Date: Mon, 28 Feb 94 05:43:17 PST
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Subject: Info-Hams Digest V94 #219
To: Info-Hams
Info-Hams Digest Mon, 28 Feb 94 Volume 94 : Issue 219
Today's Topics:
Daily Summary of Solar Geophysical Activity for 25 February
Weekly Solar Terrestrial Forecast & Review for 25 February
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----------------------------------------------------------------------
Date: Fri, 25 Feb 1994 23:58:08 MST
From: ihnp4.ucsd.edu!swrinde!gatech!newsxfer.itd.umich.edu!nntp.cs.ubc.ca!alberta!ve6mgs!usenet@network.ucsd.edu
Subject: Daily Summary of Solar Geophysical Activity for 25 February
To: info-hams@ucsd.edu
/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
DAILY SUMMARY OF SOLAR GEOPHYSICAL ACT
25 FEBRUARY, 1994
/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
(Based In-Part On SESC Observational Data)
SOLAR AND GEOPHYSICAL ACT
------------------------------------------------------------
!!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 056, 02/25/94
10.7 FLUX=096.7 90-AVG=107 SSN=053 BKI=2243 2322 BAI=011
BGND-XRAY=B2.1 FLU1=4.0E+06 FLU10=1.9E+04 PKI=1254 2232 PAI=014
BOU-DEV=016,014,065,028,010,023,014,019 DEV-AVG=023 NT SWF=00:000
XRAY-MAX= C1.4 @ 0418UT XRAY-MIN= B1.6 @ 2328UT XRAY-AVG= B3.8
NEUTN-MAX= +002% @ 2100UT NEUTN-MIN= -004% @ 0325UT NEUTN-AVG= -0.3%
PCA-MAX= +0.3DB @ 1110UT PCA-MIN= -0.2DB @ 0955UT PCA-AVG= +0.1DB
BOUTF-MAX=55352NT @ 0642UT BOUTF-MIN=55314NT @ 1914UT BOUTF-AVG=55335NT
GOES7-MAX=P:+000NT@ 0000UT GOES7-MIN=N:+000NT@ 0000UT G7-AVG=+067,+000,+000
GOES6-MAX=P:+118NT@ 1848UT GOES6-MIN=N:-091NT@ 0815UT G6-AVG=+090,+038,-032
FLUXFCST=STD:095,095,095;SESC:095,095,095 BAI/PAI-FCST=010,008,008/010,008,008
KFCST=3223 4222 2223 4322 27DAY-AP=008,009 27DAY-KP=1233 3212 3123 3332
WARNINGS=
ALERTS=
!!END-DATA!!
NOTE: The Effective Sunspot Number for 24 FEB 94 was 38.5.
The Full Kp Indices for 24 FEB 94 are: 1o 1+ 1o 2- 2+ 1+ 2- 1-
The 3-Hr Ap Indices for 24 FEB 94 are: 4 5 4 6 10 5 7 3
Greater than 2 MeV Electron Fluence for 25 FEB is: 2.2E+08
SYNOPSIS OF ACT
--------------------
Solar activity was low. Only one C-class flare occurred
during the period which was not correlated optically with any
region. A 5 degree filament near S30E42 disappeared between
25/0027Z and 25/1421Z and an 11 degree filament disappeared
between 25/0810Z and 25/0824Z near N11W71. A new region was
assigned today as Region 7679 (N02E25).
STD: Moderate Ca XV emissions were observed on the northwest
limb from the same area which had extremely intense emissions
two weeks ago. A full-disk Yohkoh x-ray image has been
appended to this report showing the location of the enhanced
west-limb x-ray emissions and the associated location of the Ca
XV emissions.
Solar activity forecast: solar activity is expected to be
low.
The geomagnetic field has been at quiet to unsettled
levels for the past 24 hours. An isolated period of active
levels occurred during the nighttime sectors at mid-latitudes
with minor to major storm levels at high-latitudes.
