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Daily bulletin on solar and geomagnetic activity from the SIDC

Vydáno: 2014 Jan 05 1227 UTC

SIDC Forecast

Sluneční erupce

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

Geomagnetism

Quiet (A<20 and K<4)

Sluneční protony

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

	10cm flux	Ap
05 Jan 2014	240	005
06 Jan 2014	250	006
07 Jan 2014	250	007

Bulletin

Two C flares and two M flares were measured by GOES during the past 24 hours. A long duration M4.0 flare occurred in the western part of NOAA AR 11944 on January 4 with peak time at 19:46 UT. An associated CME is mainly propagating southward, but more properties are difficult to determine due to a data gap in STEREO and LASCO imagery. NOAA AR 11944 continued to grow in size and number of sunspots. It currently has a beta- gamma-delta magnetic configuration of its photospheric field. A long duration M2.0 flare erupted on January 4 with peak time at 22:52 UT. The source region for this event is NOAA AR 11936, currently located at the west limb. A related CME was observed in LASCO/C2 and STEREO B coronagraphic imagery (first measurement in LASCO/C2 at 23:12 UT). Based on the current observations, the CME is mainly propagating in the northwest direction with an estimated projected speed of 520 km/s. A glancing blow might arrive at Earth on January 8 around 0:00 UT. The >10 MeV proton flux was enhanced during the past 12 hours, but remained below the threshold level. The flaring chances for the next 48 hours are high: 90% for C flares, 70% for M flares. There is also some chance for an X flare (20%). We maintain the warning condition for proton events. Current solar wind speed measured by ACE is around 450 km/s. The magnitude of the interplanetary magnetic field remains around 4 to 6 nT. Current geomagnetic conditions are quiet (K=0 to 2) to unsettled (K=3) (estimated NOAA Kp 1 to 2 and K_Izmiran 1 to 3). Mainly quiet to unsettled conditions are expected to continue for the next 48 hours.

Today's estimated international sunspot number (ISN): 093, based on 13 stations.

Solar indices for 04 Jan 2014

Wolf number Catania	///
10cm solar flux	215
AK Chambon La Forêt	008
AK Wingst	006
Estimated Ap	005
Estimated international sunspot number	092 - Based on 08 stations

Noticeable events summary

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

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