Viewing archive of Sunday, 21 June 2026

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2026 Jun 21 1231 UTC

SIDC Forecast

Solar flares

M-class flares expected (probability >=50%)

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
21 Jun 2026	113	007
22 Jun 2026	115	007
23 Jun 2026	117	007

Solar Active Regions and flaring

A total of 5 numbered sunspot groups were identified on the disk over the past 24 hours. We observed two M-class flares in the last 24 hours, both originating from SIDC Sunspot Group 885 (NOAA Active Region 4473), currently located at S09E68 with a Beta magnetic configuration. This sunspot group belongs to a complex group of recurring regions which are increasing solar activity as they rotate into view. The largest flare was a M2.6 flare (SIDC Flare 7982) peaking on June 21 at 02:46 UTC, which was produced by SIDC Sunspot Group 885 (NOAA Active Regions 4457, 4473). Solar flaring activity is expected to be moderate over the next 24 hours, with M-class flares likely and a small chance for X-class flares.

Coronal mass ejections

The M2.6 flare (SIDC Flare 7982) from SIDC Sunspot group 885 (NOAA AR 4473) was associated with a faint west-directed, wide CME. Since this region is very close to the west limb, an Earth arrival of this CME is not expected.

Solar wind

The Earth is currently inside a slow solar wind regime, with solar wind speed around 370 km/s and an interplanetary magnetic field of 6nT. Similar conditions can be expected for the next 24 hours.

Geomagnetism

Geomagnetic conditions were quiet at planetary and unsettled at local levels (Kp up to 2, K_Dourbes up to 3). Similar quiet to unsettled conditions can be expected for the next 24 hours.

Proton flux levels

The greater than 10 MeV proton flux, as measured by GOES-18, was below the 10 pfu threshold level over the past 24 hours and is expected to remain so for the next 24 hours.

Electron fluxes at geostationary orbit

The greater than 2 MeV electron flux, as measured by GOES-18 and GOES-19 was below the 1000 pfu alert threshold in the past 24 hours. The flux is expected to remain low over the next 24 hours. The 24-hour electron fluence was at normal levels over the past 24 hours and is expected to remain at these levels over the next 24 hours.

Today's estimated international sunspot number (ISN): 070, based on 25 stations.

Solar indices for 20 Jun 2026

Wolf number Catania	///
10cm solar flux	113
AK Chambon La Forêt	012
AK Wingst	011
Estimated Ap	010
Estimated international sunspot number	091 - Based on 23 stations

Noticeable events summary

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

All times in UTC

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