Viewing archive of Tuesday, 31 May 2022

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2022 May 31 1232 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
31 May 2022	101	007
01 Jun 2022	098	007
02 Jun 2022	096	007

Bulletin

Over the past 24 hours, solar flaring activity has been very low, no C-class flares observed. There are three active regions on the disc, two of magnetic type alpha and one beta. For the next 24 hours, C-class flares are possible.

No Earth directed CMEs were detected in the past 24 hours.

The greater than 10 MeV proton flux was at nominal levels and is expected to remain so in the next 24 hours.

The greater than 2MeV electron has been fluctuating around the 1000 pfu threshold over the past 24 hours. It can be expected to remain elevated in the next 24 hours. The 24h electron fluence is changing at moderate levels, is expected to be at moderate levels in the next 24 hours.

Over the past 24 hours, the solar wind conditions reflect the continuing effects of the high speed stream. The magnetic field values were around 5nT, while Bz had no long periods below -5 nT. The solar wind speed was measured (DSCOVR) decreased to around 515 km/s. The interplanetary magnetic field phi angle was on the negative sector (towards the Sun). Over the next 24 hours, we are expecting those effects from high speed stream to slowly fade.

Over the past 24 hours, geomagnetic conditions were quiet to unsettled (Kp=K Dourbes=3). Over the next 24 hours, quiet to unsettled conditions are expected.

Today's estimated international sunspot number (ISN): 070, based on 23 stations.

Solar indices for 30 May 2022

Wolf number Catania	078
10cm solar flux	101
AK Chambon La Forêt	014
AK Wingst	010
Estimated Ap	010
Estimated international sunspot number	056 - Based on 29 stations

Noticeable events summary

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

All times in UTC

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