Viewing archive of Monday, 26 February 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Feb 26 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
26 Feb 2018	069	008
27 Feb 2018	070	011
28 Feb 2018	071	006

Bulletin

There are presently no numbered sunspot regions on the visible side of the solar disk. Accordingly, solar activity is extremely low (last B-class flare was reported about a week ago). We expect such a low activity to persist in the coming days. Coronagraph images do not show signatures of the Earth directed CMEs, and the solar protons remained at the background level.

The solar wind speed is presently about 430 km/s and the interplanetary magnetic field magnitude is 5 nT. In the coming hours we might expect some increase of the solar wind speed, associated with the equatorial coronal hole (possibly connected to the southern polar coronal hole) which reached central meridian in the late evening of February 22. Rather small and patchy equatorial coronal hole reached central meridian this morning. The associated increase of the solar wind speed might be expected in the morning of March 02. The geomagnetic conditions are presently quiet and we expect quiet to unsettled geomagnetic conditions in the coming hours.

Today's estimated international sunspot number (ISN): 016, based on 19 stations.

Solar indices for 25 Feb 2018

Wolf number Catania	///
10cm solar flux	067
AK Chambon La Forêt	011
AK Wingst	006
Estimated Ap	005
Estimated international sunspot number	000 - Based on 26 stations

Noticeable events summary

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

All times in UTC

<< Go to daily overview page