Archiv von Samstag, 27 Juli 2024 anzeigen

Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2024 Jul 27 1258 UTC

Vorhersage des SIDC

Sonneneruptionen

M-class flares expected (probability >=50%)

Geomagnetismus

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

Sonnenprotonen

Quiet

	10cm Fluss	Ap
27 Jul 2024	180	015
28 Jul 2024	177	019
29 Jul 2024	175	007

Solaraktive Regionen und Flares

The solar flaring activity was at moderate level during the last 24 hours, with several C-class flares and three M-class flares. The strongest flare was GOES M4.2 flare from NOAA active region (AR) 3766 which peaked at 02:37 UTC on Jul 27. During the flare, the source region (AR 3766) of the flare had beta configuration of its photospheric magnetic field. Apart from NOAA AR 3766, NOAA AR 3762 which is the most complex region on the disk (beta-gamma-delta magnetic field configuration) has produced two M-class flares. The solar flaring activity is expected to be at moderate to high levels over the next 24 hours, possibly with few M-class flares and a low chance for isolated X-class flares.

Koronaler Massenauswurf

A halo coronal mass ejection (CME) was observed on SOHO/LASCO coronograph images starting around 05:00 UTC on Jul 27 (detected by CACTUS tool). It has a projected speed of about 560 km/s (as measured by CACTUS tool). Further analysis is ongoing to estimate the potential Earth- directed components. Type IV radio emissions were detected at 06:43 UTC on Jul 27, which is possibly associated to a CME. Further analysis will be carried out once the corresponding LASCO images are available. No other Earth-directed components of CME has been identified in the available coronograph imagery.

Sonnenwind

Solar wind parameters are transitioning from fast to slow solar wind regime. The solar wind speed ranged between 420 km/s and 550 km/s. The North-South component (Bz) ranged between -7 and 6 nT. The interplanetary magnetic field ranged between 5 nT and 8 nT. Slow solar wind conditions are expected to continue over the next 24 hours, unless the glancing blow from the coronal mass ejection that was observed lifting from the Sun on the evening of Jul 24 enhances the solar wind.

Geomagnetismus

Geomagnetic conditions were globally and locally at quiet to active conditions (NOAA Kp and K BEL 1 to 4). Quiet to unsettled conditions are expected in the next 24 hours. Active conditions are possible, if the Earth experiences glancing blow from the coronal mass ejection that was observed lifting from the Sun on the evening of Jul 24.

Protonenflusswerte

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

Elektronenflüsse im geostationären Orbit

The greater than 2 MeV electron flux, as measured by the GOES-16 satellite, was below the threshold level over the past 24 hours and is expected to remain so in the coming 24 hours. The 24h electron fluence is presently at low level, and it is expected to be at low to normal level in the next 24 hours.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 213, basierend auf 15 Stationen.

Solarindizes für den 26 Jul 2024

Wolf-Zahl Catania	262
10cm Solarflux	176
AK Chambon La Forêt	024
AK Wingst	028
Geschätzer Ap-Wert	026
Geschätzte internationale Sonnenfleckenzahl	199 - Basierend auf 29 Stationen

Zusammenfassung auffälliger Ereignisse

Zur Verfügung gestellt vom Solar Influences Data Analysis Center© - SIDC - Verarbeitet von SpaceWeatherLive

Alle Zeiten in UTC

<< Zum Tagesübersicht