Xref: news.cs.tut.fi rec.radio.amateur.misc:50735 rec.radio.shortwave:30474 rec.radio.info:4869 Lines: 164 Subject: Daily Summary of Solar Geophysical Activity for 25 April Followup-To: rec.radio.amateur.misc,rec.radio.shortwave Approved: rec-radio-info@ve6mgs.ampr.ab.ca Path: news.cs.tut.fi!news.funet.fi!news.eunet.fi!EU.net!howland.reston.ans.net!agate!library.ucla.edu!news.mic.ucla.edu!unixg.ubc.ca!quartz.ucs.ualberta.ca!alberta!ve6mgs!usenet Date: Mon, 25 Apr 1994 22:18:59 MDT From: oler@rho.uleth.ca (Cary Oler) Newsgroups: rec.radio.amateur.misc,rec.radio.shortwave,rec.radio.info Message-ID: <9404260419.AA19412@rho.uleth.ca> /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ DAILY SUMMARY OF SOLAR GEOPHYSICAL ACTIVITY 25 APRIL, 1994 /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ (Based In-Part On SESC Observational Data) SOLAR AND GEOPHYSICAL ACTIVITY INDICES FOR 25 APRIL, 1994 --------------------------------------------------------- !!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 115, 04/25/94 10.7 FLUX=082.8 90-AVG=092 SSN=060 BKI=2221 1222 BAI=006 BGND-XRAY=A4.9 FLU1=1.7E+06 FLU10=1.5E+04 PKI=2221 1223 PAI=007 BOU-DEV=010,018,017,007,009,016,018,019 DEV-AVG=014 NT SWF=00:000 XRAY-MAX= B2.3 @ 2340UT XRAY-MIN= A3.7 @ 0243UT XRAY-AVG= A6.4 NEUTN-MAX= +003% @ 1840UT NEUTN-MIN= -002% @ 0945UT NEUTN-AVG= +0.4% PCA-MAX= +0.2DB @ 0140UT PCA-MIN= -0.9DB @ 1445UT PCA-AVG= -0.0DB BOUTF-MAX=55333NT @ 1341UT BOUTF-MIN=55301NT @ 1705UT BOUTF-AVG=55324NT GOES7-MAX=P:+000NT@ 0000UT GOES7-MIN=N:+000NT@ 0000UT G7-AVG=+075,+000,+000 GOES6-MAX=P:+127NT@ 1814UT GOES6-MIN=N:-088NT@ 0457UT G6-AVG=+095,+026,-035 FLUXFCST=STD:120,120,115;SESC:120,120,115 BAI/PAI-FCST=010,010,010/012,015,015 KFCST=2233 4222 2334 4322 27DAY-AP=006,012 27DAY-KP=2122 2122 1114 3333 WARNINGS= ALERTS= !!END-DATA!! NOTE: The Effective Sunspot Number for 24 APR 94 was 33.6. The Full Kp Indices for 24 APR 94 are: 2o 2+ 3- 3- 2o 2+ 1+ 2- The 3-Hr Ap Indices for 24 APR 94 are: 8 10 11 12 8 10 5 7 Greater than 2 MeV Electron Fluence for 25 APR is: 2.8E+07 SYNOPSIS OF ACTIVITY -------------------- Solar activity was very low. Only three weak B-class x-ray events were observed this period. All regions are in decay. Solar activity forecast: solar activity is expected to be very low. The geomagnetic field has been at quiet to unsettled levels the past 24 hours. Geophysical activity forecast: the geomagnetic field is expected to be quiet to unsettled for the next three days. Event probabilities 26 apr-28 apr Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green Geomagnetic activity probabilities 26 apr-28 apr A. Middle Latitudes Active 15/15/15 Minor Storm 10/10/10 Major-Severe Storm 05/05/05 B. High Latitudes Active 15/15/20 Minor Storm 10/10/15 Major-Severe Storm 05/05/05 HF propagation conditions were normal over all regions. No significant changes are expected over the next 72 hours, through 28 April inclusive. COPIES OF JOINT USAF/NOAA SESC SOLAR GEOPHYSICAL REPORTS ======================================================== REGIONS WITH SUNSPOTS. LOCATIONS VALID AT 25/2400Z APRIL -------------------------------------------------------- NMBR LOCATION LO AREA Z LL NN MAG TYPE 7701 N07W69 120 0080 HSX 02 001 ALPHA 7702 S12W57 108 0000 AXX 01 001 ALPHA 7704 N07E01 050 0000 AXX 01 002 ALPHA 7705 N04W41 092 0070 CSO 05 004 BETA 7706 N06W89 140 0000 AXX 01 002 ALPHA REGIONS DUE TO RETURN 26 APRIL TO 28 APRIL NMBR LAT LO NONE LISTING OF SOLAR ENERGETIC EVENTS FOR 25 APRIL, 1994 ---------------------------------------------------- BEGIN MAX END RGN LOC XRAY OP 245MHZ 10CM SWEEP NONE POSSIBLE CORONAL MASS EJECTION EVENTS FOR 25 APRIL, 1994 -------------------------------------------------------- BEGIN MAX END LOCATION TYPE SIZE DUR II IV NO EVENTS OBSERVED INFERRED CORONAL HOLES. LOCATIONS VALID AT 25/2400Z --------------------------------------------------- ISOLATED HOLES AND POLAR EXTENSIONS EAST SOUTH WEST NORTH CAR TYPE POL AREA OBSN 77 N29W21 N07W31 N10W36 N29W21 077 ISO POS 004 10830A 78 S85E86 S85E86 S26E20 S15E25 019 EXT NEG 011 10830A SUMMARY OF FLARE EVENTS FOR THE PREVIOUS UTC DAY ------------------------------------------------ Date Begin Max End Xray Op Region Locn 2695 MHz 8800 MHz 15.4 GHz ------ ---- ---- ---- ---- -- ------ ------ --------- --------- --------- 24 Apr: 0227 0231 0238 B1.7 1213 1214 1216 B1.3 SF 7706 N07W67 1920 1929 1935 B1.1 2016 2021 2029 B1.9 2144 2148 2156 B1.6 SF 7706 N08W72 REGION FLARE STATISTICS FOR THE PREVIOUS UTC DAY ------------------------------------------------ C M X S 1 2 3 4 Total (%) -- -- -- -- -- -- -- -- --- ------ Region 7706: 0 0 0 2 0 0 0 0 002 (40.0) Uncorrellated: 0 0 0 0 0 0 0 0 003 (60.0) Total Events: 005 optical and x-ray. EVENTS WITH SWEEPS AND/OR OPTICAL PHENOMENA FOR THE LAST UTC DAY ---------------------------------------------------------------- Date Begin Max End Xray Op Region Locn Sweeps/Optical Observations ------ ---- ---- ---- ---- -- ------ ------ --------------------------- NO EVENTS OBSERVED. NOTES: All times are in Universal Time (UT). Characters preceding begin, max, and end times are defined as: B = Before, U = Uncertain, A = After. All times associated with x-ray flares (ex. flares which produce associated x-ray bursts) refer to the begin, max, and end times of the x-rays. Flares which are not associated with x-ray signatures use the optical observations to determine the begin, max, and end times. Acronyms used to identify sweeps and optical phenomena include: II = Type II Sweep Frequency Event III = Type III Sweep IV = Type IV Sweep V = Type V Sweep Continuum = Continuum Radio Event Loop = Loop Prominence System, Spray = Limb Spray, Surge = Bright Limb Surge, EPL = Eruptive Prominence on the Limb. ** End of Daily Report **