Viewing archive of Monday, 31 October 2022

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2022 Oct 31 1233 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
31 Oct 2022	133	009
01 Nov 2022	135	015
02 Nov 2022	135	011

Bulletin

The solar flaring activity over the past 24 hours was at low levels with isolated low C-class flaring. There are four numbered active regions on the visible solar disk all classified as magnetic type beta. NOAA 3135 underwent some development and is currently the largest active region, but has remained quiet. NOAA 3130 has rotated almost fully behind the west limb producing a C1.3-class flare. NOAA 3131 remained stable and NOAA 3133 remained small producing a C1.1-class flare. The flaring activity is expected to be at very low to low levels over the next 24 hours with isolated C-class flaring.

No Earth-directed coronal mass ejections (CMEs) were detected in the available coronagraph imagery over the past 24 hours.

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. The greater than 2 MeV electron flux has been primarily above the1000 pfu threshold over the past 24 hours and is expected to remain so over the next 24 hours. The 24h electron fluence has reached moderate levels and is expected to remain so over the next 24 hours.

Over the past 24 hours the solar wind parameters (ACE and DSCOVR) continued to be under the influence of the high speed stream (HSS) from a positive polarity coronal hole. The solar wind velocity has followed a declining trend, ranging from 570 to 436 km/s. The interplanetary magnetic field was weak with a maximum value of 5.6 nT and a minimum Bz of -4.8 nT. The magnetic field was predominantly in the positive sector (directed away from the Sun). The solar wind parameters are expected to remain enhanced over the next 24 hours under the waning influence of the HSS from the currently geo-effective positive polarity coronal hole and an expected new HSS arrival later tomorrow.

The geomagnetic conditions over the past 24 hours were quiet to unsettled. Quiet to active geomagnetic conditions are expected over the next 24 hours in response to the ongoing HSS with possible isolated active periods and a chance for reaching a minor storm level later on Nov 1st.

Today's estimated international sunspot number (ISN): 057, based on 13 stations.

Solar indices for 30 Oct 2022

Wolf number Catania	///
10cm solar flux	131
AK Chambon La Forêt	024
AK Wingst	014
Estimated Ap	014
Estimated international sunspot number	074 - Based on 20 stations

Noticeable events summary

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

All times in UTC

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