Viewing archive of Sunday, 12 March 2017

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2017 Mar 12 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
12 Mar 2017	070	009
13 Mar 2017	070	009
14 Mar 2017	071	015

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 increased slightly from 380 km/s to 420 km/s at midnight, and has been steady since. Somewhat enhanced density (10/cm3) and negative Bz (up to -6 nT) were observed around midnight. Bz fluctuated between -6 nT and +2 nT, being mostly negative. The interplanetary magnetic field was mostly directed towards the Sun, with a brief positive interval (away) during the 21-24UT interval.

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

Today's estimated international sunspot number (ISN): 000, based on 20 stations.

Solar indices for 11 Mar 2017

Wolf number Catania	///
10cm solar flux	070
AK Chambon La Forêt	017
AK Wingst	009
Estimated Ap	009
Estimated international sunspot number	000 - Based on 33 stations

Noticeable events summary

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

All times in UTC

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