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Daily bulletin on solar and geomagnetic activity from the SIDC

Vydáno: 2016 Oct 02 1231 UTC

SIDC Forecast

Sluneční erupce

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

Geomagnetism

Quiet (A<20 and K<4)

Sluneční protony

Quiet

	10cm flux	Ap
02 Oct 2016	079	018
03 Oct 2016	078	010
04 Oct 2016	076	010

Bulletin

There are presently no active regions on the visible side of the Sun, and accordingly solar activity is low (without C-class flares reported). We expect low solar activity to persist in the coming hours. The CME, first seen in the SOHO/LASCO C2 field of view at about 14:24 UT on October 1, was associated with the EUV wave and coronal dimming. The bulk of the CME mass was in the north-east direction, and the CME had angular width of about 90 degrees and projected speed of 400 km/s (as reported by the CACTus software package). This CME will not arrive at the Earth.

The solar wind speed is slowly decreasing and it is presently about 500 km/s. The interplanetary magnetic field magnitude is stable having value of about 5 nT. Due to the long interval of the negative value of the Bz component of the interplanetary magnetic field and the fast solar wind, active geomagnetic conditions were reported (around 23:40 UT) on October 1. The local station at Dourbes reported K=4, and NOAA reported Kp=4. We expect quiet to unsettled geomagnetic conditions in the coming hours.

Today's estimated international sunspot number (ISN): 008, based on 17 stations.

Solar indices for 01 Oct 2016

Wolf number Catania	///
10cm solar flux	081
AK Chambon La Forêt	037
AK Wingst	023
Estimated Ap	025
Estimated international sunspot number	000 - Based on 23 stations

Noticeable events summary

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

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