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Daily bulletin on solar and geomagnetic activity from the SIDC

Vydáno: 2019 Oct 28 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
28 Oct 2019	070	012
29 Oct 2019	071	010
30 Oct 2019	072	014

Bulletin

No active regions visible on the disk. Solar activity has been very low, no flares in the past 24 h. A small bright region is rotating into view (not classified as active region yet), there are slight chances that this will increase solar activity. The situation is not expected to change otherwise.

No Earth directed CMEs in past 24 h. Solar protons have remained at background levels over the past 24 hours.

The solar wind speed is at 490 km/s with interplanetary magnetic field magnitude of 4 nT. Geomagnetic conditions were dominated by a high speed stream from a coronal hole, reaching K = 5 locally at Dourbes (from 20:00 UT to 22:00 UT on October 27) and Kp = 3. The Earth is now leaving the influence of this coronal hole related solar wind. Quiet to unsettled conditions are expected for the next 24 h. Late on October 29 or on October 30, the arrival of the CME from October 25 and a high speed stream from a negative polarity coronal hole may cause an increase in geomagnetic conditions (most likely not greater than K = 4).

Today's estimated international sunspot number (ISN): 000, based on 21 stations.

Solar indices for 27 Oct 2019

Wolf number Catania	///
10cm solar flux	069
AK Chambon La Forêt	021
AK Wingst	020
Estimated Ap	021
Estimated international sunspot number	000 - Based on 25 stations

Noticeable events summary

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

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