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Daily bulletin on solar and geomagnetic activity from the SIDC

Vydáno: 2019 Oct 02 1230 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 2019	069	011
03 Oct 2019	068	010
04 Oct 2019	068	013

Bulletin

Solar activity was at very low levels. Decaying sunspot group NOAA 2749 is barely visible and was quiet during the period. No earth-directed coronal mass ejections (CMEs) have been observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal values.

Solar activity is expected to remain at very low levels.

Solar wind speed remained enhanced, varying between mostly 450 and 520 km/s, and ending the period with values near 480 km/s (ACE). Bz ranged from -4 to + 2 nT, but was near 0 nT for most of the time. The interplanetary magnetic field (phi angle) was directed away from the Sun (positive sector). Quiet to unsettled geomagnetic conditions were recorded in both Kp and K Dourbes.

Geomagnetic activity is expected to be at quiet to unsettled levels until around 4 October, when the wind stream from a patchy negative polarity coronal hole in the southern solar hemisphere may exert some influence on the earth environment. Mostly unsettled conditions are expected then.

Today's estimated international sunspot number (ISN): 007, based on 21 stations.

Solar indices for 01 Oct 2019

Wolf number Catania	///
10cm solar flux	069
AK Chambon La Forêt	013
AK Wingst	012
Estimated Ap	012
Estimated international sunspot number	011 - Based on 19 stations

Noticeable events summary

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

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