Het archief bekijken van maandag 18 mei 2015

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2015 May 18 1230 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

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

Proton Flux monitor

Quiet

	10cm flux	Ap
18 May 2015	114	018
19 May 2015	107	026
20 May 2015	100	010

Bulletin

Solar activity was low. A newly numbered region in the southeast (NOAA 2349) produced the only two C flares of the period (C1 peaking at 7:53UT and 8:21UT). In addition, a new region (NOAA 2350) emerged slightly to the northwest of NOAA 2349. With NOAA 2339 departing over the West limb, the regions on disk are fairly simple and unremarkable. Essentially quiet conditions are expected with a chance for isolated C flares. No earth directed CMEs have been observed. Solar wind speed was around 400 km/s. The total magnetic field saw an increase from around 5 nT to a peak of 15 nT (currently 11-12nT). The magnetic field increase is possibly associated with the compression region in front of the expected high speed stream or with the May 13 CME. Bz was initially mostly positive but is currently pronounced negative down to -12nT. Geomagnetic conditions were quiet to unsettled (NOAA Kp 1-2, local K Dourbes 1-3). A high speed stream from an equatorial positive polarity coronal hole is expected to influence solar wind over the coming days. Active geomagnetic conditions are possible in response.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 071, gebaseerd op 15 stations.

Zon indexen voor 17 May 2015

Wolfgetal Catania	///
10cm zonneflux	120
AK Chambon La Forêt	009
AK Wingst	006
Geschatte Ap	006
Geschat internationaal zonnevlekkengetal	058 - Gebaseerd op 25 stations

Overzicht opvallende gebeurtenissen

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

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