Viewing archive of Friday, 4 January 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Jan 04 1258 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Minor storm expected (A>=30 or K=5)

Solar protons

Quiet

	10cm flux	Ap
04 Jan 2019	073	009
05 Jan 2019	074	018
06 Jan 2019	073	007

Bulletin

Solar activity remained low. NOAA active region 2732 produced one B1.9 flare peaking at 17:14 UT yesterday (January 3). No geoeffective coronal mass ejections (CMEs) were observed over the last 24 hours. The greater than 10 MeV proton flux was at nominal values. Solar activity is expected to remain at low levels with some probabailty for C-class flares. Solar wind speed abruptly increased from about 300 till 350 km/s this morning, January 4 (DSCOVR). Simultanioulsy interplanetary magnetic field amplitute increased till 9 nT, while Bz started to vary between -7 nT and +7 nT. The geomagnetic conditions were quiet. However, unsettled to active geomagnetic conditions can be expected later today (4 January) due to the increasing influence of the wind stream associated with the negative polarity equatorial coronal hole. An isolated minor storm can be expected tomorrow (Januray 5).

Today's estimated international sunspot number (ISN): 014, based on 13 stations.

Solar indices for 03 Jan 2019

Wolf number Catania	///
10cm solar flux	073
AK Chambon La Forêt	005
AK Wingst	001
Estimated Ap	001
Estimated international sunspot number	018 - Based on 19 stations

Noticeable events summary

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

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