Viewing archive of Saturday, 11 March 2017

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2017 Mar 11 1231 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
11 Mar 2017	071	005
12 Mar 2017	071	005
13 Mar 2017	071	005

Bulletin

Solar activity was very low. The Sun was spotless. No earth- directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10MeV proton flux was at nominal levels.

Quiet flaring conditions are expected to continue.

Solar wind speed declined from its initial 480 km/s to nominal levels near 380 km/s by 03UT. It then gradually rebounded to values near 420 km/s by 08UT, ending the period near 380 km/s. Bz fluctuated between -3 nT and +2 nT, being steady at +1 nT from 08UT onwards. The direction of the interplanetary magnetic field (phi angle) was variable. A narrow extension from the positive northern polar coronal hole (CH) has transited the central meridian (CM).

The geomagnetic field was at quiet to unsettled levels. Mostly quiet to unsettled conditions are expected, until the arrival of the particle stream from the polar CH extension expected for 13-14 March, which may result in active episodes.

Today's estimated international sunspot number (ISN): 000, based on 24 stations.

Solar indices for 10 Mar 2017

Wolf number Catania	000
10cm solar flux	071
AK Chambon La Forêt	011
AK Wingst	010
Estimated Ap	016
Estimated international sunspot number	000 - Based on 28 stations

Noticeable events summary

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

All times in UTC

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