Xref: news.cs.tut.fi aus.radio:403 rec.radio.amateur.misc:50654 rec.radio.info:4862 Newsgroups: aus.radio,ips.solar.activity,rec.radio.amateur.misc,rec.radio.info Path: news.cs.tut.fi!news.funet.fi!sunic!trane.uninett.no!nac.no!ifi.uio.no!wabbit.cc.uow.edu.au!metro!ipso!rwc From: rwc@flare.syd.ips.oz.au (Regional Warning Centre) Subject: IPS Daily Report - 25 April 94 Message-ID: <1994Apr25.231232.29263@ips.oz.au> Followup-To: aus.radio,rec.radio.amateur.misc Sender: news@ips.oz.au (Usenet News) Nntp-Posting-Host: flare.syd.ips.oz.au Organization: IPS Radio and Space Services. Sydney, Australia. Date: Mon, 25 Apr 1994 23:12:32 GMT Approved: rec-radio-info@ve6mgs.ampr.ab.ca Lines: 90 SUBJ: IPS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 25/2330Z APRIL 1994 BY IPS RADIO AND SPACE SERVICES FROM THE REGIONAL WARNING CENTRE (RWC), SYDNEY. SUMMARY FOR 25 APRIL AND FORECAST UP TO 28 APRIL IPS Warning 12 will be issued later today for expected recurrent disturbance commencing April 28/29. ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity: very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number : 083/024 1B. SOLAR FORECAST 26 April 27 April 28 April Activity Low Very low Very low Fadeouts None expected None expected None expected Forecast 10.7 cm flux/Equivalent Sunspot Number : 081/022 1C. SOLAR COMMENT None. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field at Learmonth: quiet to unsettled Estimated Indices : A K Observed A Index 24 April Learmonth 07 3232 1111 Fredericksburg 06 08 Planetary 07 08 Observed Kp for 24 April: 2233 2212 2B. MAGNETIC FORECAST DATE Ap CONDITIONS 26 Apr 10 Quiet to unsettled. 27 Apr 10 Quiet to unsettled. 28 Apr 20 Unsettled to active. 2C. MAGNETIC COMMENT Recurrent geomagnetic activity expected to commence late on the 28th. The southern coronal hole which seems to be the cause of this lengthy activity is rounding the east limb of the Sun. Active to minor storm periods are expected 29 April - 1 May, with active periods up to 11 May. 3A. GLOBAL HF PROPAGATION SUMMARY LATITUDE BAND DATE LOW MIDDLE HIGH 25 Apr normal normal normal PCA Event : None. 3B. GLOBAL HF PROPAGATION FORECAST LATITUDE BAND DATE LOW MIDDLE HIGH 26 Apr normal normal fair 27 Apr normal normal fair 28 Apr normal fair poor 3C. GLOBAL HF PROPAGATION COMMENT Conditions expected to remain normal until April 28. Conditions at high latitudes are expected to detriorate after local night on the 28th. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY MUFs at Sydney were near predicted monthly values Observed T index for 25 April: 47 Predicted Monthly T Index for April is 40. 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST DATE T-index MUFs 26 Apr 45 Near predicted monthly values. 27 Apr 45 Near predicted monthly values. 28 Apr 45 Near predicted monthly values. 4C. AUSTRALIAN REGION COMMENT Degraded HF comms conditions expected after April 28. -- IPS Regional Warning Centre, Sydney |IPS Radio and Space Services email: rwc@ips.oz.au fax: +61 2 4148331 |PO Box 5606 RWC Duty Forecaster tel: +61 2 4148329 |West Chatswood NSW 2057 Recorded Message tel: +61 2 4148330 |AUSTRALIA