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Larghezza finestra: 640 x 480 800 x 600 1024 x 768 1280 x 1024 Nome Utente: Password: Modo: Base  Aiuto  Finestra  Formato: Carattere Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Grandezza 1 2 3 4 5 6   Colore Nero Rosso Giallo Rosa Verde Arancione Viola Blu Beige Bordò Verde Oliva Blu Marino Marrone Verde Limone Icona Messaggio:                             Messaggio:   * Il codice HTML è OFF * Il Codice Forum è ON Faccine [quote][i]Messaggio inserito da ik3iul[/i] [br]#--------- :Product: SWPC Space Weather Alerts ALTS.txt :Issued: 2017 Sep 06 1348 UTC # Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # See http://swpc.noaa.gov/alerts/ for description and other displays # Send comments and suggestions to SWPC.Webmaster@noaa.gov # # SWPC Space Weather Alerts Issued in the last 24 hours #--------------------------------------------------------------------- Space Weather Message Code: WARPC0 Serial Number: 81 Issue Time: 2017 Sep 06 1302 UTC WARNING: Proton 100MeV Integral Flux above 1pfu expected Valid From: 2017 Sep 06 1305 UTC Valid To: 2017 Sep 06 2359 UTC Warning Condition: Onset www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: An enhancement in the energetic portion of the solar radiation spectrum may indicate increased biological risk to astronauts or passengers and crew in high latitude, high altitude flights. Additionally, energetic particles may represent an increased risk to all satellite systems susceptible to single event effects. This information should be used in conjunction with the current Solar Radiation Storm conditions when assessing overall impact. #------------------------------------------------- Space Weather Message Code: SUMX01 Serial Number: 115 Issue Time: 2017 Sep 06 1245 UTC SUMMARY: X-ray Event exceeded X1 Begin Time: 2017 Sep 06 1153 UTC Maximum Time: 2017 Sep 06 1202 UTC End Time: 2017 Sep 06 1210 UTC X-ray Class: X9.3 NOAA Scale: R3 - Strong Comment: Source was Region 2673 www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point. Radio - Wide area blackout of HF (high frequency) radio communication for about an hour. #------------------------------------------------- Space Weather Message Code: ALTTP2 Serial Number: 1058 Issue Time: 2017 Sep 06 1212 UTC ALERT: Type II Radio Emission Begin Time: 2017 Sep 06 1202 UTC Estimated Velocity: 1969 km/s www.swpc.noaa.gov/noaa-scales-explanation Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event. #------------------------------------------------- Space Weather Message Code: ALTTP4 Serial Number: 540 Issue Time: 2017 Sep 06 1210 UTC ALERT: Type IV Radio Emission Begin Time: 2017 Sep 06 1201 UTC www.swpc.noaa.gov/noaa-scales-explanation Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms. #------------------------------------------------- Space Weather Message Code: SUM10R Serial Number: 697 Issue Time: 2017 Sep 06 1209 UTC SUMMARY: 10cm Radio Burst Begin Time: 2017 Sep 06 1154 UTC Maximum Time: 2017 Sep 06 1156 UTC End Time: 2017 Sep 06 1157 UTC Duration: 3 minutes Peak Flux: 12000 sfu Latest Penticton Noon Flux: 121 sfu www.swpc.noaa.gov/noaa-scales-explanation Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications. #------------------------------------------------- Space Weather Message Code: ALTXMF Serial Number: 269 Issue Time: 2017 Sep 06 1200 UTC ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2017 Sep 06 1156 UTC NOAA Scale: R2 - Moderate www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap. #------------------------------------------------- Space Weather Message Code: SUMX01 Serial Number: 114 Issue Time: 2017 Sep 06 1008 UTC SUMMARY: X-ray Event exceeded X1 Begin Time: 2017 Sep 06 0848 UTC Maximum Time: 2017 Sep 06 0910 UTC End Time: 2017 Sep 06 0959 UTC X-ray Class: X2.2 Optical Class: 2b Location: S08W33 NOAA Scale: R3 - Strong www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point. Radio - Wide area blackout of HF (high frequency) radio communication for about an hour. #------------------------------------------------- Space Weather Message Code: SUM10R Serial Number: 696 Issue Time: 2017 Sep 06 0934 UTC SUMMARY: 10cm Radio Burst Begin Time: 2017 Sep 06 0903 UTC Maximum Time: 2017 Sep 06 0904 UTC End Time: 2017 Sep 06 0909 UTC Duration: 6 minutes Peak Flux: 459 sfu Latest Penticton Noon Flux: 121 sfu www.swpc.noaa.gov/noaa-scales-explanation Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications. #------------------------------------------------- Space Weather Message Code: ALTXMF Serial Number: 268 Issue Time: 2017 Sep 06 0912 UTC ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2017 Sep 06 0904 UTC NOAA Scale: R2 - Moderate