Return-path: X-Andrew-Authenticated-as: 7997;andrew.cmu.edu;Ted Anderson Received: from hogtown.andrew.cmu.edu via trymail for +dist+/afs/andrew.cmu.edu/usr11/tm2b/space/space.dl@andrew.cmu.edu (->+dist+/afs/andrew.cmu.edu/usr11/tm2b/space/space.dl) (->ota+space.digests) ID ; Wed, 6 Mar 91 01:39:34 -0500 (EST) Message-ID: Precedence: junk Reply-To: space+@Andrew.CMU.EDU From: space-request+@Andrew.CMU.EDU To: space+@Andrew.CMU.EDU Date: Wed, 6 Mar 91 01:39:28 -0500 (EST) Subject: SPACE Digest V13 #233 SPACE Digest Volume 13 : Issue 233 Today's Topics: SOLAR TERRESTRIAL FORECAST AND REVIEW Administrivia: Submissions to the SPACE Digest/sci.space should be mailed to space+@andrew.cmu.edu. Other mail, esp. [un]subscription requests, should be sent to space-request+@andrew.cmu.edu, or, if urgent, to tm2b+@andrew.cmu.edu ---------------------------------------------------------------------- X-Delivery-Notice: SMTP MAIL FROM does not correspond to sender. Date: Mon, 4 Mar 91 00:32:01 MST From: oler%HG.ULeth.CA@vma.cc.cmu.edu (CARY OLER) Subject: SOLAR TERRESTRIAL FORECAST AND REVIEW X-St-Vmsmail-To: st%"space+@andrew.cmu.edu" /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ Please note that the address for the Solar Terrestrial Dispatch has changed slightly. It used to be "std_oler@hg.uleth.ca". It is now "oler@hg.uleth.ca". Please note this change and send any future comments or questions to "oler@hg.uleth.ca". We will soon have a direct line into UseNet. When this becomes operational, reports will be relayed directly to the newsgroup "sci.astro" (as so many of you have requested), in addition to the numerous other groups and lists currently being serviced. /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ --- SOLAR TERRESTRIAL FORECAST AND REVIEW --- March 02 to March 05, 1991 Report Based In-Part from Data Obtained from the Space Environment Services Center Boulder Colorado -------- SOLAR TERRESTRIAL REVIEW FOR 24 FEBRUARY TO 02 MARCH Solar activity ranged from low to high. Generally, activity has remained confined to low levels. The only major exception was 25 February when a major class X1.2/2N Tenflare erupted from Region 6497. This flare was associated with strong Type II, III and IV bursts and produced a small satellite-level proton event at 12:10 UT on 25 February. Protons peaked at 13 p.f.u. at greater than 10 MeV on 25 February at 13:05 UT. The event then ended shortly thereafter at 13:35 UT. The location of this flare was near the western limb, at S16W80. The event was an impulsive long-duration type. The event began at 08:06 UT, peaked at 08:19 UT and ended at 09:51 UT on 25 February. The flare produced an interplanetary shockwave that reached the Earth on 28 February. Sudden magnetic impulses were observed early on 28 February which were followed by increased geomagnetic activity. Activity remained generally unsettled, with periods of minor storming being observed over many high latitude locations. Some brief periods of high latitude major storming were also observed. Middle latitudes remained generally unsettled with a few periods of active conditions. Activity since then has remained generally low with a few low level M-class flares observed. A class M2.0/2B flare occurred from Region 6514 at 04:56 UT on 01 March. This flare was accompanied by a weak Type II sweep and minor radio emissions. It was, however, a long-duration event, lasting 62 minutes. This event was associated with a weak SWF. The most recent M-class flares occurred on 02 March. The first event occurred at 13:49 UT and attained a class M1.1 x-ray rating. The most recent flare was rated a class M1.8 x-ray event and was of very long duration (162 minutes). Both of these events were optically uncorrelated, but their signatures indicate