Xref: news.cs.tut.fi rec.radio.amateur.misc:52292 rec.radio.shortwave:31475 rec.radio.info:5121 Lines: 166 Subject: Daily Summary of Solar Geophysical Activity for 25 May 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!sunic!EU.net!howland.reston.ans.net!gatech!newsfeed.pitt.edu!nntp.club.cc.cmu.edu!news.mic.ucla.edu!unixg.ubc.ca!quartz.ucs.ualberta.ca!alberta!ve6mgs!usenet Date: Wed, 25 May 1994 21:24:14 MDT From: oler@rho.uleth.ca (Cary Oler) Newsgroups: rec.radio.amateur.misc,rec.radio.shortwave,rec.radio.info Message-ID: <9405260324.AA22108@rho.uleth.ca> /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ DAILY SUMMARY OF SOLAR GEOPHYSICAL ACTIVITY 25 MAY, 1994 /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ (Based In-Part On SESC Observational Data) SOLAR AND GEOPHYSICAL ACTIVITY INDICES FOR 25 MAY, 1994 ------------------------------------------------------- !!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 145, 05/25/94 10.7 FLUX=074.2 90-AVG=085 SSN=012 BKI=3544 2324 BAI=021 BGND-XRAY=A2.9 FLU1=1.7E+06 FLU10=1.4E+04 PKI=3544 2324 PAI=020 BOU-DEV=037,081,052,052,018,022,010,044 DEV-AVG=039 NT SWF=00:000 XRAY-MAX= A6.9 @ 0156UT XRAY-MIN= A1.5 @ 2031UT XRAY-AVG= A4.0 NEUTN-MAX= +001% @ 2225UT NEUTN-MIN= -003% @ 1045UT NEUTN-AVG= -0.5% PCA-MAX= +0.1DB @ 2350UT PCA-MIN= -0.4DB @ 0050UT PCA-AVG= +0.0DB BOUTF-MAX=55333NT @ 2140UT BOUTF-MIN=55284NT @ 1719UT BOUTF-AVG=55315NT GOES7-MAX=P:+000NT@ 0000UT GOES7-MIN=N:+000NT@ 0000UT G7-AVG=+074,+000,+000 GOES6-MAX=P:+130NT@ 1825UT GOES6-MIN=N:-113NT@ 0507UT G6-AVG=+101,+032,-037 FLUXFCST=STD:074,074,072;SESC:074,074,072 BAI/PAI-FCST=015,010,010/015,010,020 KFCST=3325 4223 3324 4223 27DAY-AP=004,006 27DAY-KP=1111 2111 1231 1013 WARNINGS= ALERTS= !!END-DATA!! NOTE: The Effective Sunspot Number for 24 MAY 94 was 45.2. The Full Kp Indices for 24 MAY 94 are: 3+ 5- 4+ 3+ 3- 3- 3- 3o The 3-Hr Ap Indices for 24 MAY 94 are: 18 37 35 20 11 12 14 16 Greater than 2 MeV Electron Fluence for 25 MAY is: 2.3E+07 SYNOPSIS OF ACTIVITY -------------------- Solar activity was very low. New Region 7728 (S07E52) was numbered. Solar activity forecast: solar activity is expected to be very low. The geomagnetic field was unsettled to active for most of the past 24 hours. Storm conditions occurred from 25/0300-0600Z. The greater than 2 MeV electron flux was moderate since about 25/0900Z. Geophysical activity forecast: the geomagnetic field is expected to range from quiet to active for most of the forecast period. Effects of a recurrent disturbance may be seen by the end of the third day. Event probabilities 26 may-28 may Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF Green Geomagnetic activity probabilities 26 may-28 may A. Middle Latitudes Active 30/15/30 Minor Storm 15/05/25 Major-Severe Storm 10/05/15 B. High Latitudes Active 30/15/30 Minor Storm 15/05/25 Major-Severe Storm 10/05/15 HF propagation conditions continued normal over all regions except the high latitude paths during the local night sectors where periodic minor signal degradation occurred. Near-normal conditions should persist over the next 72 hours. COPIES OF JOINT USAF/NOAA SESC SOLAR GEOPHYSICAL REPORTS ======================================================== REGIONS WITH SUNSPOTS. LOCATIONS VALID AT 25/2400Z MAY ------------------------------------------------------ NMBR LOCATION LO AREA Z LL NN MAG TYPE 7728 S07E52 323 0010 BXO 03 002 BETA 7727 N08W39 054 PLAGE REGIONS DUE TO RETURN 26 MAY TO 28 MAY NMBR LAT LO NONE LISTING OF SOLAR ENERGETIC EVENTS FOR 25 MAY, 1994 -------------------------------------------------- BEGIN MAX END RGN LOC XRAY OP 245MHZ 10CM SWEEP NONE POSSIBLE CORONAL MASS EJECTION EVENTS FOR 25 MAY, 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 NO DATA AVAILABLE FOR ANALYSIS 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 May: 0107 0112 0115 B1.2 0628 0632 0638 B1.4 0645 0651 0655 B7.3 1148 1151 1154 B1.0 1715 1719 1722 B1.4 1808 1813 1817 B3.0 SF 7727 N09W23 2000 2007 2011 B1.6 REGION FLARE STATISTICS FOR THE PREVIOUS UTC DAY ------------------------------------------------ C M X S 1 2 3 4 Total (%) -- -- -- -- -- -- -- -- --- ------ Region 7727: 0 0 0 1 0 0 0 0 001 (14.3) Uncorrellated: 0 0 0 0 0 0 0 0 006 (85.7) Total Events: 007 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 **