www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap. #------------------------------------------------- Space Weather Message Code: SUMPX2 Serial Number: 40 Issue Time: 2017 Sep 06 0620 UTC SUMMARY: Proton Event 10MeV Integral Flux exceeded 100pfu Begin Time: 2017 Sep 05 0715 UTC Maximum Time: 2017 Sep 05 1930 UTC End Time: 2017 Sep 05 2350 UTC Maximum 10MeV Flux: 210 pfu NOAA Scale: S2 - Moderate Comment: Greater than 10MeV @ 10pfu (S1-Minor) event remains in effect. www.swpc.noaa.gov/noaa-scales-explanation #------------------------------------------------- Space Weather Message Code: ALTEF3 Serial Number: 2655 Issue Time: 2017 Sep 06 0501 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 2654 Begin Time: 2017 Sep 01 1350 UTC Yesterday Maximum 2MeV Flux: 3777 pfu www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. #------------------------------------------------- Space Weather Message Code: WARPX1 Serial Number: 464 Issue Time: 2017 Sep 05 2139 UTC EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected Extension to Serial Number: 463 Valid From: 2017 Sep 05 0030 UTC Now Valid Until: 2017 Sep 07 0400 UTC Warning Condition: persistence Predicted NOAA Scale: S2 - Moderate www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies. #------------------------------------------------- Space Weather Message Code: WATA50 Serial Number: 62 Issue Time: 2017 Sep 05 1714 UTC WATCH: Geomagnetic Storm Category G3 Predicted Highest Storm Level Predicted by Day: Sep 06: G3 (Strong) Sep 07: G3 (Strong) Sep 08: None (Below G1) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude. Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices. Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur. Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur. Radio - HF (high frequency) radio may be intermittent. Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon. #------------------------------------------------- ------------------------------------------------------------ Space Weather Message Code: WATA50 Serial Number: 62 Issue Time: 2017 Sep 05 1714 UTC WATCH: Geomagnetic Storm Category G3 Predicted Highest Storm Level Predicted by Day: Sep 06: G3 (Strong) Sep 07: G3 (Strong) Sep 08: None (Below G1) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude. Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices. Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur. Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur. Radio - HF (high frequency) radio may be intermittent. Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon. #------------------------------------------------- Space Weather Message Code: WATA30 Serial Number: 163 Issue Time: 2017 Sep 05 1313 UTC Geomagnetic Activity Probabilities 05 Sep-07 Sep A. Middle Latitudes Active 20/15/15 Minor Storm 05/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor Storm 20/15/15 Major-severe storm 20/05/10 :Product: Solar Region Summary :Issued: 2017 Sep 05 0030 UTC # Prepared jointly by the U.S. Dept. of Commerce, NOAA, # Space Weather Prediction Center and the U.S. Air Force. # Joint USAF/NOAA Solar Region Summary SRS Number 248 Issued at 0030Z on 05 Sep 2017 Report compiled from data received at SWO on 04 Sep I. Regions with Sunspots. Locations Valid at 04/2400Z Nmbr Location Lo Area Z LL NN Mag Type 2673 S08W16 119 0680 Dkc 07 28 Beta-Gamma-Delta 2674 N14W01 104 0740 Fhi 18 34 Beta 2675 S02W76 179 0010 Bxo 05 04 Beta 2676 S09W65 168 0030 Cro 08 04 Beta 2677 N19E51 052 0010 Axx 01 02 Alpha IA. H-alpha Plages without Spots. Locations Valid at 04/2400Z Sep Nmbr Location Lo None II. Regions Due to Return 05 Sep to 07 Sep Nmbr Lat Lo None :Product: Solar and Geophysical Activity Summary :Issued: 2017 Sep 05 0245 UTC # Prepared jointly by the U.S. Dept. of Commerce, NOAA, # Space Weather Prediction Center and the U.S. Air Force. # Joint USAF/NOAA Solar and Geophysical Activity Summary SGAS Number 248 Issued at 0245Z on 05 Sep 2017 This report is compiled from data received at SWO on 04 Sep A. Energetic Events Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0042 0042 0042 140 0111 0111 0111 1000 0212 0213 0213 410 0218 0222 0229 2674 C1.1 1500 0536 0549 0605 2673 S10W04 M1.2 1f 0953 0953 0953 210 1156 1156 1156 1600 1511 1530 1533 2673 S06W13 M1.5 1n 130 100 1720 1720 1720 330 1756 1756 1756 100 1802 1803 1803 100 1805 1822 1831 2673 M1.0 1846 1937 1952 2673 M1.7 IV 1900 1900 1900 120 1959 2002 2006 2673 M1.5 2011 2050 2119 720 2100 2027 2050 2119 1600 II 2028 2033 2037 2673 S11W16 M5.5 3b 2203 2203 2203 800 2210 2214 2219 2673 M2.1 B. Proton Events: The greater than 10 MeV proton flux values observed a slight enhancement that was likely associated with the M5 flare from Region 2673, but remained below alert