Viewing archive of Saturday, 1 July 2017

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2017 Jul 01 1230 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
01 Jul 2017	072	009
02 Jul 2017	071	008
03 Jul 2017	070	023

Bulletin

Solar activity was at very low levels during the period. NOAA 2664 was quiet. No earth-directed CMEs were observed in available coronagraphic imagery. The greater than 10MeV proton flux was at nominal levels.

Quiet flaring conditions are expected.

Solar wind parameters were at nominal values until around 18:00UT, when a gradual intensification set in. Bz had a negative stretch around -6 nT from 02:30UT till 05:30UT, then oscillated between -9 and +8 nT (DSCOVR). Wind speed was steady around 340 km/s till 08UT, before gradually increasing to values near 400 km/s. The interplanetary magnetic field was mostly directed away from the Sun. The first of two small negative equatorial coronal holes (CH) has transited the central meridian.

The geomagnetic field was at quiet to unsettled levels, and is expected to remain so. A glancing blow from the 28 June CME is possible late on 2 or on 3 July, likely followed by the particle stream from the small negative CH. This may result in active geomagnetic conditions, with a chance on a minor storming episode.

Today's estimated international sunspot number (ISN): 019, based on 14 stations.

Solar indices for 30 Jun 2017

Wolf number Catania	011
10cm solar flux	072
AK Chambon La Forêt	011
AK Wingst	005
Estimated Ap	004
Estimated international sunspot number	/// - Based on /// stations

Noticeable events summary

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

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