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Internet Message Format | 1991-06-15 | 29KB

Return-path: <ota+space.mail-errors@andrew.cmu.edu> 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 </afs/andrew.cmu.edu/usr1/ota/Mailbox/ocKOq=i00WBwQM6U4u>; Sat, 15 Jun 91 02:02:51 -0400 (EDT) Message-ID: <8cKOq6-00WBwEM4k5A@andrew.cmu.edu> Precedence: junk Reply-To: space+@Andrew.CMU.EDU From: space-request+@Andrew.CMU.EDU To: space+@Andrew.CMU.EDU Date: Sat, 15 Jun 91 02:02:46 -0400 (EDT) Subject: SPACE Digest V13 #647 SPACE Digest Volume 13 : Issue 647 Today's Topics: Re: Good for the Japanese Do shuttle boosters damage ozone layer? 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 ---------------------------------------------------------------------- Date: 30 May 91 16:40:48 GMT From: cis.ohio-state.edu!zaphod.mps.ohio-state.edu!swrinde!cs.utexas.edu!news-server.csri.toronto.edu!utgpu!utzoo!henry@ucbvax.Berkeley.EDU (Henry Spencer) Subject: Re: Good for the Japanese In article <1991May30.120254.300@eagle.lerc.nasa.gov> ecaxron@venus.lerc.nasa.gov writes: >>BTW, where were all the astronaut supporters screaming about >>"international agreements" when Solar-Polar got cut to feed the overgrown >>Shuttle budget? What a bunch of hypocrites. > >Solar-Polar. What was once known as the International Solar-Polar Mission >(ISPM), and is now known as Ulysses, was not cut... Oh yes it was; back in the days when it was ISPM, it was to consist of *two* spacecraft, one built by the US. The US reneged on (most of) its half of the deal without warning or negotiation. However, as various people have pointed out, Nick is letting his prejudices blind him. Many of us "astronaut supporters" were thoroughly pissed off about the ISPM cut. -- "We're thinking about upgrading from | Henry Spencer @ U of Toronto Zoology SunOS 4.1.1 to SunOS 3.5." | henry@zoo.toronto.edu utzoo!henry ------------------------------ Date: 31 May 91 22:37:18 GMT From: stanford.edu!leland.Stanford.EDU!etoyoc@uunet.uu.net (aaron thode) Subject: Do shuttle boosters damage ozone layer? I recall a few months ago that there was a fierce argument about whether the 500 tons of toxic exhaust released by the shuttle SRBs harmed the ozone layer. Has any actual hard data been obtained for this claim, or is it another "environmental panic?" Thanks in advance, Aaron Thode ------------------------------ Date: 31 May 91 19:27:32 GMT From: aunro!alberta!cpsc.ucalgary.ca!yogi.hsc.ucalgary.ca!honte.uleth.ca!oler@lll-winken.llnl.gov (Cary Oler) Subject: SOLAR TERRESTRIAL FORECAST AND REVIEW --- SOLAR TERRESTRIAL FORECAST AND REVIEW --- May 31 to June 09, 1991 Report Released by Solar Terrestrial Dispatch P.O. Box 357, Stirling, Alberta, Canada T0K 2E0 --------- SOLAR TERRESTRIAL REVIEW FOR 24 MAY TO 30 MAY The beginning of the week was associated with low levels of solar activity. The rotational minimum occurred on 22 May when the 10.7 cm solar flux dipped to 147. This minimum was higher than the previous rotational minimum of 135 on 24 April. Flare activity remained within C-class levels until 27 May, when Region 6654 began to rotate into view. It emerged around the eastern limb and promptly began producing a tremendous flury of M-class flare activity. Among the flares it has spawned so far is a class M5.3/1B at 10:22 UT on 28 May, an impulsive class X1.0/2B tenflare at 23:45 UT on 29 May. This region topped off the activity with a recent class M8.2/1F flare at 09:41 UT on 30 May. Most of the flare activity has been confined to the lower M-class levels. However, the X-class flare and high-level M-class event attests to the potency and instability which exists in this region. Region 6654 is small compared to Region 6644, which is a large EKI beta-type spot group and is about three times larger than Region 6654. Region 6644 has remained dormant and has begun to show signs of fragmentation and reorientation. On the other hand, Region 6654 has maintained its flare potential and structure and should continue to be an active flare producing region. Geomagnetic activity this week was plagued with storm periods. The activity appeared to peak on 25 May when widespread periods of geomagnetic storming was observed over most latitudes. Minor to major geomagnetic storming was observed over the high latitude regions while the middle latitudes expierienced periods of minor storming. The cause of this activity was a well placed coronal hole. Conditions have