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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2017 Jun 15 1231 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 Jun 2017	075	006
16 Jun 2017	075	015
17 Jun 2017	076	008

Bulletin

Catania reports two sunspot groups on the visible side of the solar disc, group 32 (NOAA AR 2662) and group 33 (not numbered by NOAA). Only reported flare in the last 24 hours was B1.9 flare which originated from the Catania sunspot group 33 (peaked at 19:07 UT on June 14). All the observed CMEs, during the last 24 hours, were narrow and will not arrive to the Earth.

The Earth is presently inside the slow solar wind with the speed of about 440 km/s, and the interplanetary magnetic field magnitude is 4 nT. Two large coronal holes, one on the north solar hemisphere and one on the south solar hemisphere, have reached central meridian yesterday evening. The associated fast solar wind is expected to arrive at the Earth early in the morning of June 18. The fast solar wind associated with the large equatorial coronal hole which has reached the central meridian in the morning of June 12, is expected to arrive at the Earth early morning of June 16. The geomagnetic conditions are presently quiet, we expect unsettled to active conditions due to arrival of the fast solar wind starting from June 16.

Today's estimated international sunspot number (ISN): 031, based on 25 stations.

Solar indices for 14 Jun 2017

Wolf number Catania	011
10cm solar flux	074
AK Chambon La Forêt	013
AK Wingst	008
Estimated Ap	008
Estimated international sunspot number	012 - Based on 37 stations

Noticeable events summary

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

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