Geophysical activity forecast: the geomagnetic field is
expected to be quiet to unsettled through the period.
Event probabilities 26 feb-28 feb
Class M 05/05/05
Class X 01/01/01
Proton 01/01/01
PCAF Green
Geomagnetic activity probabilities 26 feb-28 feb
A. Middle Latitudes
Active 15/15/15
Minor Storm 05/05/05
Major-Severe Storm 01/01/01
B. High Latitudes
Active 20/20/20
Minor Storm 10/10/10
Major-Severe Storm 05/05/05
HF propagation conditions were near-normal over all
regions. A brief period of enhanced activity between 06:00 and
12:00 UTC resulted in minor signal degradation for affected
high-latitude paths, although conditions improved to normal
thereafter. Normal propagation conditions will persist
throughout the next 72 hours, through 28 February inclusive.
COPIES OF JOINT USAF/NOAA SESC SOLAR GEOPHYSICAL REPORTS
========================================================
REGIONS WIT
-----------------------------------------------------------
NMBR LOCATION LO AREA Z LL NN MAG TYPE
7671 N11W82 191 0190 DAO 05 004 BET
7675 S11E03 106 0030 CSO 05 003 BET
7678 S15E62 047 0100 HSX 02 001 ALPHA
7679 N02E25 084 0010 BXO 03 005 BET
7674 S14W56 165 PLAGE
7676 N08E14 095 PLAGE
7677 N20W51 160 PLAGE
REGIONS DUE TO RET
NMBR LAT
7666 N18 350
LISTING OF SOLAR ENERGETIC EVENTS FOR 25 FEBRUARY, 1994
-------------------------------------------------------
BEGIN MAX END RGN LOC XRAY OP 245MHZ 10CM SWEEP
0216 0217 0217 140
POSSIBLE CORONAL MASS EJECTION EVENTS FOR 25 FEBRUARY, 1994
-----------------------------------------------------------
BEGIN MAX END LOCATION TYPE SIZE DUR II IV
25/A0027 B1421 S30E42 DSF
25/0140 0424 0526 LDE C1.4 226
25/0810 0824 N11W71 DSF
25/1133 1201 1243 LDE B8.1 70
INFERRED CORONAL HOLES: LOCATIONS VALID AT 25/2400Z
---------------------------------------------------
ISOLATED HOLES AND POLAR EXT
EAST SOUTH WEST NORTH CAR TYPE POL AREA OBSN
63 S26W56 S32W62 S08W76 S08W76 184 ISO POS 007 10830A
64 N60W22 N20W90 N24W90 N60W22 168 EXT
65 S34E16 S34E16 S08W12 S08W12 115 ISO POS 000 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 Feb: 0311 0315 0323 B4.6
0756 0836 0903 B2.9
1757 1833 1900 C2.9
2111 2117 2121 SF 7670 N12W66
REGION FLARE STATISTICS FOR THE PREVIOUS UTC DAY
------------------------------------------------
C M X S 1 2 3 4 Total (%)
-- -- -- -- -- -- -- -- --- ------
Region 7670: 0 0 0 1 0 0 0 0 001 (25.0)
Uncorrellated: 1 0 0 0 0 0 0 0 003 (75.0)
Total Events: 004 optical and x-ray.
EVENTS WIT
----------------------------------------------------------------
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.
SPECIAL INSERT: CURRENT X-RAY EMISSIONS FROM THE JAPANESE YOHKOH SPACECRAFT
===========================================================================
25 February 1994, 03:30 UTC
North
. . . .,,::::::,,,,,,...........