begun to improve as of late. A full recovery should be observed by 02 or 03 June, barring any future significant major flaring. Auroral activity was highest on 25 May. High latitude regions experienced periods of high auroral activity. The middle latitudes witnessed periods of moderate auroral activity on this date. The intensity of the auroral activity was insufficient to produce any observations over the lower latitudes. Lunar phase was also unfavorable for observing auroral activity over the middle and low latitudes. HF propagation conditions were generally fair to good over the middle and low latitudes. The high latitudes suffered the worst conditions, with generally fair to very poor conditions throughout the week. VHF conditions were normal over most regions. The exception was 25 May, when periods of minor to major geomagnetic and auroral storming produced conditions favorable for limited and isolated VHF backscatter. Conditions were not favorable for widespread backscatter communications. SHORT TERM SOLAR TERRESTRIAL FORECAST Major flaring from Region 6654 is expected to continue into the short-term (2 to 3 days). This region could remain a prolific flare producer throughout its transit of the solar disk. If this occurs, Region 6654 could become a threat for potential terrestrial impacts shortly. So far, the flaring from this region has been confined to the lower M-class levels and the major flares it has thus far produced have been relatively incapable of producing terrestrial impacts. However, the instability of this region is clearly apparent, and major flares capable of producing moderate to possibly high terrestrial impacts cannot be ruled out. There is a moderately high risk for additional X-class flaring from Region 6654 (approximately 35 to 45%). A proton flare is certainly not out of the question, but is considered to be somewhat improbable given the character of the recent major events spawned by this region. Despite what the models suggest, high latitude navigators, communicators and satellite operators should be aware that a risk does exist for possible proton-related activity in the near future. The probability is currently estimated at near 20%, but this probability will increase rapidly as Region 6654 begins to position itself in a more influential location. There is a fairly high level of uncertainty regarding the possible impacts of flaring from this Region over the next week. This uncertainty is reflected in the confidence levels contained in this report. The forecasts contained herein should therefore be used with this increased flare-impact potential in mind. Conditions could differ radically from these forecasts if particularly powerful flaring develops. Provided no major flares occur which might produce terrestrial geomagnetic impacts, geomagnetic activity should decay to generally quiet to unsettled levels. However, the high level of uncertainty regarding the possible interaction of Region 6654 with terrestrial activity has reduced our confidence in this forecast. If Region 6654 continues to produce frequent M-class flares and/or major M or X class events, a geomagnetic impact is certainly possible this week. Watch the major flare alerts for possible terrestrial impacts. The auroral activity forecasts for the next 6 to 10 days are as uncertain as the geomagnetic forecasts. The possible influence of major flaring from Region 6654 has degraded the confidence of the forecasts. If terrestrial impacts do not materialize, the forecasts should be reliable. Otherwise, consult the major flare alerts for possible terrestrial impacts. HF and VHF propagation conditions are dependent on whether Region 6654 continues to hold together in its present configuration. Further growth and intensification is not out of the question, which would raise additional concerns regarding possible terrestrial impacts. If this region fails to produce any terrestrially influencable flares, expect HF propagation to improve gradually. There is a high probability for relatively frequent SIDs/SWFs over the coming week. Region 6654 is expected to continue to produce ionospheric impacts over the sunlit parts of the Earth which may impede HF performance and briefly improve VHF performance. SUMMARY OF ALL ACTIVE REGIONS VISIBLE ON THE SOLAR DISK AS OF 30 MAY Region # Location LO Area Class LL Spots Magnetic Type -------- -------- --- ---- ----- -- ----- ------------- 6644 N23W22 049 3180 EKI 13 039 BETA 6647 N18W72 099 0180 CAO 07 005 BETA 6648 S14E07 020 0390 HSX 02 001 ALPHA 6649 S12W04 031 0030 BXO 03 003 BETA 6650 N21W65 092 0150 CSO 08 007 BETA 6651 S24W36 063 0240 CAO 09 019 BETA 6652 S09E31 356 1260 DKO 06 013 BETA 6654 N07E40 347 1050 EAI 11 023 BETA 6655 S09E44 343 0030 BXO 03 003 BETA 6656 N13W24 051 0120 DAO 05 006 BETA NOTES: Area is in million square kilometers. Angular extent (LL) and solar longitude (LO) are in degrees. 