Minimo solare



  • Domani finisce l'anno: e il minimo solare? ha battuto il record? sono sparite le macchie in dicembre o sono sparite solo le notizie? fateci sapere come è andata a finire :!: :!: :?: :?:



  • @stevengal:

    Domani finisce l'anno: e il minimo solare? ha battuto il record? sono sparite le macchie in dicembre o sono sparite solo le notizie? fateci sapere come è andata a finire :!: :!: :?: :?:

    Beh… x qnt ne sappia io.... il minimo persiste...... !!!!! Incredibilmente.....!!!!!!!!!!!!!! Il Sole ci vuol fare una sorpresa.... ( terribile??? )



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  • Da quello che leggo in giro è si vero che il sole mostra segni di attività ma rimane sempre sotto al normale.
    Ci sono degli spot che nascono e muoiono, altri che portano a qualche evento ma nulla di eclatante.
    Prepared jointly by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center and the U.S. Air Force. Updated 2011 Sep 03 2200 UTC Joint USAF/NOAA Report of Solar and Geophysical Activity SDF Number 246 Issued at 2200Z on 03 Sep 2011 IA. Analysis of Solar Active Regions and Activity from 02/2100Z to 03/2100Z: Solar activity was at low levels due to several C-class events observed during the period. As it approached the west limb, Region 1280 (N12W78) produced three C-class flares, the largest a C2/Sf at 03/1736Z. Region 1281 (S19W10) produced a C2/Sf at 03/0756Z. Region 1282 (N23W52) indicated decay in its intermediate spots, but developed a delta magnetic structure in the large leader spot. Two new regions were numbered during the period. New Region 1286 (N20W57) rapidly emerged as an eight spot D-type group and produced a C1 x-ray event at 03/1846Z. New Region 1287 (S30E64) rotated onto the disk as a three spot C-type group. All remaining regions were quiet and stable. No Earth-directed CMEs were detected during the period. IB. Solar Activity Forecast: Solar activity is expected to be low for the next three days (04 - 06 September) with a slight chance for M-class activity. IIA. Geophysical Activity Summary 02/2100Z to 03/2100Z: The geomagnetic field was at quiet to unsettled levels with an isolated active period observed at Boulder between 03/0900Z - 1200Z. At about 03/0100Z, observations from the ACE spacecraft indicated an increase in temperature, density and wind speed. These increases, coupled with a brief period of southward Bz to -12nT and an increase in Bt to 13nT, were indicative of a co-rotating interaction region in advance of a coronal hole high speed stream. During the period, wind speed increased from about 275 km/s to near 425 km/s while Bz generally fluctuated between +/- 5 nT. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels, with a chance for isolated active periods, on day one (04 September) as the coronal hole high speed stream (CH HSS) persists. Days two and three (05 - 06 September) will see a return to mostly quiet levels as the CH HSS moves out of a geoeffective position.



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