that they probably did originate beyond either the east or west limb. Neither of the limbs exhibited any activity at the time of these flares, so it is uncertain which limb produced the events. Several regions are due to return around the east limb over the next 48 hours which could be responsible. Likewise, there are several regions beyond the west limb which could have been responsible for these events. At any rate, the latter long-duration flare produced a Type II sweep and was associated with an 850 s.f.u. Tenflare which began at 13:46 UT and lasted 10 minutes. The most active geomagnetic day of the period occurred on 28 February. Activity remained mostly unsettled to active. The cause of the activity was the X-class flare of 25 February. Since then, activity has remained generally unsettled. Auroral activity became moderate to high over many high latitude regions on 28 February. Some periods of moderate activity were observed over some middle latitude areas, but overall, activity remained generally low to moderate. The most intense activity remained confined to the auroral zone over the high latitude regions. HF propagation conditions ranged from above normal near the beginning of the week, to normal. Below normal conditions existed over the middle and high latitudes on 28 February. Activity has since returned to normal over all latitudes and regions. MUF's have begun declining with the recent decrease in the solar indices. VHF propagation remained normal throughout the period. Some isolated auroral backscatter communications may have been possible over the northerly middle and high latitudes on 28 February. Openings on 6 meters were possible (and reported) over many areas over the past two weeks, due to the high levels of the solar indices. Overall, MUF's for stable DX ranged from near 30 MHz to over 50 MHz. SHORT TERM SOLAR TERRESTRIAL FORECAST Solar activity is on the decline again. Solar indices have dropped over the past week. Further drops in the indices are expected over the next week (barring the return of any unusually active regions). No major flaring is anticipated over the next week. M-class flaring is also expected to remain fairly dormant over the coming week. The background x-ray flux should drop to near the C1.0 level or the high B-class levels. Sunspot numbers are currently hovering near 210. They will drop over the next 72 hours to the range near the 150-175. Geomagnetic activity will remain mostly unsettled to quiet over the next week. As we near the vernal equinox, a slight increase in the background magnetic activity will likely occur. An increase to generally unsettled to active levels is possible between 07 and 09 March, in response to possible recurrent coronal activity. Auroral activity should remain dormant over the middle and low latitudes. High latitudes could experience occasionally frequent periods of low auroral activity as we near the vernal equinox. Activity should become generally low to moderate over the higher latitudes between 07 and 09 March, again in response to recurrent solar coronal activity. HF propagation conditions will remain normal thorughout the week. DX will remain possible over the high HF frequencies. MUF's should drop to values between 34 MHz and 42 MHz by the end of the week (barring the return of any abnormally active solar regions). No significant SID's or SWF's are anticipated. High latitude noise levels could be higher than normal over the coming weeks due to possible increases in the background magnetic activity. VHF conditions will remain normal. No significant opportunities for DX are expected, although the lower frequencies near 6 meters remain the best choices for experiencing potential DX during the sunlit periods. DX on 6 meters should become very