Viewing archive of Friday, 28 April 2017

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2017 Apr 28 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
28 Apr 2017	079	008
29 Apr 2017	078	008
30 Apr 2017	078	008

Bulletin

The solar activity is extremely low without even B-class flares reported in the last 24 hours. We expect the low level of activity to continue in the coming hours, however B-class flares are still possible. The CME first clearly seen in the SOHO LASCO C2 field of view at about 07:36 UT on April 28 (after a long data gap) seem to be rather narrow with the bulk of the CME mass directed northward of the Sun-Earth line. From the currently available observations it does not seem very probable that this CME will arrive at the Earth. More will be reported when data become available. No Earth directed CMEs have been observed in the past 24 hours. The Earth is presently inside the slow solar wind with the speed of 400 km/s, and the interplanetary magnetic field magnitude amounts about 5 nT. The geomagnetic conditions are presently quiet and we expect them to stay so in the coming hours.

Today's estimated international sunspot number (ISN): 036, based on 16 stations.

Solar indices for 27 Apr 2017

Wolf number Catania	///
10cm solar flux	078
AK Chambon La Forêt	009
AK Wingst	008
Estimated Ap	008
Estimated international sunspot number	027 - Based on 28 stations

Noticeable events summary

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

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