Viewing archive of Thursday, 24 January 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Jan 24 1231 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

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

Solar protons

Quiet

	10cm flux	Ap
24 Jan 2019	073	016
25 Jan 2019	073	008
26 Jan 2019	072	006

Bulletin

There is presently only one sunspot group observed on the visible side of the Sun. NOAA AR 2733 still has beta configuration of its photospheric magnetic field and is occasionally producing low B-class flares. We expect low solar flaring activity to persist in the coming hours, with the low probability for an isolated C-class flare. There were no Earth directed CMEs reported during last 24 hours and the solar protons remained at the background level.

The Earth is presently inside the fast solar wind (originating from the equatorial coronal hole which reached central meridian in the morning of January 19) with the speed of about 600 km/s and the interplanetary magnetic field magnitude of 8 nT. Several intervals of longer negative value of the Bz component of the interplanetary magnetic field and the fast solar wind induced disturbed geomagnetic conditions. Around the midnight and early morning of January 24 local station at Dourbes and NOAA reported K=4 and Kp=4, respectively. As the solar wind speed is rather high, although the interplanetary magnetic field magnitude already significantly decreased, we still might expect unsettled to active geomagnetic conditions in the coming hours.

Today's estimated international sunspot number (ISN): 022, based on 09 stations.

Solar indices for 23 Jan 2019

Wolf number Catania	///
10cm solar flux	072
AK Chambon La Forêt	025
AK Wingst	017
Estimated Ap	016
Estimated international sunspot number	020 - Based on 20 stations

Noticeable events summary

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

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