isolated and infrequent as the week progresses. However, occasional isolated sporadic E could provide brief conditions suitable for DX on 6 meters. SUMMARY OF ALL ACTIVE REGIONS VISIBLE ON THE SOLAR DISK AS OF 03 MARCH Region # Location LO Area Class LL Spots Magnetic Type -------- -------- --- ---- ----- -- ----- ------------- 6508 S14W78 187 1200 DAO 08 018 BETA 6509 S22W82 191 3120 EKO 11 011 BETA 6514 N21W67 176 0000 AXX 02 002 ALPHA 6516 S06W48 157 0360 CAO 08 007 BETA 6518 S15W27 136 0000 AXX 00 001 ALPHA 6521 S11W75 184 0060 CRO 03 004 BETA 6522 N28W64 173 0030 BXO 04 004 BETA 6523 N04W15 124 0750 DAO 08 020 BETA 6524 S11W39 148 0030 BXO 04 002 BETA 6525 S17W28 137 0030 BXO 04 003 BETA 6528 S11W59 168 0000 AXX 01 002 ALPHA 6529 N10W14 123 0030 BXO 03 003 BETA 6530 N11E73 036 0150 DAO 06 003 BETA NOTES: Area is in million square kilometers. Angular extent (LL) and solar longitude (LO) are in degree's. For more information regarding the terminology used above, request the Glossary of Solar Terrestrial Terms from: "oler@hg.uleth.ca". H-ALPHA PLAGES WITHOUT SPOTS. LOCATIONS VALID AS OF 00:00 UT ON 03 MARCH REGION LOCATION LO COMMENTS (IF ANY) ------ -------- --- ------------------------------- 6513 N17W83 192 NONE 6520 N18W18 127 6526 S16W44 153 6527 S17W06 115 ACTIVE REGIONS DUE TO RETURN BETWEEN 03 MARCH AND 05 MARCH Region Latitude Longitude (Helio.) ------ -------- --------- 6487 N14 011 6492 S12 013 6488 S14 341 6501 S10 349 6502 S13 352 6511 S23 346 NOTES: For definitions regarding the above, request the "Glossary of Solar Terrestrial Terms" from "oler@hg.uleth.ca". GRAPHICAL ANALYSIS OF RECENT PLANETARY (GLOBAL) GEOMAGNETIC ACTIVITY Cumulative Geomagnetic Activity History Peak Planetary Geomagnetic Activity during the past 96 hours ____________________________________________________________________ | EXTREMELY SEVERE | | | | | VERY HIGH! | | VERY SEVERE STORM | | | | | HIGH | | SEVERE STORM | | | | | MODERATE | | MAJOR STORM | | | | | LOW - MOD. | | MINOR STORM | | | | | LOW | | VERY ACTIVE | | | * | | NONE | | ACTIVE | * | * * |******* |* ** | NONE | | UNSETTLED |******* | *****|********|** *****| NONE | | QUIET |********|********|********|********| NONE | | VERY QUIET |********|********|********|********| NONE | |-------------------|--------|--------|--------|--------|------------| | Geomagnetic Field | Wed. | Thu. | Fri. | Sat. | Anomaly | | Conditions | Given in 3-hour intervals | Intensity | |____________________________________________________________________| NOTES: The data above represents planetary geomagnetic activity. Data from many magnetic observatories around the world are used in constructing the above chart. The first graph line for each day represents geomagnetic activity which occurred between 00 UT and 03 UT. The second graph line represents activity which occurred between 03 UT and 06 UT, etc. For information regarding the interpretation and/or use of these charts, send a request for the document "Understanding Solar Terrestrial Reports" to: oler@hg.uleth.ca. PLANETARY 10-DAY GEOMAGNETIC ACTIVITY OUTLOOK (03 MARCH - 12 MARCH) ________________________________________________________________________ | EXTREMELY SEVERE | | | | | | | | | | | VERY HIGH! | | VERY SEVERE STORM | | | | | | | | | | | HIGH | | SEVERE STORM | | | | | | | | | | | MODERATE | | MAJOR STORM | | | | | | | | | | | LOW - MOD. | | MINOR STORM | | | | | | | | | | | LOW | | VERY ACTIVE | | | | | | | | | | | NONE | | ACTIVE | | | | | * | | | | | | NONE | | UNSETTLED |** |** |** |***|***|***|** | * | * |***| NONE | | QUIET |***|***|***|***|***|***|***|***|***|***| NONE | | VERY QUIET |***|***|***|***|***|***|***|***|***|***| NONE | |-------------------|---|---|---|---|---|---|---|---|---|---|------------| | Geomagnetic Field |Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun|Mon|Tue| Anomaly | | Conditions | Given in 8-hour intervals | Intensity | |________________________________________________________________________| CONFIDENCE LEVEL: 75% 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. GRAPHICAL ANALYSIS OF SOLAR ACTIVITY OVER THE PAST 60 DAYS Cumulative Graphical Analysis of Solar Activity ____________________________________________________________ 377| | V.HIGH 363| F | V.HIGH 348| *FF | V.HIGH 334| *FF | V.HIGH 320| **FF | V.HIGH 306| **FF* **F | V.HIGH 291| F**FF** ****F | HIGH 277| *F**FF** *****F | HIGH 263| F*F**FF*** *******F* | HIGH 249| F*F**FF*** *******F** | MOD. 234| *F*F**FF***F *******F** | MOD. 220| * ***F*F**FF***F* *******F*** | MOD. 206| ***** F ***F*F**FF***F* F *********F*****| MOD. 192| ******* *F*******F*F**FF***F**FF **********F*****| MOD. 177|** ***********F*******F*F**FF***F**FF* **************F*****| LOW 163|***************F*******F*F**FF***F**FF****************F*****| LOW ------------------------------------------------------------ Cumulative 60 day Solar Activity Record Start Date: January 1, 1991 NOTES: Left-hand column digits represent the 10.7 cm solar radio flux obtained from Ottawa. The right-hand column describes the relative solar activity for that period based on the average number of major and minor flares that can be expected for related solar flux values. Plot lines labeled with the letter "F" represent days where at least one major flare occurred (ie. class M5 or greater flare). GRAPHICAL 20-DAY SOLAR ACTIVITY PREDICTION Solar Activity _________________________________________________________________ | 284 | | | | | | | | | | | | | | | | | | | | | | 275 | | | | | | | | | | | | | | | | |**|**|**| | | 266 | | | | | | | | | | | | | | | |**| | | |**| | 257 | | | | | | | | | | | | | | | | | | | | | | 248 | | | | | | | | | | | | | | |**| | | | | | | 240 | | | | | | | | | | | | | |**| | | | | | | | 231 | | | | | | | | | | | | | | | | | | | | | | 222 | | | | | | | | | | | | |**| | | | | | | | | 213 | | | | | | | | | | | | | | | | | | | | | | 204 |**| | | | | | | | | | |**| | | | | | | | | | 195 | |**| | | | | | | | | | | | | | | | | | | | 187 | | |**|**| | | | | | |**| | | | | | | | | | | 178 | | | | |**|**| | |**|**| | | | | | | | | | | | 169 | | | | | | |**|**| | | | | | | | | | | | | |-----|--|--|--|--|--|--|--|--|--|--|--|--|--|--|--|--|--|--|--|--| |Solar|03|04|05|06|07|08|09|10|11|12|13|14|15|16|17|18|19|20|21|22| |Flux | March | ----------------------------------------------------------------- CONFIDENCE LEVEL: 60% HF RADIO SIGNAL PROPAGATION PREDICTIONS (03 MARCH - 12 MARCH) High Latitude Paths ________________________________________________________ | EXTREMELY GOOD | | | | | | | | | | | | VERY GOOD | | | | | | | | | | | CONFIDENCE | GOOD | | | | | | | | | | | LEVEL | FAIR |***|***|***|* *| | | *|* *|***|***| ------- | POOR | | | | * |***|***|** | * | | | 75% | VERY POOR | | | | | | | | | | | | EXTREMELY POOR | | | | | | | | | | | |----------------|---|---|---|---|---|---|---|---|---|---| | PROPAGATION |Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun|Mon|Tue| | QUALITY | Given in 8-Hour UT Intervals | -------------------------------------------------------- Middle Latitude Paths ________________________________________________________ | EXTREMELY GOOD | | | | | | | | | | | | VERY GOOD |***|***|***|* *| *| | *|* *|***|* *| CONFIDENCE | GOOD | | | | * |** |***|** | * | | * | LEVEL | FAIR | | | | | | | | | | | ------- | POOR | | | | | | | | | | | 75% | VERY POOR | | | | | | | | | | | | EXTREMELY POOR | | | | | | | | | | | |----------------|---|---|---|---|---|---|---|---|---|---| | PROPAGATION |Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun|Mon|Tue| | QUALITY | Given in 