:Product: Report of Solar-Geophysical Activity
:Issued: 2000 Apr 25 2200 UT
# Prepared jointly by the U.S. Dept. of Commerce, NOAA,
#Space Environment Center and the U.S. Air Force.
#
JOINT USAF/NOAA REPORT OF SOLAR AND GEOPHYSICAL ACTIVITY
SDF NUMBER 116 ISSUED AT 2200Z ON 25 APR 2000
IA.  ANALYSIS OF SOLAR ACTIVE REGIONS AND ACTIVITY FROM  24/2100Z
TO 25/2100Z:  SOLAR ACTIVITY CONTINUED LOW. MOST OF THE ACTIVITY
ORIGINATED IN REGION 8972 (N34W47). REGIONS 8970 (S15E18) AND 8971
(N18E16) REMAIN IMPRESSIVE IN WHITE LIGHT AND H-ALPHA, BUT AS YET
HAVE BEEN LARGELY UNPRODUCTIVE. LITTLE ELSE OF SIGNIFICANCE
OCCURRED.
IB.  SOLAR ACTIVITY FORECAST:  SOLAR ACTIVITY IS EXPECTED TO BE LOW
TO MODERATE. AN ISOLATED M-CLASS EVENT MAY ORIGINATE FROM EITHER
REGION 8970, 8971 OR 8972.
IIA.  GEOPHYSICAL ACTIVITY SUMMARY FROM 24/2100Z TO 25/2100Z:
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED.
IIB.  GEOPHYSICAL ACTIVITY FORECAST:  THE GEOMAGNETIC FIELD IS
EXPECTED TO BE UNSETTLED THROUGHOUT THE PERIOD.
III.  EVENT PROBABILITIES 26 APR-28 APR
CLASS M    30/30/30
CLASS X    01/01/01
PROTON     01/01/01
PCAF       GREEN
IV.  PENTICTON 10.7 CM FLUX
OBSERVED           25 APR 203
PREDICTED   26 APR-28 APR  205/205/200
90 DAY MEAN        25 APR 186
V.  GEOMAGNETIC A INDICES
OBSERVED AFR/AP 24 APR  014/021
ESTIMATED AFR/AP 25 APR  005/009
PREDICTED AFR/AP 26 APR-28 APR  010/015-010/012-010/010
VI.  GEOMAGNETIC ACTIVITY PROBABILITIES 26 APR-28 APR
A.  MIDDLE LATITUDES
ACTIVE                20/20/20
MINOR STORM           05/05/05
MAJOR-SEVERE STORM    01/01/01
B.  HIGH LATITUDES
ACTIVE                30/30/30
MINOR STORM           05/05/05
MAJOR-SEVERE STORM    01/01/01