Viewing archive of Monday, 15 June 2026

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2026 Jun 15 1231 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
15 Jun 2026	118	007
16 Jun 2026	118	013
17 Jun 2026	118	013

Solar Active Regions and flaring

A total of 4 numbered sunspot groups were identified on the disk over the past 24 hours. Flaring activity is low, with only minor C-class flares occurring. The largest flare was a C1.2 flare (SIDC Flare 7940) peaking on June 14 at 13:02 UTC, which was produced by SIDC Sunspot Group 891 (NOAA Active Region 4464). Solar flaring activity is expected to be low over the next 24 hours, with C-class flares likely.

Coronal mass ejections

No Earth-directed CMEs were observed in the last 24 hours.

Coronal holes

SIDC Coronal Hole 168 (small equatorial coronal hole with a positive polarity) first reached the central meridian on June 13, we may observe its associated fast solar wind stream in 24 to 48 hours.

Solar wind

The Earth is inside slow solar wind, with speeds around 430 km/s and interplanetary magnetic field of 4 nT. Similar conditions can be expected for the next 24 hours. Nevertheless, a possible arrival of the CME from 12 June may create distrubed conditions.

Geomagnetism

Geomagnetic conditions were quiet at planetary levels (Kp up to 2) and quiet to unsettled locally (K_Bel up to 3). Similar 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 slightly above the 1000 pfu alert threshold in the past 24 hours. The flux is expected to fluctuate around the alert threshold 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): 069, based on 11 stations.

Solar indices for 14 Jun 2026

Wolf number Catania	///
10cm solar flux	128
AK Chambon La Forêt	012
AK Wingst	008
Estimated Ap	008
Estimated international sunspot number	066 - Based on 22 stations

Noticeable events summary

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

All times in UTC

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