8-Hour UT Intervals | -------------------------------------------------------- Low Latitude Paths ________________________________________________________ | EXTREMELY GOOD | | | | | | | | | | | | VERY GOOD |***|***|***|* *| *| *|* *|***|***|* *| CONFIDENCE | GOOD | | | | * |** |** | * | | | * | LEVEL | FAIR | | | | | | | | | | | ------- | POOR | | | | | | | | | | | 80% | VERY POOR | | | | | | | | | | | | EXTREMELY POOR | | | | | | | | | | | |----------------|---|---|---|---|---|---|---|---|---|---| | PROPAGATION |Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun|Mon|Tue| | QUALITY | Given in 8-Hour UT Intervals | -------------------------------------------------------- NOTES: High latitudes >= 55 degree's north latitude Middle latitudes >= 40 < 55 degree's north latitude Low latitudes < 40 degree's north latitude POTENTIAL VHF DX PROPAGATION PREDICTIONS (03 MARCH - 12 MARCH) INCLUDES SID AND AURORAL BACKSCATTER ENHANCEMENT PREDICTIONS HIGH LATITUDES __________________________________________________ ___________________ | SIGNAL | Given in 8 hour local time intervals | | SID ENHANCEMENT | | QUALITY |Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun|Mon|Tue| |S|M|T|W|T|F|S|S|M|T| |__________|___|___|___|___|___|___|___|___|___|___| |-|-|-|-|-|-|-|-|-|-| | VERY GOOD| | | | | | | | | | | 0%|*|*|*|*|*|*|*|*|*|*| |ABOVE NORM| | | | | | | | | | | 20%| | | | | | | | |*|*| | NORMAL|***|***|***|***|***|***|***|***|***|***| 40%| | | | | | | | | | | |BELOW NORM| | | | | | | | | | | 60%| | | | | | | | | | | | VERY POOR| | | | | | | | | | | 80%| | | | | | | | | | | | BLACKOUT| | | | | | | | | | |100%| | | | | | | | | | | |==========|===|===|===|===|===|===|===|===|===|===| |-------------------| | 100% | | | | | | | | | | |100%| | | | | | | | | | | | 80% | | | | | | | | | | | 80%| | | | | | | | | | | | 60% | | | | | | | | | | | 60%| | | | | | | | | | | | 40% | | | | | | | | | | | 40%| | | | | | | | | | | | 20% | | | | |* *|* *| | | * | * | 20%| | | | |*|*|*| | | | | 0% |***|***|***|***|***|***|***|***|***|***| 0%|*|*|*|*|*|*|*|*|*|*| |----------+---|---|---|---|---|---|---|---|---|---| |-|-|-|-|-|-|-|-|-|-| |CHANCE OF |Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun|Mon|Tue| |S|M|T|W|T|F|S|S|M|T| | VHF DX | Given in 8 hour local time intervals | |AURORAL BACKSCATTER| |__________|_______________________________________| |___________________| MIDDLE LATITUDES __________________________________________________ ___________________ | SIGNAL | Given in 8 hour local time intervals | | SID ENHANCEMENT | | QUALITY |Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun|Mon|Tue| |S|M|T|W|T|F|S|S|M|T| |__________|___|___|___|___|___|___|___|___|___|___| |-|-|-|-|-|-|-|-|-|-| | VERY GOOD| | | | | | | | | | | 0%|*|*|*|*|*|*|*|*|*|*| |ABOVE NORM| | | | | | | | | | | 20%|*|*| | | | | | |*|*| | NORMAL|***|***|***|***|***|***|***|***|***|***| 40%| | | | | | | | | | | |BELOW NORM| | | | | | | | | | | 60%| | | | | | | | | | | | VERY POOR| | | | | | | | | | | 80%| | | | | | | | | | | | BLACKOUT| | | | | | | | | | |100%| | | | | | | | | | | |==========|===|===|===|===|===|===|===|===|===|===| |-------------------| | 100% | | | | | | | | | | |100%| | | | | | | | | | | | 80% | | | | | | | | | | | 80%| | | | | | | | | | | | 60% | | | | | | | | | | | 60%| | | | | | | | | | | | 40% | * | * | * | | | | | | | * | 40%| | | | | | | | | | | | 20% | * | * | * | * | * | * | * | * | * | * | 20%| | | | | | | | | | | | 0% |***|***|***|***|***|***|***|***|***|***| 0%|*|*|*|*|*|*|*|*|*|*| |----------+---|---|---|---|---|---|---|---|---|---| |-|-|-|-|-|-|-|-|-|-| |CHANCE OF |Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun|Mon|Tue| |S|M|T|W|T|F|S|S|M|T| | VHF DX | Given in 8 hour local time intervals | |AURORAL