........,....,,,,,,,,... ... .,:;;;;;;;::::,,,,,,,,,...,.,
. ..,,,,::::::,,,,,,,,,,,,........... ...,,:;;;:::::::::,,,,,,,,,,
....,,,:::;::,,,,,,,,,,,:,,......,,........ ...,:;;:::;;;;:::::;;::
.....,,,::;;:,,,,,,,,,,,,,,,,,,.,..,...................,,:;;;;;----;;;;;;;
.....,,,,::;::::::::::::,,,,,,,,,,,,,,,,,,,....,...........,,;;--++-----;;;;
.....,,,::::::::;;;----;;::,,,,,,,,,,,,,,,.......,.,,,,,,....,,:;++|||||+++---
...,,,,::;::,,:;--++|||++;::,,:::,,,,,.....,........,.,,,,,,,,,,:;-|||||||||++
..,,,:::;;::::,,:-+||!!|||+;:::::::,,,,,,..,,.........,,,,,,,;:::::;+|!!!!!!!|+
.,,,::;;;;:::;;;;;;-+|!!!!!|-;;;;;;;::,,,,,.....,,,....,,,,::;;;;:;;+!23222221!
,,::;;--;;;;;;;;---;;--+!13332|++---;;::,,,,.,,,,,,.....,,,,::::;;;-+24#@@#**32
,::;;--+;:;;;;;--------|112221!!!!!|-;::,,,,,,,.,,,,.,.,,,,::::;;;--+2##@@@#432
,::;--+;::::;;;------;;-+|!||!!!123!-;;;:,,,,,,...,,,,,,,,:::;;;;;;-+!4*####331
::;--+|;;;;;;;;---;;;;---||+||+-!21+-;;:::,,,,..,,,,,,,,::::::;;;;---+134**4211
::;--++-;;;;;;----;---++++++;---|!+--;;:::-:,,:,,,,,,:,,::::::;;;;;;;;+133421!!
:;;-+++-;;;;------+-+++!!!|+-!13|--;;;;;;;:,,,,,:::::::,::;;;;;;;;;;;;;-|!!!!|+
:;;-+!1|+++--------+-+||!||+++21+:,.,,:::,,::;:;:;;:;;::;-++--;;;;;;;;;;-||+++-
,:--|14*2!!!--------+|||++-;::,:,....,,,::::;;;;;;;;;::;-++++--;-;;;;:::-+----;
,:;;+|133|++-;;----+++---;;:,.....,::::::::::::::;;::;;;-----;;;-;:,,,,:---;;;:
,:;;;+||!+------++++--;;;:,....,,:::;;;;::::;;::;::::;;;;;;;;;:;::,,,,,;---;;;;
.,,:::;;+--------+-;;;;::,..,,:::::::::::;;;;;:::::::::::::::::,,,,,,:;-;;;;;;:
.,,,,:::;;-----;;:;;;;;::,,.:::;;::::::::::::::::,,,,,:::::::::,,,:::;;;;;;;;::
..,,,:::;;----;;;;;;;;::,,::::;;::::::::,,,,,,,,::::,,,,,,,,,,,,,,:;;:::;:::::
....,::;;;----;;;;;;::::::::::::::::,:,,,,,,,,,,,,,,,,,,,,,,,:,::;;:::::::::::
...,,::::;;;;;;:;:;:::::::::::::::,,,,,,,,,,,,,,,..,,,,,,,,:::;;:::::::,,:,,,
...,,,,:::::::;;;;:::::::::::::::,,,:::::::::,,,,,:::::::::;;::::::::,,,,,,,
......,,,,,::;;;;;;;::::::,,,:::::,,,,::::::;;;;;;;;;;;+-;;;::::::,,,,,,,,,
....,,,::;;----;;;::,,,,,::,,,,,,,,,,,::::::::::::::::::,,,,,,,.......
...,,,::;;;;;;;::,,,..,,,,...............,,,,,,,,,,,,,,,,,,.........
....,,,,::::::,,..... ...... ....................
............. .
South
KEY: East and west limbs are to the left and right respectively. Emission
strength, from minimum to maximum are coded in the following way:
[space] . , : ; - + | ! 1 2 3 4 * # @
Units used are arbitrary, for illustrative purposes. Get "showasc.zip"
from "pub/solar/Software" at the anonymous FTP site: ftp.uleth.ca
(IP # 142.66.3.29) to view these images on VGA screens. Remove
all but the image data before typing "showasc filename".
