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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2016 Mar 15 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
15 Mar 2016	095	020
16 Mar 2016	095	017
17 Mar 2016	095	006

Bulletin

A single C1-flare occurred this UT morning, originating from NOAA active region 2521 (Catania 43). All regions remained relatively simple. Flaring activity at the C-level is possible (50% chance), with NOAA 2521 and 2522 as main candidates. No Earth-directed CMEs were observed.

Solar wind observations indicate a co-rotating interaction region (CIR) followed by a coronal hole (CH) high-speed stream (HSS). Near 16 UT on March 14, the solar wind speed first increased to about 550 km/s to increase further at 22h UT reaching almost 650 km/s. The Interplanetary Magnetic Field magnitude increased from about 5 nT to a maximum of 26 nT at 18h55 UT. The Bz component was variable between -21 and +20 nT. Geomagnetic conditions were at active (K=4) to minor storm (K=5) levels for several time slots from 18h UT on, both at local (Dourbes) and global (NOAA Kp) level. Unsettled to active conditions are expected for the next 24 hours.

Today's estimated international sunspot number (ISN): 050, based on 13 stations.

Solar indices for 14 Mar 2016

Wolf number Catania	081
10cm solar flux	093
AK Chambon La Forêt	027
AK Wingst	015
Estimated Ap	013
Estimated international sunspot number	058 - Based on 33 stations

Noticeable events summary

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

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