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Daily bulletin on solar and geomagnetic activity from the SIDC

Vydáno: 2018 Oct 08 1230 UTC

SIDC Forecast

Sluneční erupce

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

Geomagnetism

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

Sluneční protony

Quiet

	10cm flux	Ap
08 Oct 2018	068	023
09 Oct 2018	067	007
10 Oct 2018	067	007

Bulletin

There are no active regions visible on the solar disk. No C-class flares in past 24 h. Solar activity is expected to remain at very low levels.

No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar protons have remained at background levels over the past 24 hours.

The solar wind speed is at 530 km/s with interplanetary magnetic field intensity of 7 nT. Geomagnetic conditions have reached minor storm levels, due to the arrival of the high speed solar wind from a positive polarity coronal hole. Solar wind speed reached 600 km/s with interplanetary magnetic field intensities close to 20 nT, Bz went down to -15 nT. These solar wind conditions caused active and minor storm periods (K = 4 and 5, both at local and at planetary levels) starting around 12:00 UT on October 7 and still ongoing, as the Earth is inside the fast solar wind stream at present. Geomagnetic conditions will gradually return to quiet levels in the coming hours, but active geomagnetic conditions can still occur today and tomorrow.

Today's estimated international sunspot number (ISN): 000, based on 23 stations.

Solar indices for 07 Oct 2018

Wolf number Catania	///
10cm solar flux	068
AK Chambon La Forêt	043
AK Wingst	027
Estimated Ap	027
Estimated international sunspot number	000 - Based on 27 stations

Noticeable events summary

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

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