** End of Daily Report **
------------------------------
Date: Fri, 25 Feb 1994 15:00:37 MST
From: ihnp4.ucsd.edu!swrinde!gatech!newsxfer.itd.umich.edu!nntp.cs.ubc.ca!alberta!ve6mgs!usenet@network.ucsd.edu
Subject: Weekly Solar Terrestrial Forecast & Review for 25 February
To: info-hams@ucsd.edu
--- SOLAR TERRESTRIAL FORECAST AND REVIEW ---
February 25 to March 06, 1994
Report Released by Solar Terrestrial Dispatch
P.O. Box 357, Stirling, Alberta, Canada
T0K 2E0
Accessible BBS System: (403) 756-3008
---------
ANNOUNCEMENT: The Solar Terrestrial Dispatch is pleased to announce the
release of a major HF and refractive-VHF propagation software package known
as SKYCOM. It is a MUST-HAVE for anyone involved in ionospheric radio
communications. This significant software package will analyze almost every
ionospheric parameter relavent to radio communications and will analyze the
behavior and characteristics of signals that pass between any two points on
the Earth and under almost any type of geophysical condition (geomagnetic
storming, solar flares, polar cap absorption, etc). Graphically ray trace
signals through a real model of the ionosphere, generate extensive global
ionospheric "weather" maps, produce broadcast coverage maps, and MUCH more.
The list of available functions is far too large to list here. For more
information, contact "Oler@Rho.Uleth.CA", or "COler@Solar.Stanford.Edu".
Pricing information can be obtained from the e-mail address above, by writing
to us through postal mail, or by calling the recorded message at:
403-756-2386 (approx. 3 min). A special offer applies until 31 March 1994.
---------
SOLAR AND GEOPHYSICAL ACT
----------------------------------------------------
|10.7 cm|HF Propagation +/- CON|SID AU.BKSR DX| Mag| Aurora |
|SolrFlx|LO MI HI PO SWF %MUF %|ENH LO MI HI LO MI HI %|K Ap|LO MI HI|
--|-------|-----------------------|-------------------------|----|--------|
25| 098 |VG G F F 15 -10 75| 15 NA NA NA 00 05 15 35|2 10|NV NV LO|
26| 093 |VG G F F 15 -10 75| 15 NA NA NA 00 05 15 35|2 08|NV NV LO|
27| 090 |VG G F F 15 -05 75| 15 NA NA NA 00 05 15 35|2 08|NV NV LO|
28| 090 |VG G F F 15 -05 75| 15 NA NA NA 00 05 15 35|2 08|NV NV LO|
01| 090 |VG G F F 15 00 70| 15 NA NA NA 01 10 15 35|3 12|NV NV LO|
02| 090 |VG G F F 15 00 70| 15 NA NA NA 01 10 15 35|2 10|NV NV LO|
03| 090 |VG G F F 15 00 70| 15 NA NA NA 01 10 20 35|3 12|NV NV LO|
04| 090 |VG F P P 15 -05 65| 15 NA NA NA 02 20 30 30|4 20|NV LO MO|
05| 090 | G P VP VP 15 -20 65| 15 NA NA NA 05 40 50 25|6 35|NV MO HI|
06| 090 | G P VP VP 15 -35 65| 15 NA NA NA 05 40 50 20|6 40|NV MO HI|
PEAK PLANETARY 10-DAY GEOMAGNETIC ACT
________________________________________________________________________
| EXT
| VERY SEVERE STORM | | | | | | | | | | | HIGH |
| SEVERE STORM | | | | | | | | | | | MODERATE |
| MAJOR STORM | | | | | | | | | * |** | LOW - MOD. |
| MINOR STORM | | | | | | | | |***|***| LOW |
| VERY ACT
| ACT
| UNSETTLED |** |** |** |** |***|***|***|***|***|***| NONE |
| QUIET |***|***|***|***|***|***|***|***|***|***| NONE |
| VERY QUIET |***|***|***|***|***|***|***|***|***|***| NONE |
|-------------------|---|---|---|---|---|---|---|---|---|---|------------|
| Geomagnetic Field |Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun| Anomaly |
| Conditions | Given in 8-hour UT intervals | Intensity |
|________________________________________________________________________|
CONFIDENCE LEVEL: 65%
NOTES:
Predicted geomagnetic activity is based heavily on recurrent
phenomena. Transient energetic solar events cannot be predicted reliably over
periods in excess of several days. Hence, there may be some deviations from
the predictions due to the unpredictable transient solar component.
