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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2018 Apr 16 1231 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
16 Apr 2018	070	007
17 Apr 2018	070	006
18 Apr 2018	071	007

Bulletin

Solar activity is low and only several B-class flares were reported during last 24 hours. We do not expect change in the level of flaring activity in the coming hours. Coronagraph images do not show signatures of the Earth directed CMEs, and the solar protons remained at the background level.

The Earth is presently inside the slow solar wind with the speed of about 300 km/s and the interplanetary magnetic field magnitude is 4 nT. Equatorial coronal hole with the extend to the southern solar hemisphere (up to about 45 degrees south), reached central meridian yesterday morning. The associated increase of the solar wind speed might be expected in the mid day of April 19 (as modeled by EUHFORIA and ENLIL). The geomagnetic conditions are presently quiet and we expect them to stay so in the coming hours.

Today's estimated international sunspot number (ISN): 012, based on 16 stations.

Solar indices for 15 Apr 2018

Wolf number Catania	///
10cm solar flux	071
AK Chambon La Forêt	///
AK Wingst	007
Estimated Ap	006
Estimated international sunspot number	007 - Based on 20 stations

Noticeable events summary

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

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