:Product: 20000609SGAS.txt
:Issued: 2000 Jun 09 0245 UTC
# Prepared jointly by the U.S. Dept. of Commerce, NOAA,
# Space Environment Center and the U.S. Air Force.
#
JOINT USAF/NOAA SOLAR AND GEOPHYSICAL ACTIVITY SUMMARY
SGAS NUMBER 161 ISSUED AT 0245Z ON 09 JUN 2000
THIS REPORT IS COMPILED FROM DATA RECEIVED AT SWO ON 08 JUN
A.  ENERGETIC EVENTS
BEGIN  MAX  END  RGN   LOC   XRAY  OP 245MHZ 10CM   SWEEP
0052 0104 0122              C4.7     950    26
0810 0811 0818                       200
0855 0856 0856                       120
1739 1739 1740                       170
1903 1904 1905                       450
B.  PROTON EVENTS:  THE GREATER THAN 10 MEV PROTON FLUX AT
GEOSYNCHRONOUS ORBIT REMAINED ABOVE THRESHOLD VALUES THROUGHOUT THE
PERIOD.  FLUX PEAKED AT 84 PFU'S AT 08/0940Z, AND DECREASED TO ABOUT
14 PFU BY END PERIOD.
C.  GEOMAGNETIC ACTIVITY SUMMARY:  THE GEOMAGNETIC FIELD WAS AT
UNSETTLED TO SEVERE STORM LEVELS.  A SUDDEN IMPULSE OCCURRED AT
08/0909Z (77 NT, AS MEASURED BY THE BOULDER USGS MAGNETOMETER) AS A
RESULT OF SHOCK ARRIVAL MEASUED AT THE ACE SPACECRAFT, WHERE SOLAR
WIND VELOCITY JUMPED FROM 520 TO OVER 800 KM/S AT 08/0841Z AND BZ
DROPPED TO ABOUT -20NT.  MINOR TO SEVERE STORM LEVELS WERE OBSERVED
FOLLOWING THE SHOCK ARRIVAL.  THIS SHOCK IS PRESUMED TO BE RELATED
TO THE X2/3B EVENT ON 06 JUNE.
D.  STRATWARM:  NONE
E.  DAILY INDICES: (REAL-TIME PRELIMINARY/ESTIMATED VALUES)
10 CM 175  SSN 203  AFR/AP 034/053   X-RAY BACKGROUND C1.3
DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS)
GT 1 MEV 3.1E+08   GT 10 MEV 3.5E+06 P/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
DAILY ELECTRON FLUENCE
GT 2 MEV 1.00E+07 E/(CM2-STER-DAY)
(GOES-8 SATELLITE SYNCHRONOUS ORBIT W75 DEGREES)
3 HOUR K-INDICES:
BOULDER 3 3 3 5 5 5 4 3 PLANETARY 3 4 4 7 7 6 5 4
F.  COMMENTS:  A MODERATE (7.4 PERCENT) FORBUSH DECREASE PEAKED NEAR
08/1449Z.  A MAGNETOPAUSE CROSSING WAS OBSERVED ON GOES-8 (W075)
BEGAN AT 08/1510Z AND CONTINUED UNTIL APPROXIMATELY 08/1615Z.