60-DAY GRAPHICAL ANALYSIS OF GEOMAGNETIC ACT
____________________________________________________________
60 | J |
57 | J JJ |
54 | JJJ JJ |
51 | JJJ JJ |
48 | JJJ JJ |
45 | JJJ JJ |
42 | JJJ JJ |
39 | JJJ M JJ |
36 | JJJ MM JJ |
33 | JJJM MM JJ |
30 | JJJMMMM JJ |
27 | JJJMMMMAA JJ |
24 | AJJJMMMMAA JJ |
21 | A A AA AJJJMMMMAA JJ |
18 | AAA AAA AAA AA AJJJMMMMAAA JJ |
15 | AAAA AAAAA AAA AAA U AJJJMMMMAAAU A JJ |
12 | AAAA AAAAAUAAAU AAA U AJJJMMMMAAAU AUJJ |
9 | AAAAU U AAAAAUAAAU AAA U UU AJJJMMMMAAAU AUJJU |
6 | AAAAUQ UQU AAAAAUAAAUUU AAAUUUQUUUAJJJMMMMAAAUUUAUJJU |
3 |QQQAAAAUQQUQUQQAAAAAUAAAUUUQQQAAAUUUQUUUAJJJMMMMAAAUUUAUJJUQ|
0 |QQQAAAAUQQUQUQQAAAAAUAAAUUUQQQAAAUUUQUUUAJJJMMMMAAAUUUAUJJUQ|
------------------------------------------------------------
Chart Start Date: Day #362
NOTES:
This graph is determined by plotting the greater of either the planetary
A-index or the Boulder A-index. Graph lines are labelled according
to the severity of the activity which occurred on each day. The left-
hand column represents the associated A-Index for that day.
Q = Quiet, U = Unsettled, A = Active, M = Minor Storm,
J = Major Storm, and S = Severe Storm.
CUMULATIVE GRAPHICAL CHART OF THE 10.7 CM SOLAR RADIO FLUX
----------------------------------------------------------
____________________________________________________________
151 | |
148 | * |
145 | ** |
142 | * ** |
139 | ***** |
136 | ***** * |
133 |* ****** * |
130 |* ****** ** * |
127 |*********** *** |
124 |************ *** |
121 |************* *** |
118 |************* ****** |
115 |************** ****** |
112 |************** ******* |
109 |*************** ******** |
106 |*************** ******** **** ** |
103 |*************** * ********** **********|
100 |**************** ************** * ***********|
097 |***************** **************** * * *************|
094 |****************** ********************* ***** *************|
091 |****************** *****************************************|
088 |************************************************************|
------------------------------------------------------------
Chart Start: Day #362
GRAPHICAL ANALYSIS OF 90-DAY AVERAGE SOLAR FLUX
-----------------------------------------------
____________________________________________________________
108 | |
107 | **|
106 | **************************|
105 | ******************************|
104 | ********************************|
103 | ************************************|
102 | ***********************************************|
101 | *****************************************************|
100 | **********************************************************|
099 |************************************************************|
098 |************************************************************|
------------------------------------------------------------
Chart Start: Day #362
NOTES:
The 10.7 cm solar radio flux is plotted from data reported
by the Penticton Radio Observatory (formerly the ARO from
Ottawa). High solar flux levels denote higher levels of
activity and a greater number of sunspot groups on the Sun.
