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Щоденний бюлетень про сонячну та геомагнітну активність від SIDC

Випущено: 2023 Aug 18 1241 UTC

Прогноз SIDC

Сонячні спалахи

C-class flares expected, (probability >=50%)

Геомагнетизм

Active conditions expected (A>=20 or K=4)

Сонячні протони

Quiet

	10 см потік	Ap
18 Aug 2023	153	013
19 Aug 2023	151	014
20 Aug 2023	148	008

Сонячно-активні області та спалахи

The solar flaring activity was at low levels. The largest flare was a C5.1 flare peaking at 12:40 UTC on August 17, this originated near the west limb associated with NOAA AR3397, which has now rotated over the limb. NOAA AR 3403 decayed over the period and was quiet. NOAA AR3405 also produced C-class flares and has been split into two regions including the small new region NOAA AR3411. NOAA AR3407 and AR3410 were stable and quiet. NOAA ARs 3406, 3408 both decayed into plage region. NOAA AR3409, which began to emerge yesterday has continued to grow and produced low level C-class flares. The solar flaring activity is expected to be at low levels over the next 24 hours with C-class flares likely and a low chance for isolated M-class flares.

Корональні викиди маси

There were no Earth-directed Coronal Mass Ejections (CMEs) detected in the available coronagraph observations.

Сонячний вітер

The solar wind parameters reflected a weak negative polarity high speed stream arrival. The interplanetary magnetic field was slightly enhanced, with a significant increase around 02:00 UTC on August 18, when it jumped from 9 and 14 nT. Bz had a minimum value of -11nT. The solar wind speed increased gradually from 02:00 UTC, from 300km/s to values near 500 km/s. The interplanetary magnetic field orientation switched to the negative sector (field directed towards the Sun) from 19:00 UTC on August 17. The solar wind parameters are expected to remain enhanced on August 18 and 19, while the Earth remains under the influence for the high-speed stream.

Геомагнетизм

During last 24 hours the geomagnetic conditions were at quiet to unsettled levels (NOAA KP 1-3 and K-Bel 1-3). Geomagnetic conditions are expected to be at unsettled levels, with active periods possible on August 18 and 19, due to the ongoing high speed stream influence.

Рівні потоку протонів

Over the past 24 hours the greater than 10 MeV GOES proton flux was at nominal levels and is expected to remain so over the next days.

Потоки електронів на геостаціонарній орбіті

The greater than 2 MeV electron flux remained below the 1000 pfu threshold as measured by GOES 16. It is expected to remain below this threshold over the next days. The 24 hour electron fluence was at nominal levels. The electron fluence is expected to be at nominal levels for the next days.

Розрахунок міжнародної кількості сонячних плям станом на сьогодні (ISN): 125, за даними 14 станцій.

Сонячні індекси за 17 Aug 2023

Число Вольфа, Катанія	///
Сонячний потік 10 см	152
AK Chambon La Forêt	011
AK Wingst	010
Розрахунковий індекс Ap	009
Розрахункова міжнародна кількість сонячних плям	149 - За даними 24 станцій

Зведення помітних подій

Надано Центром Аналізу Даних Сонячного Впливу (SIDC)© - SIDC - Оброблено SpaceWeatherLive

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