Viewing archive of Wednesday, 30 September 2020

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2020 Sep 30 1231 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
30 Sep 2020	072	017
01 Oct 2020	072	010
02 Oct 2020	071	007

Bulletin

The solar disk remained spotless and the solar activity was at very low levels. No significant flares have been recorded in the past 24 hours and none are expected over the next 24 hours.

No Earth-directed Coronal Mass Ejections (CMEs) were observed in the available coronagraph imagery.

The greater than 10 MeV proton flux was at nominal levels in the past 24 hours, and is expected to remain so in the next 24 hours. Over the past 24 hours the greater than 2 MeV electron flux remained above the 10^3 pfu threshold and is expected to remain elevated over the next 24 hours.

Over the past 24 hours the solar wind conditions recorded by ACE and DSCOVR remained elevated. The total interplanetary magnetic field varied between 1.6 nT and 5 nT with a weak north-south component fluctuating between -5 nT and 4 nT. In the past 24 hours the solar wind speed remained high with values ranging between 550 km/s and 640 km/s. The solar wind conditions are expected to remain enhanced over the next 24 hours as the influence of the high speed stream starts to wane by tomorrow afternoon.

The geomagnetic conditions over the past 24 hours registered two active intervals with maximum recorded NOAA Kp and K Dourbes indices equal to 4. Unsettled to active conditions are expected for the next 24 hours, while isolated periods of minor geomagnetic storms remain possible.

Today's estimated international sunspot number (ISN): 000, based on 20 stations.

Solar indices for 29 Sep 2020

Wolf number Catania	///
10cm solar flux	073
AK Chambon La Forêt	029
AK Wingst	020
Estimated Ap	020
Estimated international sunspot number	000 - Based on 28 stations

Noticeable events summary

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

All times in UTC

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