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 30 MAY REGION LOCATION LO COMMENTS (IF ANY) ------ -------- --- ------------------------------- 6645 N04W63 090 NONE 6653 S22W10 037 ACTIVE REGIONS DUE TO RETURN BETWEEN 30 MAY AND 01 JUNE Region Latitude Longitude (Helio.) ------ -------- --------- 6619 N30 266 6621 N09 266 6622 S27 257 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 | | | | | 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 | Mon. | Tue. | Wed. | Thu. | Anomaly | | Conditions | Given in 3-hourly UT intervals | Intensity | |____________________________________________________________________| NOTES: The data above represents preliminary 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. PEAK PLANETARY 10-DAY GEOMAGNETIC ACTIVITY OUTLOOK (31 MAY - 09 JUNE) ________________________________________________________________________ | EXTREMELY SEVERE | | | | | | | | | | | 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 |Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun| Anomaly | | Conditions | Given in 8-hour intervals | Intensity | |________________________________________________________________________| CONFIDENCE LEVEL: 60% 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 ____________________________________________________________ 267| *F* | HIGH 257| *F* | HIGH 247| ***F** | Moderate 237| ***F** | Moderate 227| F***F**** *** F| Moderate 216| *F***F****F ***** FF| Moderate 206| *F***F****F ******F* FFF| Moderate 196| *** **F***F****F *******F* FFF| Moderate 186|*F***** **F***F****F *******F**F *FFF| Low 176|*F********F***F****F* ********F**F **FFF| Low 165|*F********F***F****F** ********F**F*F ***FFF| Low 155|*F********F***F****F** ***************F**F*F* ****FFF| Low 145|*F********F***F****F*** ***************F**F*F*********FFF| Low 135|*F********F***F****F**********************F**F*F*********FFF| Low 125|*F********F***F****F**********************F**F*F*********FFF| Very Low ------------------------------------------------------------ Cumulative 60 day Solar Activity Record Start Date: April 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 _________________________________________________________________ | 275 | | | | | | | | | | | | | | | | | | | | | | 265 | | | | |**|**|**|**| | | | | | | | | | | | | | 254 | | |**|**| | | | |**| | | | | | | | | | | | | 244 |**|**| | | | | | | |**| | | | | | | | | | | | 233 | | | | | | | | | | |**| | | | | | | | | | | 223 | | | | | | | | | | | |**| | | | | | | | | | 213 | | | | | | | | | | | | |**| | | | | | | | | 202 | | | | | | | | | | | | | |**| | | | | | | | 192 | | | | | | | | | | | | | | |**| | | | | | | 181 | | | | | | | | | | | | | | | |**|**| | | | | 171 | | | | | | | | | | | | | | | | | |**|**| | | 160 | | | | | | | | | | | | | | | | | | | |**| | 150 | | | | | | | | | | | | | | | | | | | | | |-----|--|--|--|--|--|--|--|--|--|--|--|--|--|--|--|--|--|--|--|--| |Solar|31|01|02|03|04|05|06|07|08|09|10|11|12|13|14|15|16|17|18|19| |Flux | | June | ----------------------------------------------------------------- CONFIDENCE LEVEL: 60% HF RADIO SIGNAL PROPAGATION PREDICTIONS (31 MAY - 09 JUNE) High Latitude Paths ________________________________________________________ | EXTREMELY GOOD | | | | | | | | | | | | VERY GOOD | | | | | | | | | | | CONFIDENCE | GOOD | | | | |* |* | | | | | LEVEL | FAIR |* *|***|***|***| **| **|***|* *|* *|***| ------- | POOR | * | | | | | | | * | * | | 55% | VERY POOR | | | | | | | | | | | | EXTREMELY POOR | | | | | | | | | | | |----------------|---|---|---|---|---|---|---|---|---|---| | PROPAGATION |Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun| | QUALITY | Given in 8-Hour UT Intervals | -------------------------------------------------------- Middle Latitude Paths ________________________________________________________ | EXTREMELY GOOD | | | | | | | | | | | | VERY GOOD | | | |* |* |* | | | | | CONFIDENCE | GOOD |***|***|***| **| **| **|***|* *|* *|***| LEVEL | FAIR | | | | | | | | * | * | | ------- | POOR | | | | | | | | | | | 