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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2015 Feb 17 1233 UTC

SIDC Forecast

Brillamenti solari

Eruptive (C-class flares expected, probability >=50%)

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

	10cm flux	Ap
17 Feb 2015	120	011
18 Feb 2015	125	007
19 Feb 2015	130	007

Bulletin

The solar activity during the past 24 hours was very low with only limited flaring activity at the B-level from NOAA active region (AR) 2282. All regions (AR) NOAA 2282, 2284 and 2285 were relatively stable or showed slight decay. Within the next 48 hours flaring activity is expected to increase to the C-level, with a few returning regions as potential source regions, like the old NOAA region 2268. No Earth-directed CMEs were observed. The interplanetary magnetic field was variable with a magnitude between 10 and 16 nT and a varying Bz component between -12 and 11 nT. The phi angle mostly was negative through the period. The solar wind speed remained mostly at 350 km/s, with more variation from 4 UT on, reaching values up to 440 km/s. Geomagnetic conditions were quiet to unsettled, with a single time slot of active conditions at the local level (K=4, Dourbes). Geomagnetic conditions are expected to remain so, until the arrival of a high speed stream (HSS) from a negative northern coronal hole estimated from the end of 20th of February.

Today's estimated international sunspot number (ISN): 025, based on 08 stations.

Solar indices for 16 Feb 2015

Wolf number Catania	///
10cm solar flux	118
AK Chambon La Forêt	018
AK Wingst	009
Estimated Ap	007
Estimated international sunspot number	031 - Based on 20 stations

Noticeable events summary

Provided by the Solar Influences Data analysis Center© - SIDC - Processed by SpaceWeatherLive

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