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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2017 Mar 04 1230 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

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

Protoni solari

Quiet

	10cm flux	Ap
04 Mar 2017	075	015
05 Mar 2017	074	013
06 Mar 2017	074	011

Bulletin

Solar activity was very low during the period, with no C-class flares or higher reported. The remnants of sunspot group NOAA2641 are barely visible. NOAA2638 rotated over the west limb. 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.

Earth was still under the influence of the high speed stream (HSS) from the negative trans-equatorial coronal hole (CH). Solar wind speed varied between 720 and 620 km/s, ending the period with values around 690 km/s. Bz mostly fluctuated between -5 nT and +6 nT. The interplanetary magnetic field was directed towards the Sun. A small positive equatorial coronal hole (CH) is near the central meridian, but the effect on the geo- environment is expected to be limited.

The geomagnetic field was at quiet to active levels, with Kp at minor storming during the 00-03UT and 03-06UT intervals. Quiet to active levels are expected, with a chance on another minor storming interval.

Today's estimated international sunspot number (ISN): 000, based on 11 stations.

Solar indices for 03 Mar 2017

Wolf number Catania	068
10cm solar flux	078
AK Chambon La Forêt	028
AK Wingst	017
Estimated Ap	018
Estimated international sunspot number	040 - Based on 16 stations

Noticeable events summary

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

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