Viewing archive of Friday, 28 October 2022

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2022 Oct 28 1232 UTC

SIDC Forecast

Solar flares

C-class flares expected, (probability >=50%)

Geomagnetism

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

Solar protons

Quiet

	10cm flux	Ap
28 Oct 2022	130	006
29 Oct 2022	128	014
30 Oct 2022	125	008

Bulletin

Solar flaring activity was at low levels and infrequent, with two C1 flares detected over the last 24 hours. NOAA Active Regions (AR) 3126 (Catania group 68, magnetic type Alpha) and 3130 (Catania group 72, magnetic type Beta) produced the C-class activity. However, NOAA AR 3126 is currently turning away from Earth's view today and NOAA AR 3130 shows signs of decay today. NOAA AR 3131 (Catania group 73, magnetic type Beta) has also started to decay in the last 24 hours. An unnumbered AR that has been active while behind the solar limb is now turning to Earth's view. Its magnetic configuration cannot be assessed yet, nevertheless, it appears to be capable of producing C- and M-class flares.

No Earth-directed Coronal Mass Ejections were observed in the last 24 hours.

The greater than 10 MeV proton flux was at nominal levels over the past 24 hours and is expected to remain so for the next 24 hours. The greater than 2 MeV electron flux remained below the 1000 pfu alert threshold and is expected to remain below this threshold during the next 24 hours. The 24h electron fluence was at nominal levels and is expected to remain so.

The Solar Wind (SW) conditions were typical of slow wind regime during the last 24 hours. The SW speed fluctuated between 350 to 480 km/s, while the total magnetic field (Bt) varied between 1 and 10 nT, and its North-South (Bz) component ranged between -7 and 6 nT in the last 24 hours. The interplanetary magnetic field phi angle was most of the time directed away from the Sun over the last 24 hours. An High Speed Stream (HSS) is expected to arrive tomorrow and cause a significant effect to the SW conditions.

Geomagnetic conditions were quiet both globally and locally (NOAA Kp and K Belgium 2-3) over the last 24 hours. The are expected to increase to active conditions in the next 24 hours, since an HSS is likely to arrive some time tomorrow.

Today's estimated international sunspot number (ISN): 083, based on 14 stations.

Solar indices for 27 Oct 2022

Wolf number Catania	099
10cm solar flux	130
AK Chambon La Forêt	018
AK Wingst	011
Estimated Ap	010
Estimated international sunspot number	080 - Based on 23 stations

Noticeable events summary

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

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