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Denní bulletin o sluneční a geomagnetické aktivitě ze SIDC

Vydáno: 2025 May 16 1231 UTC

SIDC Předpověď

Sluneční erupce

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

Geomagnetismus

Moderate (ISES: Major) magstorm expected (A>=50 or K=6)

Sluneční protony

Quiet

	10cm tok	Ap
16 May 2025	122	017
17 May 2025	124	024
18 May 2025	125	020

Slunečně aktivní oblasti a vzplanutí

Solar flaring activity was moderate over the past 24 hours, with one M-class flare and a few C-class flares. The strongest flare was a M2.1 flare (SIDC Flare 4395) peaking at 17:21 UTC on May 15, associated with SIDC Sunspot Group 496 (NOAA Active Region 4087, magnetic type beta-delta). There are currently five numbered active regions on the solar disk. The most complex one is SIDC Sunspot Group 496 (NOAA Active Region 4087). SIDC Sunspot Group 492 (NOAA Active Region 4082) has rotated behind the west limb. The solar flaring activity is expected to be low to moderate over the next 24 hours, with C-class flares expected, a chance for M-class flares and a small chance for X-class flares.

Vyhazování koronální hmoty

No Earth-directed Coronal Mass Ejections (CMEs) were observed in the available coronagraph imagery in the last 24 hours.

Koronální díra

An elongated, mid-latitude, positive polarity coronal hole (SIDC Coronal Hole 104) continues to cross the central meridian since May 15. An associated high-speed stream may arrive at Earth starting from May 18.

Solární bouře

The solar wind conditions (ACE and DSCOVR) are gradually returning to the slow solar wind regime, under the waning influence of the high-speed stream from the equatorial, negative polarity coronal hole (SIDC Coronal Hole 114). Speed values ranged between 360 km/s and 470 km/s. The interplanetary magnetic field values were between 1 nT and 8 nT. The Bz component varied between -6 nT and 4 nT. The interplanetary magnetic field angle phi was in the negative sector until 03:00 UTC on May 16, when it flipped to the positive sector. Enhanced solar wind conditions are expected over the next 24 hours, due to the expected arrival of the ICME associated with the Coronal Mass Ejection (CME) observed around 23:00 UTC on May 12.

Geomagnetismus

Geomagnetic conditions globally were mostly at quiet to unsettled levels (NOAA Kp 2 to 3). Geomagnetic conditions locally were mostly at quiet to unsettled levels (K BEL 2 to 3). Minor storm conditions (NOAA Kp 5, K BEL 5), with possible isolated moderate storm conditions (NOAA Kp 6, K BEL 6), are expected over the next 24 hours due to the expected arrival of the ICME associated with the Coronal Mass Ejection (CME) observed around 23:00 UTC on May 12.

Úrovně protonového toku

The greater than 10 MeV proton flux was below the 10 pfu threshold level over the past 24 hours. It is expected to remain below the threshold level over the next 24 hours.

Elektronové toky na geostacionární oběžné dráze

The greater than 2 MeV electron flux measured by GOES 18 and GOES 19 was below the 1000 pfu threshold in the last 24 hours and is expected to remain so over the next 24 hours. The 24-hour electron fluence is presently at normal levels and is expected to remain so over the next 24 hours.

Dnešní odhadovaný mezinárodní počet slunečních skvrn (ISN): 067, na základě 26 stanic.

Solární indexy za 15 May 2025

Wolfovo číslo Catania	///
10cm sluneční tok	119
AK Chambon La Forêt	018
AK Wingst	015
Odhadovaný Ap	016
Odhadovaný mezinárodní počet slunečních skvrn	046 - Na základě 29 stanic

Souhrn významných událostí

Poskytuje Centrum pro analýzu dat o solárních vlivech© - SIDC - Zpracováno SpaceWeatherLive

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