The 90-day mean solar flux graph is charted from the 90-day
mean of the 10.7 cm solar radio flux.
CUMULATIVE GRAPHICAL CHART OF SUNSPOT NUMBERS
---------------------------------------------
____________________________________________________________
161 | |
154 | * |
147 | * |
140 | ** |
133 | ** * *** |
126 | *** ***** |
119 | *** ****** |
112 | * *** ****** * |
105 |****** ****** *** |
098 |****** ******* **** |
091 |************** **** |
084 |************** ***** * * |
077 |************** ****** *** * * |
070 |*************** ****** *** ***** * * * |
063 |*************** * ******* *** ****** * *** * |
056 |****************** *********** ******* ****** * *|
049 |****************** * ******************************* * *|
042 |********************* * ******************************* ***|
035 |********************* ********************************* ***|
028 |******************************************************** ***|
021 |******************************************************** ***|
014 |************************************************************|
------------------------------------------------------------
Chart Start: Day #362
NOTES:
The graphical chart of sunspot numbers is created from the
daily sunspot number counts as reported by the SESC.
HF RADIO SIGNAL PROPAGATION PREDICTIONS (25 FEB - 06 MAR)
High Latitude Paths
________________________________________________________
| EXT
| VERY GOOD | | | | | | | | | | |
CONFIDENCE | GOOD | | | | | | | | | | |
LEVEL | FAIR |***|***|***|***|***|***| **| * | | |
------- | POOR | | | | | | |* |* *| * | |
65% | VERY POOR | | | | | | | | |* *| **|
| EXT
|----------------|---|---|---|---|---|---|---|---|---|---|
| PROPAGATION |Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun|
| QUALITY | Given in 8 Local-Hour Intervals |
--------------------------------------------------------
Middle Latitude Paths
________________________________________________________
| EXT
| VERY GOOD | | | | | | | | | | |
CONFIDENCE | GOOD |***|***|***|***|***|***|***|** | | |
LEVEL | FAIR | | | | | | | | *|** | * |
------- | POOR | | | | | | | | | *| *|
65% | VERY POOR | | | | | | | | | |* |
| EXT
|----------------|---|---|---|---|---|---|---|---|---|---|
| PROPAGATION |Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun|
| QUALITY | Given in 8 Local-Hour Intervals |
--------------------------------------------------------
Low Latitude Paths
________________________________________________________
| EXT
| VERY GOOD | | | | | | | | | | |
CONFIDENCE | GOOD |***|***|***|***|***|***|***|***| **| **|
LEVEL | FAIR | | | | | | | | |* |* |
------- | POOR | | | | | | | | | | |
70% | VERY POOR | | | | | | | | | | |
| EXT
|----------------|---|---|---|---|---|---|---|---|---|---|
| PROPAGATION |Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun|
| QUALITY | Given in 8 Local-Hour Intervals |
--------------------------------------------------------
NOTES:
NORTHERN HEMISPHERE SOUTHERN HEMISPHERE
High latitudes >= 55 deg. N. | High latitudes >= 55 deg. S.
Middle latitudes >= 40 < 55 deg. N. | Middle latitudes >= 30 < 55 deg. S.
Low latitudes < 40 deg. N. | Low latitudes < 30 deg. S.