thresholds. C. Geomagnetic Activity Summary: The geomagnetic field was at quiet to unsettled levels with an isolated active periods, likely associated with sustained -Bz. D. Stratwarm: Not Available E. Daily Indices: (real-time preliminary/estimated values) 10 cm 183 SSN 122 Afr/Ap 016/017 X-ray Background C1.6 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 8.9e+07 GT 10 MeV 2.5e+04 p/(cm2-ster-day) (GOES-13 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 4.50e+08 e/(cm2-ster-day) (GOES-13 satellite synchronous orbit W75 degrees) 3 Hour K-indices: Boulder 4 4 2 2 2 3 4 4 Planetary 4 3 2 2 2 2 4 4 F. Comments: None Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels on day one (05 Sep) and quiet levels on days two and three (06 Sep, 07 Sep). Protons have a slight chance of crossing threshold on days one, two, and three (05 Sep, 06 Sep, 07 Sep). III. Event probabilities 05 Sep-07 Sep Class M 71/71/71 Class X 25/25/25 Proton 10/10/10 PCAF green :Product: SWPC Space Weather Alerts ALTS.txt :Issued: 2017 Sep 05 1748 UTC # Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # See http://swpc.noaa.gov/alerts/ for description and other displays # Send comments and suggestions to SWPC.Webmaster@noaa.gov # # SWPC Space Weather Alerts Issued in the last 24 hours #--------------------------------------------------------------------- Space Weather Message Code: WATA50 Serial Number: 62 Issue Time: 2017 Sep 05 1714 UTC WATCH: Geomagnetic Storm Category G3 Predicted Highest Storm Level Predicted by Day: Sep 06: G3 (Strong) Sep 07: G3 (Strong) Sep 08: None (Below G1) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude. Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices. Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur. Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur. Radio - HF (high frequency) radio may be intermittent. Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon. #------------------------------------------------- Space Weather Message Code: WATA30 Serial Number: 163 Issue Time: 2017 Sep 05 1313 UTC WATCH: Geomagnetic Storm Category G2 Predicted Highest Storm Level Predicted by Day: Sep 05: None (Below G1) Sep 06: G2 (Moderate) Sep 07: G2 (Moderate) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state. #------------------------------------------------- Space Weather Message Code: ALTTP4 Serial Number: 539 Issue Time: 2017 Sep 05 1221 UTC ALERT: Type IV Radio Emission Begin Time: 2017 Sep 05 1139 UTC www.swpc.noaa.gov/noaa-scales-explanation Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms. #------------------------------------------------- Space Weather Message Code: WARPX1 Serial Number: 463 Issue Time: 2017 Sep 05 1137 UTC EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected Extension to Serial Number: 462 Valid From: 2017 Sep 05 0030 UTC Now Valid Until: 2017 Sep 05 2359 UTC Warning Condition: persistence Predicted NOAA Scale: S1 - Minor www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies. #------------------------------------------------- Space Weather Message Code: ALTEF3 Serial Number: 2654 Issue Time: 2017 Sep 05 0826 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 2653 Begin Time: 2017 Sep 01 1350 UTC Yesterday Maximum 2MeV Flux: 15827 pfu www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. #------------------------------------------------- Space Weather Message Code: ALTPX2 Serial Number: 59 Issue Time: 2017 Sep 05 0732 UTC ALERT: Proton Event 10MeV Integral Flux exceeded 100pfu Begin Time: 2017 Sep 05 0715 UTC NOAA Scale: S2 - Moderate www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Radiation - Passengers and crew in high latitude, high altitude flights may experience small, increased radiation exposures. Spacecraft - Infrequent single-event upsets to satellites are possible. Radio - Small effects on polar HF (high frequency) propagation resulting in fades at lower frequencies. #------------------------------------------------- Space Weather Message Code: ALTTP4 Serial Number: 538 Issue Time: 2017 Sep 05 0601 UTC ALERT: Type IV Radio Emission Begin Time: 2017 Sep 05 0500 UTC www.swpc.noaa.gov/noaa-scales-explanation Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms. #------------------------------------------------- Space Weather Message Code: ALTPX1 Serial Number: 316 Issue Time: 2017 Sep 05 0039 UTC ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu Begin Time: 2017 Sep 05 0038 UTC NOAA Scale: S1 - Minor www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies. #------------------------------------------------- Space Weather Message Code: WARPX1 Serial Number: 462 Issue Time: 2017 Sep 05 0030 UTC WARNING: Proton 10MeV Integral Flux above 10pfu expected