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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2017 Mar 03 1247 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
03 Mar 2017	079	020
04 Mar 2017	077	011
05 Mar 2017	076	009

Bulletin

Solar activity is very low and only one B-class flare was reported in the past 24 hours. We expect that solar activity will remain low with only isolated B-class flares possible in the coming hours. No Earth directed Coronal Mass Ejections have been observed and the solar protons remained at background level in the past 24 hours.

The Earth is still inside the fast solar wind associated with the large coronal hole which reached central meridian on February 25. The solar wind speed is presently 720 km/s and the interplanetary magnetic field magnitude is about 5 nT. Due to the fast solar wind and the intervals of negative value of the Bz component of the interplanetary magnetic field (about 710 km/s and -5 nT, respectively) strongly disturbed geomagnetic conditions were reported around midnight of March 02 (Dourbes reported K=5 and NOAA Kp=4) and today at about 09 UT (NOAA reported Kp=5 and Dourbes K=4). The geomagnetic conditions are presently unsettled to active and we expect them to stay so in the coming hours. Due to the still rather fast solar wind, longer intervals of the negative value of the Bz component might cause the occasional intervals with the K index going up to 5.

Today's estimated international sunspot number (ISN): 050, based on 11 stations.

Solar indices for 02 Mar 2017

Wolf number Catania	052
10cm solar flux	079
AK Chambon La Forêt	043
AK Wingst	036
Estimated Ap	038
Estimated international sunspot number	054 - Based on 26 stations

Noticeable events summary

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

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