POTENTIAL VHF DX PROPAGATION PREDICTIONS (25 FEB - 06 MAR)
INCLUDES SID AND AURORAL BACKSCATTER ENHANCEMENT PREDICTIONS
HIGH LAT
__________________________________________________ ___________________
| FORECAST | Given in 8 hour local time intervals | |SWF/SID ENHANCEMENT|
|CONFIDENCE|Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun| |F|S|S|M|T|W|T|F|S|S|
|__________|___|___|___|___|___|___|___|___|___|___| |-|-|-|-|-|-|-|-|-|-|
| 0% |***|***|***|***|***|***|***|***|***|***| 0%|*|*|*|*|*|*|*|*|*|*|
| 20% |***|***|***|***|***|***|***|***|***|***| 20%|*|*|*|*|*|*|*|*|*|*|
| 40% |***|***|***|***|***|***|***|***|***|***| 40%| | | | | | | | | | |
| 60% | * | * | * | * | * | * | * | | | | 60%| | | | | | | | | | |
| 80% | | | | | | | | | | | 80%| | | | | | | | | | |
| 100% | | | | | | | | | | |100%| | | | | | | | | | |
|==========|===|===|===|===|===|===|===|===|===|===| |-------------------|
| 100% | | | | | | | | | | |100%| | | | | | | | | | |
| 80% | | | | | | | | | | | 80%| | | | | | | | | | |
| 60% | | | | | | | | | | | 60%| | | | | | | | |*|*|
| 40% | | * | * | * | * | * | * | *|* *|* *| 40%| | | | | | | | |*|*|
| 20% |***|***|***|***|***|***|***|***|***|***| 20%| | | | | | | |*|*|*|
| 0% |***|***|***|***|***|***|***|***|***|***| 0%|*|*|*|*|*|*|*|*|*|*|
|----------|---|---|---|---|---|---|---|---|---|---| |-|-|-|-|-|-|-|-|-|-|
|CHANCE OF |Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun| |F|S|S|M|T|W|T|F|S|S|
| VHF DX | Given in 8 hour local time intervals | |AURORAL BACKSCATTER|
|__________|_______________________________________| |___________________|
MIDDLE LAT
__________________________________________________ ___________________
| FORECAST | Given in 8 hour local time intervals | |SWF/SID ENHANCEMENT|
|CONFIDENCE|Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun| |F|S|S|M|T|W|T|F|S|S|
|__________|___|___|___|___|___|___|___|___|___|___| |-|-|-|-|-|-|-|-|-|-|
| 0% |***|***|***|***|***|***|***|***|***|***| 0%|*|*|*|*|*|*|*|*|*|*|
| 20% |***|***|***|***|***|***|***|***|***|***| 20%|*|*|*|*|*|*|*|*|*|*|
| 40% |***|***|***|***|***|***|***|***|***|***| 40%|*|*|*|*|*|*|*|*|*|*|
| 60% |***|***|***|***|***|***|***|***| | | 60%| | | | | | | | | | |
| 80% | | | | | | | | | | | 80%| | | | | | | | | | |
| 100% | | | | | | | | | | |100%| | | | | | | | | | |
|==========|===|===|===|===|===|===|===|===|===|===| |-------------------|
| 100% | | | | | | | | | | |100%| | | | | | | | | | |
| 80% | | | | | | | | | | | 80%| | | | | | | | | | |
| 60% | | | | | | | | | | | 60%| | | | | | | | | | |
| 40% |***|***|***|***|***|***|***|***|* *|* *| 40%| | | | | | | | |*|*|
| 20% |***|***|***|***|***|***|***|***|***|***| 20%| | | | | | | |*|*|*|
| 0% |***|***|***|***|***|***|***|***|***|***| 0%|*|*|*|*|*|*|*|*|*|*|
|----------|---|---|---|---|---|---|---|---|---|---| |-|-|-|-|-|-|-|-|-|-|
|CHANCE OF |Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun| |F|S|S|M|T|W|T|F|S|S|
| VHF DX | Given in 8 hour local time intervals | |AURORAL BACKSCATTER|
|__________|_______________________________________| |___________________|
LOW LAT
__________________________________________________ ___________________
| FORECAST | Given in 8 hour local time intervals | |SWF/SID ENHANCEMENT|
|CONFIDENCE|Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun| |F|S|S|M|T|W|T|F|S|S|
|__________|___|___|___|___|___|___|___|___|___|___| |-|-|-|-|-|-|-|-|-|-|
| 0% |***|***|***|***|***|***|***|***|***|***| 0%|*|*|*|*|*|*|*|*|*|*|
| 20% |***|***|***|***|***|***|***|***|***|***| 20%|*|*|*|*|*|*|*|*|*|*|