Valid From: 2017 Sep 05 0030 UTC Valid To: 2017 Sep 05 1200 UTC Warning Condition: Onset Predicted NOAA Scale: S1 - Minor www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies. #------------------------------------------------- Space Weather Message Code: ALTK05 Serial Number: 1146 Issue Time: 2017 Sep 05 0000 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Sep 04 2359 UTC Synoptic Period: 2100-2400 UTC Active Warning: Yes NOAA Scale: G1 - Minor www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. #------------------------------------------------- Space Weather Message Code: WARK04 Serial Number: 3306 Issue Time: 2017 Sep 04 2325 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3305 Valid From: 2017 Sep 04 1940 UTC Now Valid Until: 2017 Sep 05 0900 UTC Warning Condition: Persistence www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. #------------------------------------------------- Space Weather Message Code: WARK05 Serial Number: 1391 Issue Time: 2017 Sep 04 2318 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2017 Sep 04 2317 UTC Valid To: 2017 Sep 05 0600 UTC Warning Condition: Onset NOAA Scale: G1 - Minor www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. #------------------------------------------------- Space Weather Message Code: SUM10R Serial Number: 695 Issue Time: 2017 Sep 04 2136 UTC SUMMARY: 10cm Radio Burst Begin Time: 2017 Sep 04 2027 UTC Maximum Time: 2017 Sep 04 2050 UTC End Time: 2017 Sep 04 2119 UTC Duration: 52 minutes Peak Flux: 1600 sfu Latest Penticton Noon Flux: 183 sfu Comment: Castelli-U www.swpc.noaa.gov/noaa-scales-explanation Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications. #------------------------------------------------- Space Weather Message Code: ALTTP2 Serial Number: 1057 Issue Time: 2017 Sep 04 2112 UTC ALERT: Type II Radio Emission Begin Time: 2017 Sep 04 2042 UTC Estimated Velocity: 1472 km/s Comment: Uncertain quality from Sagamore Hill, no other observatory reports at this time. www.swpc.noaa.gov/noaa-scales-explanation Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event. #------------------------------------------------- Space Weather Message Code: ALTK04 Serial Number: 2001 Issue Time: 2017 Sep 04 2103 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2017 Sep 04 2059 UTC Synoptic Period: 1800-2100 UTC Active Warning: Yes www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. #------------------------------------------------- Space Weather Message Code: SUMXM5 Serial Number: 150 Issue Time: 2017 Sep 04 2050 UTC SUMMARY: X-ray Event exceeded M5 Begin Time: 2017 Sep 04 2028 UTC Maximum Time: 2017 Sep 04 2033 UTC End Time: 2017 Sep 04 2037 UTC X-ray Class: M5.5 NOAA Scale: R2 - Moderate Comment: Flare occurred from Region 2673 www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth. Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes. #------------------------------------------------- Space Weather Message Code: ALTXMF Serial Number: 267 Issue Time: 2017 Sep 04 2035 UTC ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2017 Sep 04 2033 UTC NOAA Scale: R2 - Moderate www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap. #------------------------------------------------- Space Weather Message Code: SUM10R Serial Number: 694 Issue Time: 2017 Sep 04 2032 UTC SUMMARY: 10cm Radio Burst Begin Time: 2017 Sep 04 2011 UTC Maximum Time: 2017 Sep 04 2013 UTC End Time: 2017 Sep 04 2018 UTC Duration: 5 minutes Peak Flux: 200 sfu Latest Penticton Noon Flux: 120 sfu www.swpc.noaa.gov/noaa-scales-explanation Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications. #------------------------------------------------- Space Weather Message Code: ALTTP4 Serial Number: 537 Issue Time: 2017 Sep 04 1949 UTC ALERT: Type IV Radio Emission Begin Time: 2017 Sep 04 1938 UTC www.swpc.noaa.gov/noaa-scales-explanation Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms. #------------------------------------------------- Space Weather Message Code: WARK04 Serial Number: 3305 Issue Time: 2017 Sep 04 1941 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2017 Sep 04 1940 UTC Valid To: 2017 Sep 04 2359 UTC Warning Condition: Onset www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. #------------------------------------------------- [b]Immagine:[/b][br][img]/Public/data/ik3iul/20171017145834_whistler.jpg[/img][br][size=1] 68,19 KB[/size=1] Passiamo dai whistler a ZERO MACCHIE. PROPAGAZIONE ON LINE: http://www.dxmaps.com/spots/mapg.php?Lan=&Frec=&ML=&Map=&HF=&DXC=ING2&GL= [b]Immagine:[/b][br][img]/Public/data/ik3iul/2017101722826_EISNcurrent.png[/img][br][size=1] 44,24 KB[/size=1] [/quote]    Allega file   Clicca qui per inserire la tua firma nel messaggio.