Viewing archive of Tuesday, 7 January 2014

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2014 Jan 07 1240 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

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

Solar protons

Proton event in progress (>10 MeV)

	10cm flux	Ap
07 Jan 2014	210	008
08 Jan 2014	210	017
09 Jan 2014	210	007

Bulletin

Six C flares and two M flares were erupted on the solar front disk during the past 24 hours. An impulsive M7.2 flare erupted on January 7 at 10:13 UTC. SDO/AIA imagery revealed NOAA AR 1944 as the source region. An M1.0 flare erupted from NOAA AR 1946 peaking at 3:53 UTC. Due to a data gap in SOHO/LASCO coronagraphic data, it is not clear yet whether these events were associated with a CME. STEREO A and B data also reveal flaring activity on the backside of the solar disk. Flaring originated from old region NOAA AR 1936 on January 6 at 22:35 UTC. STEREO coronagraphic data observed a CME (first measurement on January 7 at 4:25 UTC in STEREO B), which is propagating to the South. The CME is probably related to the backsided event, but confirmation will be needed when more coronagraphic data are available. The likelihood for C and M flares remains high; resp 90% and 50%. There is a chance of 20% for an X-flare. Flaring activity is mainly expected from NOAA ARs 1944, 1946 and 1942. In case of a CME associated with these recent frontsided flares, it has the potential to be geo-effective. The proton flux is still above the threshold for the > 10 MeV protons, but is starting to decline. We are currently in a slow solar wind (speed is 350 km/s). The magnitude of the interplanetary magnetic field was maximally 4 nT, with a mainly negative Bz-component. Current geomagnetic conditions are quiet (estimated NOAA Kp and local K=0 to 2). Quiet conditions are expected to continue until the possible arrival of a glancing blow from the CMEs of January 4 and January 6. Unsettled to active (K=3 to 4) conditions might be reached on January 8.

Today's estimated international sunspot number (ISN): 106, based on 11 stations.

Solar indices for 06 Jan 2014

Wolf number Catania	///
10cm solar flux	204
AK Chambon La Forêt	007
AK Wingst	003
Estimated Ap	002
Estimated international sunspot number	123 - Based on 17 stations

Noticeable events summary

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

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