Het archief bekijken van donderdag 18 december 2014

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2014 Dec 18 1230 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

Quiet (A<20 and K<4)

Proton Flux monitor

Warning condition (activity levels expected to increase, but no numeric forecast given)

	10cm flux	Ap
18 Dec 2014	192	005
19 Dec 2014	192	007
20 Dec 2014	192	023

Bulletin

The Sun released one M flare and seven high C flares during the past 24 hours, produced by NOAA AR 2242 and 2241. The M1.4 flare was released by NOAA AR 2241 on December 17 with peak time 19:01 UT. Measured on new LASCO C3 imagery, the halo CME associated to the M8.7 flare of December 17 has an estimated velocity of 538 km/s, which yields an estimated arrival time at Earth around 15h UT on December 20. M and even X flaring from AR 2242 and AR 2241 are possible in the next 24 hours. There is a chance for proton storms in the days ahead. In the past 24 hours, solar wind speeds observed by ACE were nominal between about 340 and 440 km/s. The magnitude of the Interplanetary Magnetic Field (IMF) rose from about 5 to 7.5 nT. In the past 24 hours, geomagnetic conditions were quiet (K Dourbes between 0 and 3; NOAA Kp between 1 and 2). Quiet geomagnetic levels (K Dourbes < 4) are expected on December 18, 19 and the first half of December 20. Active (K Dourbes = 4) to minor storm conditions (K Dourbes = 5) are possible in the second half of December 20 in view of the expected CME arrival.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 122, gebaseerd op 03 stations.

Zon indexen voor 17 Dec 2014

Wolfgetal Catania	///
10cm zonneflux	192
AK Chambon La Forêt	009
AK Wingst	006
Geschatte Ap	006
Geschat internationaal zonnevlekkengetal	128 - Gebaseerd op 09 stations

Overzicht opvallende gebeurtenissen

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

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