| 40% |***|***|***|***|***|***|***|***|***|***| 40%|*|*|*|*|*|*|*|*|*|*|
| 60% |***|***|***|***|***|***|***|***|***|***| 60%| | | | | | | | | | |
| 80% | | | | | | | | | | | 80%| | | | | | | | | | |
| 100% | | | | | | | | | | |100%| | | | | | | | | | |
|==========|===|===|===|===|===|===|===|===|===|===| |-------------------|
| 100% | | | | | | | | | | |100%| | | | | | | | | | |
| 80% | | | | | | | | | | | 80%| | | | | | | | | | |
| 60% | * | * | * | * | * | * | * | * | | | 60%| | | | | | | | | | |
| 40% |***|***|***|***|***|***|***|***|***|***| 40%| | | | | | | | | | |
| 20% |***|***|***|***|***|***|***|***|***|***| 20%| | | | | | | | |*|*|
| 0% |***|***|***|***|***|***|***|***|***|***| 0%|*|*|*|*|*|*|*|*|*|*|
|----------|---|---|---|---|---|---|---|---|---|---| |-|-|-|-|-|-|-|-|-|-|
|CHANCE OF |Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun| |F|S|S|M|T|W|T|F|S|S|
| VHF DX | Given in 8 hour local time intervals | |AURORAL BACKSCATTER|
|__________|_______________________________________| |___________________|
NOTES:
These VHF DX prediction charts are defined for the 30 MHz to 220 MHz
bands. They are based primarily on phenomena which can affect VHF DX
propagation globally. They should be used only as a guide to potential
DX conditions on VHF bands. Latitudinal boundaries are the same as those for
the HF predictions charts.
AURORAL ACT
High Latitude Locations
________________________________________________________
| EXT
CONFIDENCE | VERY HIGH | | | | | | | | | | |
LEVEL | HIGH | | | | | | | | * | * |** |
------- | MODERATE | | | | | | | * |***|***|***|
65% | LOW | * | * | * | * | * |** |***|***|***|***|
| NOT
|----------------|---|---|---|---|---|---|---|---|---|---|
| AURORAL |Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun|
| INT
--------------------------------------------------------
Middle Latitude Locations
________________________________________________________
| EXT
CONFIDENCE | VERY HIGH | | | | | | | | | | |
LEVEL | HIGH | | | | | | | | | | |
------- | MODERATE | | | | | | | | * |***|***|
65% | LOW | | | | | | | * |***|***|***|
| NOT
|----------------|---|---|---|---|---|---|---|---|---|---|
| AURORAL |Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun|
| INT
--------------------------------------------------------
Low Latitude Locations
________________________________________________________
| EXT
CONFIDENCE | VERY HIGH | | | | | | | | | | |
LEVEL | HIGH | | | | | | | | | | |
------- | MODERATE | | | | | | | | | | |
70% | LOW | | | | | | | | * | * | * |
| NOT
|----------------|---|---|---|---|---|---|---|---|---|---|
| AURORAL |Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun|
| INT
--------------------------------------------------------
NOTE:
Version 2.00b of our Professional Dynamic Auroral Oval Simulation
Software Package is now available. This professional software is
particularly valuable to radio communicators, aurora photographers,
educators, and astronomers. For more information regarding this software,
contact: "Oler@Rho.Uleth.CA", or "COler@Solar.Stanford.Edu".
For more information regarding these charts, send a request for the
document, "Understanding Solar Terrestrial Reports" to: "Oler@Rho.Uleth.Ca"
or to: "COler@Solar.Stanford.Edu". This document, as well as others and
related data/forecasts exist on the STD BBS at: (403) 756-3008.
** End of Report **
------------------------------
End of Info-Hams Digest V94 #219
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