Viewing archive of Monday, 26 June 2017

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2017 Jun 26 1231 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Active conditions expected (A>=20 or K=4)

Solar protons

Quiet

	10cm flux	Ap
26 Jun 2017	074	010
27 Jun 2017	075	013
28 Jun 2017	075	008

Bulletin

Solar activity was at very low levels during the period. NOAA 2664 is currently the only sunspot region on the solar disk. It is slowly developing and produced a B1 flare on 26 June at 07:28UT. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10MeV proton flux was at nominal levels.

Quiet flaring conditions are expected, with a small chance on a C-class flare.

Earth was under the influence of a moderate speed coronal hole wind stream. Solar wind speed continued its gradual increase with current values around 560 km/s (DSCOVR). Bz fluctuated between -7 and +6 nT. The interplanetary magnetic field was mostly directed away from the Sun. A small positive equatorial coronal hole was at the central meridian on 25 June.

The geomagnetic field was at quiet to unsettled levels, and is expected to remain so, but with a chance on an active episode.

Today's estimated international sunspot number (ISN): 024, based on 20 stations.

Solar indices for 25 Jun 2017

Wolf number Catania	///
10cm solar flux	074
AK Chambon La Forêt	019
AK Wingst	013
Estimated Ap	013
Estimated international sunspot number	019 - Based on 27 stations

Noticeable events summary

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

All times in UTC

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