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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2026 Mar 14 1231 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Minor storm expected (A>=30 or K=5)

Protoni solari

Quiet

	10cm flux	Ap
14 Mar 2026	120	038
15 Mar 2026	120	022
16 Mar 2026	120	007

Solar Active Regions and flaring

Solar flaring activity was low over the past 24 hours, with only C-class flares identified. The largest flare was a C8.9 flare (SIDC Flare 7187) peaking on March 13 at 20:23 UTC, which was produced by SIDC Sunspot Group 820 (NOAA Active Region 4392). Most of the rest of the flaring was coming from on the westlimb (SSG 805/NOAA Active Region 4384) or behind the west limb. A total of 7 numbered sunspot groups were identified on the disk over the past 24 hours, all relatively small and with simple magnetic configuration (alpha or beta). Solar flaring activity is expected to be low over the next 24 hours, with C-class flares very likely and a chance for M-class flares.

Espulsioni di massa coronale

The Coronal Mass Ejection (CME) detected in SOHO/LASCO-C2 data from 00:48 UTC March 13, was mainly directed southwards, and is not expected to impact Earth. No new Earth-directed Coronal Mass Ejections (CMEs) have been detected in the available coronagraph images.

Fori coronali

The large positive polarity trans-equatorial coronal hole (SIDC Coronal Hole 154) is still crossing the central meridian, now with it's southern midlatitude extension. The associated high-speed stream is currently enhancing solar wind conditions at Earth.

Vento solare

The solar wind conditions were enhanced over the past 24 hours, due to the influence of the high-speed streams associated with the SIDC coronal hole 154 (which first reached the central meridian in Mar 11). The interplanetary magnetic field reached 13 nT, with the Bz reaching a minimum value of -10 nT. The solar wind velocity reached 700 km/s. Enhanced solar wind conditions are expected in the next 24 hours.

Geomagnetism

The geomagnetic conditions reached globally moderate storm (NOAA Kp 6) and locally minor storm conditions (K BEL 5) since 22:00 UTC Mar 13, due to the high speed stream arrival of the SIDC CH 154. Active to minor storm conditions are expected for the next 24 hours.

Proton flux levels

The greater than 10 MeV proton flux, as measured by the GOES-19 satellite, was at background levels over the past 24 hours and is likely to remain so in the next 24 hours.

Electron fluxes at geostationary orbit

The greater than 2 MeV electron flux remained below the 1000 pfu alert threshold, and is expected to remain below the threshold during the next 24 hours. The 24h electron fluence was at normal levels and is expected to remain so.

Today's estimated international sunspot number (ISN): 066, based on 11 stations.

Solar indices for 13 Mar 2026

Wolf number Catania	125
10cm solar flux	///
AK Chambon La Forêt	046
AK Wingst	019
Estimated Ap	021
Estimated international sunspot number	084 - Based on 20 stations

Noticeable events summary

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

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