Просмотр архива за суббота, 28 апреля 2001
Отчет о солнечной активности
Любая солнечная вспышка, упомянутая в этом расчете, имеет масштабирующий коэффициент, применяемый Центром прогнозирования космической погоды (SWPC). Из-за него солнечные вспышки здесь на 42% слабее, чем в научных данных. Из наших архивов этот коэффициент был удален, чтобы показать реальные величины вспышек.
Отчет о солнечно-геофизической активности 2001 Apr 28 2200 UTC
Подготовлено NOAA © SWPC и представлено SpaceWeatherLive.comСовместный отчет USAF/NOAA о солнечной и геофизической активности
Количество SD 118 на уровне 2200Z 28 Apr 2001
IA. Анализ активных солнечных регионов и активности от 27 - 2100Z до 28 - 2100Z
Solar activity dropped to low levels. Region 9433
(N17W50) produced isolated C-class flares, the largest of which was
a C7/1f at 28/0934 UTC. Gradual decay continued in the leading and
intermediate portions of this region. However, no decay was evident
within its trailing spots, where a strong magnetic delta
configuration remained. Region 9441 (N07E23) continued a gradual
growth phase that began on 27 April, but the region remained a
moderate-sized, simply-structured bipole. New Regions 9444 (S11E67)
and 9445 (N23E76) were assigned.
IB. Прогноз солнечной активности
Solar activity is expected to be at
moderate to high levels. Region 9433 is expected to produce isolated
M-class flares. This region could also produce an isolated major
flare during the period.
IIA. Обзор геофизической активности от 27 - 2100Z до 28 - 2100Z
Geomagnetic field activity ranged from quiet to minor storm levels.
An interplanetary shock at the leading edge of a CME passed the ACE
spacecraft at 28/0432 UTC, followed by a sudden impulse (SI) at
28/0520 UTC (76 nT, as measured by the Boulder USGS magnetometer).
The source for the CME was an M7/2b flare on 26 April. Field
activity increased to unsettled to minor storm levels following the
SI. The greater than 10 MeV proton flux at geosynchronous orbit
briefly crossed event threshold in response to the shock passage.
The greater than 10 MeV event began at 28/0430 UTC, reached a
maximum of 57 PFU at 28/0500 UTC, then ended at 28/0520 UTC. Proton
fluxes had decreased to near background levels by the close of the
period.
IIB. Прогноз геофизической активности
Geomagnetic field activity is
expected to be at unsettled to active levels through midday, 29
April as the disturbance gradually subsides. Quiet to unsettled
levels are expected for the remainder of the period. Region 9433
could produce another proton flare before it crosses the west limb
on 02 May. The greater than 2 MeV electron flux at geosynchronous
orbit may reach high levels during the first half of the period.
III. Вероятность события от 29 - Apr до 01 - May
| M-класс | 75% | 75% | 75% |
| X-класс | 20% | 20% | 20% |
| Протон | 20% | 20% | 20% |
| PCAF | yellow
|
IV. Радиоизлучение λ = 10,7см
Наблюдаемый 28 Apr 188
Прогнозируемый 29 Apr-01 May 185/180/175
среднее значение за последние 3 месяца 28 Apr 167
V. Геомагнитные индексы
Наблюдаемый Afr/Ap 27 Apr 003/006
По оценкам Afr/Ap 28 Apr 026/028
Прогнозируемый Afr/Ap 29 Apr-01 May 015/015-012/010-010/010
VI. Вероятность геомагнитной активности с 29 - Apr до 01 - May
| A. Средние широты |
| Активно | 30% | 25% | 20% |
| Слабый шторм | 15% | 10% | 10% |
| Большой шторм | 10% | 05% | 01% |
| B. Высокие широты |
| Активно | 35% | 30% | 25% |
| Слабый шторм | 20% | 15% | 10% |
| Большой шторм | 15% | 10% | 05% |
Все время в UTC
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