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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2015 May 20 1230 UTC

Vorhersage des SIDC

Sonneneruptionen

Quiet conditions (<50% probability of C-class flares)

Geomagnetismus

Quiet (A<20 and K<4)

Sonnenprotonen

Quiet

	10cm Fluss	Ap
20 May 2015	105	015
21 May 2015	102	012
22 May 2015	101	007

Bulletin

Solar activity was low with 2 low level C flares. A C1.3 flare peaking at 04:04UT originated from the new region in the northern hemisphere (now numbered NOAA 2351) and a C1.6 flare peaked at 8:12UT from region 2349. All regions on disk appear fairly simple. Quiet conditions are expected with a chance for isolated low level C flares. Again a number of small eruptions were recorded: one from around 25N20W between 02:00UT and 03:00UT, and one associated to the C1.6 flare from region 2349. Although neither of those appears particularly threatening, no coronagraph data were available yet to assess possible Earth directed components. Solar wind conditions are determined by a high speed stream from a positive polarity coronal hole. Solar wind speed seems to have reached its maximum early in the reporting period with speeds at that time fluctuating around 550 km/s which have since decreased to current values around 490 km/s. The total magnetic field restored to fairly nominal values of 6nT just after the start of the reporting period and remained stable. Bz was variable in that range. Geomagnetic conditions were quiet to unsettled (both NOAA Kp and local K Dourbes 1-3). With the expected further decline of the high speed stream influence and nominal magnetic field strengths, geomagnetic conditions are expected to remain at quiet to unsettled levels.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 042, basierend auf 16 Stationen.

Solarindizes für den 19 May 2015

Wolf-Zahl Catania	///
10cm Solarflux	110
AK Chambon La Forêt	016
AK Wingst	016
Geschätzer Ap-Wert	017
Geschätzte internationale Sonnenfleckenzahl	056 - Basierend auf 22 Stationen

Zusammenfassung auffälliger Ereignisse

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

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