:Product: 19980501SGAS.txt
:Issued: 1998 May 01 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 121 ISSUED AT 0245Z ON 01 MAY 1998
THIS REPORT IS COMPILED FROM DATA RECEIVED AT SWO ON 30 APR
A.  ENERGETIC EVENTS
BEGIN  MAX  END  RGN   LOC   XRAY  OP 245MHZ 10CM   SWEEP
0444 0444 0444                       170
1001 0000 2319                                        IV
1335 1338 1341              B3.1     110
1721 0000 0000                                        IV
1911 1912 1914                       630
2115 2125 2136  8210 S21E03 C6.6  2N
2121 2121 2122                              140
2144 2205 2302  8214 N24E49       SF 170
2259 2259 2259                       1200
2333 2333 2333                       110
B.  PROTON EVENTS:  A WEAK ENERGETIC PROTON (GT 10 MEV) ENHANCEMENT
BEGAN AT 30/0405Z. MAXIMUM FLUX WAS 2 PFU. THIS ENHANCEMENT IS
ATTRIBUTED TO THE M6/HALO CME OBSERVED ON 29 APR.
C.  GEOMAGNETIC ACTIVITY SUMMARY:  THE GEOMAGNETIC FIELD WAS QUIET
UNTIL A 31NT SUDDEN IMPULSE WAS OBSERVED AT 30/0933Z. THIS WAS
PRECEDED BY A SHOCK PASSAGE AT THE ACE SPACECRAFT AT 30/0845Z. AFTER
THE SUDDEN IMPULSE, UNSETTLED TO ACTIVE CONDITIONS WERE OBSERVED.
THIS DISTURBANCE IS BELIEVED TO BE RELATED TO THE X1/HALO CME
OBSERVED ON 27 APR. ENERGETIC ELECTRON FLUXES AT GEOSYNCHRONOUS
ORBIT WERE PREDOMINANTLY HIGH.
D.  STRATWARM:  NONE
E.  DAILY INDICES:
10 CM 103  SSN 074  AFR/AP 011/012   X-RAY BACKGROUND B3.3
DAILY PROTON FLUENCE (FLUX ACCUMULATION OVER 24 HRS)
GT 1 MEV 2.1E+07   GT 10 MEV 9.1E+04 P/(CM2-STER-DAY)
GOES-9 SATELLITE SYNCHRONOUS ORBIT W135 DEGREES)
DAILY ELECTRON FLUENCE
GT 2 MEV 2.70E+08 E/(CM2-STER-DAY)
GOES-9 SATELLITE SYNCHRONOUS ORBIT W135 DEGREES)
3 HOUR K-INDICES:
BOULDER 2 1 1 3 4 3 2 3 PLANETARY 2 1 1 3 4 4 3 3
F.  COMMENTS:  NONE