BACKSCATTER| |__________|_______________________________________| |___________________| LOW LATITUDES __________________________________________________ ___________________ | SIGNAL | Given in 8 hour local time intervals | | SID ENHANCEMENT | | QUALITY |Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun|Mon|Tue| |S|M|T|W|T|F|S|S|M|T| |__________|___|___|___|___|___|___|___|___|___|___| |-|-|-|-|-|-|-|-|-|-| | VERY GOOD| | | | | | | | | | | 0%|*|*|*|*|*|*|*|*|*|*| |ABOVE NORM| | | | | | | | | | | 20%|*|*| | | | | | |*|*| | NORMAL|***|***|***|***|***|***|***|***|***|***| 40%| | | | | | | | | | | |BELOW NORM| | | | | | | | | | | 60%| | | | | | | | | | | | VERY POOR| | | | | | | | | | | 80%| | | | | | | | | | | | BLACKOUT| | | | | | | | | | |100%| | | | | | | | | | | |==========|===|===|===|===|===|===|===|===|===|===| |-------------------| | 100% | | | | | | | | | | |100%| | | | | | | | | | | | 80% | | | | | | | | | | | 80%| | | | | | | | | | | | 60% | | | | | | | | | | | 60%| | | | | | | | | | | | 40% | * | * | * | | | | | | | * | 40%| | | | | | | | | | | | 20% | * | * | * | * | * | * | * | * | * | * | 20%| | | | | | | | | | | | 0% |***|***|***|***|***|***|***|***|***|***| 0%|*|*|*|*|*|*|*|*|*|*| |----------+---|---|---|---|---|---|---|---|---|---| |-|-|-|-|-|-|-|-|-|-| |CHANCE OF |Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun|Mon|Tue| |S|M|T|W|T|F|S|S|M|T| | VHF DX | Given in 8 hour local time intervals | |AURORAL BACKSCATTER| |__________|_______________________________________| |___________________| NOTES: These VHF DX prediction charts are defined for the 50 MHz to 150 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. For more information, request the document "Understanding Solar Terrestrial Reports" from: "oler@hg.uleth.ca". AURORAL ACTIVITY PREDICTIONS (03 MARCH - 12 MARCH) High Latitude Locations ________________________________________________________ | EXTREMELY HIGH | | | | | | | | | | | CONFIDENCE | VERY HIGH | | | | | | | | | | | LEVEL | HIGH | | | | | | | | | | | ------- | MODERATE | | | | | * | * | | | | | 70% | LOW | | | * |***|***|***|***| * | * | * | | NOT VISIBLE |***|***|***|***|***|***|***|***|***|***| |----------------|---|---|---|---|---|---|---|---|---|---| | AURORAL |Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun|Mon|Tue| | INTENSITY | Eve.Twilight/Midnight/Morn.Twilight | -------------------------------------------------------- Middle Latitude Locations ________________________________________________________ | EXTREMELY HIGH | | | | | | | | | | | CONFIDENCE | VERY HIGH | | | | | | | | | | | LEVEL | HIGH | | | | | | | | | | | ------- | MODERATE | | | | | | | | | | | 80% | LOW | | | | | * | * | | | | | | NOT VISIBLE |***|***|***|***|***|***|***|***|***|***| |----------------|---|---|---|---|---|---|---|---|---|---| | AURORAL |Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun|Mon|Tue| | INTENSITY | Eve.Twilight/Midnight/Morn.Twilight | -------------------------------------------------------- Low Latitude Locations ________________________________________________________ | EXTREMELY HIGH | | | | | | | | | | | CONFIDENCE | VERY HIGH | | | | | | | | | | | LEVEL | HIGH | | | | | | | | | | | ------- | MODERATE | | | | | | | | | | | 95% | LOW | | | | | | | | | | | | NOT VISIBLE |***|***|***|***|***|***|***|***|***|***| |----------------|---|---|---|---|---|---|---|---|---|---| | AURORAL |Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun|Mon|Tue| | INTENSITY | Eve.Twilight/Midnight/Morn.Twilight | -------------------------------------------------------- NOTE: For more information regarding these charts, send a request for the document, "Understanding Solar Terrestrial Reports" to: oler@hg.uleth.ca. ** End of Report ** ------------------------------ End of SPACE Digest V13 #233 *******************