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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2021 Jun 02 1233 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

	10cm flux	Ap
02 Jun 2021	076	006
03 Jun 2021	077	013
04 Jun 2021	077	007

Bulletin

The solar activity was quiet over the past 24 hours, with the GOES X-ray flux remaining below C-level. The bipolar sunspot group (Catania sunspot group 1, NOAA 2827) has decayed and a new sunspot region (not numbered) has rotated over the East limb in the South hemisphere. The solar activity is expected to remain mostly quiet.

No Earth directed Coronal Mass Ejection (CME) has been detected in the available coronagraph imagery.

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 was below the 1000 pfu threshold in the past 24 hours and is expected to remain so during the next 24 hours. The 24h electron fluence was at normal levels in the last 24 hours and is expected to stay at normal levels for the next 24 hours.

The solar wind parameters (as observed by ACE and DSCOVR) showed an ambient background and slow solar wind speed regime. The solar wind speed ranged between 280 km/s to 300 km/s. The interplanetary magnetic field magnitude was below 3.5 nT, and Bz components varied between -3.0 nT and 2.2 nT. The high-speed stream associated with the equatorial coronal hole (that reached the central meridian on May 31) is expected to enhance the solar wind condition later today or tomorrow.

The geomagnetic conditions were quiet over the past 24 hours. The conditions may become more active with the arrival of the high-speed streams from the equatorial coronal hole (that reached the central meridian on May 31) later today or tomorrow.

Today's estimated international sunspot number (ISN): 028, based on 19 stations.

Solar indices for 01 Jun 2021

Wolf number Catania	021
10cm solar flux	075
AK Chambon La Forêt	003
AK Wingst	001
Estimated Ap	001
Estimated international sunspot number	019 - Based on 29 stations

Noticeable events summary

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

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