SWF=00:000
 XRAY-MAX= A6.0   @ 1334UT    XRAY-MIN= A1.3   @ 1345UT   XRAY-AVG= A1.0
NEUTN-MAX= +000%  @ 0000UT   NEUTN-MIN= +000%  @ 0000UT  NEUTN-AVG= +0.0%
  PCA-MAX= +0.0DB @ 0000UT     PCA-MIN= +0.0DB @ 0000UT    PCA-AVG= +0.0DB
BOUTF-MAX=00000NT @ 0000UT   BOUTF-MIN=00000NT @ 0000UT  BOUTF-AVG=00000NT
GOES9-MAX=N:+000NT@ 2359UT   GOES9-MIN=N:+000NT@ 2359UT  G9-AVG=+00,+00,+00
GOES8-MAX=N:+000NT@ 2359UT   GOES8-MIN=N:+000NT@ 2359UT  G8-AVG=+00,+00,+00
 FLUXFCST=STD:070,070,070;SESC:070,070,070 BAI/PAI-FCST=015,010,005/015,012,005
    KFCST=**** **** **** ****  27DAY-AP=031,021   27DAY-KP=6543 3245 5444 4333
 WARNINGS=
   ALERTS=
!!END-DATA!!

NOTE: The Effective Sunspot Number for 22 APR 08 is not available.
      The Full Kp Indices for 23 APR 08 are: 3+ 4- 5+ 4-   4+ 5o 5- 4- 
      The 3-Hr Ap Indices for 23 APR 08 are:  18  22  56  22  32  48  39  22 
      Greater than 2 MeV Electron Fluence for 23 APR is: 1.3E+07
      DRAO 10.7 cm Solar Flux at 18Z, 20Z, 22Z: N/A, N/A, N/A sfu.


SYNOPSIS OF ACTIVITY
--------------------

             Solar activity was very low. No flares occurred during
       the past 24 hours. Region 992 (N13W17) has been quiet and stable and
       is a small, simple C-type sunspot group.

            Solar activity forecast:  solar activity is expected to be very
       low.

            The geomagnetic field was initially unsettled but after 0300Z
       increased to predominantly active levels. In addition there were two
       minor storm periods; the first from 0600-0900Z and the second from
       1500-1800Z. Ace real-time solar wind data show a slow increase in
       solar wind speeds at the beginning of the period followed by a
       marked increase in speed and temperature around 0400Z. The magnetic
       field observations at ace also indicate a gradual increase as well
       as an extended period of mostly southward bz from 0200Z to about
       1700Z. The signatures are consistent with a co-rotating interaction
       region followed by a high speed solar wind stream. Solar wind speed
       remains elevated with values around 640 km/s at forecast issue time.

            Geophysical activity forecast:  the geomagnetic field is
       expected to be unsettled to active with a chance for isolated minor
       storm periods for the first day (24 april) as the high speed stream
       persists. Activity is expected to decline to predominantly unsettled
       for the second day (25 april) and to predominantly quiet for the
       third data (26 april).

            Event probabilities 24 apr-26 apr

                             Class M    01/01/01
                             Class X    01/01/01
                             Proton     01/01/01
                             PCAF       Green

            Geomagnetic activity probabilities 24 apr-26 apr

                        A.  Middle Latitudes
                        Active                45/35/10
                        Minor storm           20/10/05
                        Major-severe storm    10/05/01

                        B.  High Latitudes
                        Active                35/30/10
                        Minor storm           30/20/05
                        Major-severe storm    20/10/01


COPIES OF JOINT USAF/NOAA SEC SOLAR GEOPHYSICAL REPORTS
=======================================================

 Regions with Sunspots.  Locations Valid at 23/2400Z 
-----------------------------------------------------
Nmbr Location  Lo  Area  Z   LL   NN Mag Type
0992 N13W17   275  0040 Cso  04   03 Beta
0991 S10W24   282                    Plage
Regions Due to Return 24 Apr to 26 Apr
Nmbr Lat    Lo
None


LISTING OF SOLAR ENERGETIC EVENTS FOR 23 APRIL, 2008
----------------------------------------------------
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
None


**  End of Daily Report  **