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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2016 Mar 18 1230 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

	10cm flux	Ap
18 Mar 2016	090	007
19 Mar 2016	095	006
20 Mar 2016	100	005

Bulletin

Flaring activity at the frontside of the solar disk was very low, without any C-class flares. NOAA active region 2524 (Catania 49) turned into a beta region, while NOAA 2519 (Catania 44) remained stable. All other regions decayed or even turned into plage. A filament eruption occurred around UT midnight near S10W30, but no clear related CME was observed in coronagraphic data. There is a probability of 25% for C-class flares.

The solar wind conditions indicated the continuation of the high speed stream influence. Solar wind speed has gradually decreased from 550-600 km/s to current values near 450 km/s. The magnetic field magnitude remained near 5-7 nT, with a fluctuating north-south component. A coronal hole in the northern hemisphere has crossed the central meridian, which is expected to cause a high speed stream near Earth within 2 to 3 days. Geomagnetic conditions were mainly quiet (K=0-2) to unsettled (K=3), which is expected to remain so for the next 24 to 48 hours. Though, an isolated period of active conditions (K=4) is possible.

Today's estimated international sunspot number (ISN): 040, based on 13 stations.

Solar indices for 17 Mar 2016

Wolf number Catania	077
10cm solar flux	092
AK Chambon La Forêt	021
AK Wingst	024
Estimated Ap	026
Estimated international sunspot number	059 - Based on 30 stations

Noticeable events summary

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

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