Viewing archive of Tuesday, 1 October 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Oct 01 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

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

Solar protons

Quiet

	10cm flux	Ap
01 Oct 2019	068	015
02 Oct 2019	068	011
03 Oct 2019	067	008

Bulletin

Solar activity was at very low levels. A small and as yet unnumbered sunspot region developed near S09E75, producing a B1 flare at 01:45UT (GOES) and ending a 27 days stretch of spotless days (SILSO). 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 undulated between mostly 400 and 510 km/s, ending the period with values near 480 km/s (ACE). Bz ranged from -6 to + 5 nT, with negative stretches during the 12-15UT and 00-06UT intervals. Quiet to active geomagnetic conditions were recorded in both Kp and K Dourbes. The interplanetary magnetic field (phi angle) was mostly directed away from the Sun (positive sector).

Geomagnetic activity is expected to be at quiet to unsettled levels, with a decreasing chance on another active episode.

Today's estimated international sunspot number (ISN): 011, based on 14 stations.

Solar indices for 30 Sep 2019

Wolf number Catania	///
10cm solar flux	068
AK Chambon La Forêt	022
AK Wingst	013
Estimated Ap	015
Estimated international sunspot number	/// - Based on /// stations

Noticeable events summary

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

All times in UTC

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