60% | VERY POOR | | | | | | | | | | | | EXTREMELY POOR | | | | | | | | | | | |----------------|---|---|---|---|---|---|---|---|---|---| | PROPAGATION |Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun| | QUALITY | Given in 8-Hour UT Intervals | -------------------------------------------------------- Low Latitude Paths ________________________________________________________ | EXTREMELY GOOD | | | | | | | | | | | | VERY GOOD | | | |* |* |* |* | | | | CONFIDENCE | GOOD |***|***|***| **| **| **| **|***|***|***| LEVEL | FAIR | | | | | | | | | | | ------- | POOR | | | | | | | | | | | 60% | VERY POOR | | | | | | | | | | | | EXTREMELY POOR | | | | | | | | | | | |----------------|---|---|---|---|---|---|---|---|---|---| | PROPAGATION |Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun| | QUALITY | Given in 8-Hour UT Intervals | -------------------------------------------------------- NOTES: NORTHERN HEMISPHERE SOUTHERN HEMISPHERE High latitudes >= 55 deg. N. | High latitudes >= 55 deg. S. Middle latitudes >= 40 < 55 deg. N. | Middle latitudes >= 35 < 55 deg. S. Low latitudes < 40 deg. N. | Low latitudes < 35 deg. S. POTENTIAL VHF DX PROPAGATION PREDICTIONS (31 MAY - 09 JUNE) INCLUDES SID AND AURORAL BACKSCATTER ENHANCEMENT PREDICTIONS HIGH LATITUDES __________________________________________________ ___________________ | SIGNAL | Given in 8 hour local time intervals | | SID ENHANCEMENT | | QUALITY |Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun| |F|S|S|M|T|W|T|F|S|S| |__________|___|___|___|___|___|___|___|___|___|___| |-|-|-|-|-|-|-|-|-|-| | 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 |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 LATITUDES __________________________________________________ ___________________ | SIGNAL | Given in 8 hour local time intervals | | SID ENHANCEMENT | | QUALITY |Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun| |F|S|S|M|T|W|T|F|S|S| |__________|___|___|___|___|___|___|___|___|___|___| |-|-|-|-|-|-|-|-|-|-| | 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 |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 LATITUDES __________________________________________________ ___________________ | SIGNAL | Given in 8 hour local time intervals | | SID ENHANCEMENT | | QUALITY |Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun| |F|S|S|M|T|W|T|F|S|S| |__________|___|___|___|___|___|___|___|___|___|___| |-|-|-|-|-|-|-|-|-|-| | 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 |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 50 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. For more information, request the document "Understanding Solar Terrestrial Reports" from: "oler@hg.uleth.ca". AURORAL ACTIVITY PREDICTIONS (31 MAY - 09 JUNE) High Latitude Locations ________________________________________________________ | EXTREMELY HIGH | | | | | | | | | | | CONFIDENCE | VERY HIGH | | | | | | | | | | | LEVEL | HIGH | | | | | | | | | | | ------- | MODERATE | | | | | | | | * | * | | 55% | LOW |***|***| * | * | * | * | **|***|***|***| | NOT VISIBLE |***|***|***|***|***|***|***|***|***|***| |----------------|---|---|---|---|---|---|---|---|---|---| | AURORAL |Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun| | INTENSITY | Eve.Twilight/Midnight/Morn.Twilight | -------------------------------------------------------- Middle Latitude Locations ________________________________________________________ | EXTREMELY HIGH | | | | | | | | | | | CONFIDENCE | VERY HIGH | | | | | | | | | | | LEVEL | HIGH | | | | | | | | | | | ------- | MODERATE | | | | | | | | | | | 60% | LOW | | | | | | | | * | * | | | NOT VISIBLE |***|***|***|***|***|***|***|***|***|***| |----------------|---|---|---|---|---|---|---|---|---|---| | AURORAL |Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun| | INTENSITY | Eve.Twilight/Midnight/Morn.Twilight | -------------------------------------------------------- Low Latitude Locations ________________________________________________________ | EXTREMELY HIGH | | | | | | | | | | | CONFIDENCE | VERY HIGH | | | | | | | | | | | LEVEL | HIGH | | | | | | | | | | | ------- | MODERATE | | | | | | | | | | | 65% | LOW | | | | | | | | | | | | NOT VISIBLE |***|***|***|***|***|***|***|***|***|***| |----------------|---|---|---|---|---|---|---|---|---|---| | AURORAL |Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|Sun| | 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 #647 *******************