Het archief bekijken van woensdag 20 mei 2015

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2015 May 20 1230 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

Quiet (A<20 and K<4)

Proton Flux monitor

Quiet

	10cm flux	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.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 042, gebaseerd op 16 stations.

Zon indexen voor 19 May 2015

Wolfgetal Catania	///
10cm zonneflux	110
AK Chambon La Forêt	016
AK Wingst	016
Geschatte Ap	017
Geschat internationaal zonnevlekkengetal	056 - Gebaseerd op 22 stations

Overzicht opvallende gebeurtenissen

Aangeboden door het Solar Influences Data Analysis Center© - SIDC - Verwerkt door SpaceWeatherLive

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