:Issued: 2026 Mar 14 1231 UTC
:Product: documentation at http://www.sidc.be/products/meu
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# DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC     #
# (RWC Belgium)                                                      #
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SIDC URSIGRAM 60314
SIDC SOLAR BULLETIN 14 Mar 2026, 1230UT
SIDC FORECAST 
SOLAR FLARES  : C-class flares expected, (probability >=50%)
GEOMAGNETISM  : Minor storm expected (A>=30 or K=5)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 14 Mar 2026  10CM FLUX: 120 / AP: 038
PREDICTIONS FOR 15 Mar 2026  10CM FLUX: 120 / AP: 022
PREDICTIONS FOR 16 Mar 2026  10CM FLUX: 120 / AP: 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.

Coronal mass ejections: 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.


Coronal holes: 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.

Solar wind: 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 GEO: 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 ISN  : 066, BASED ON 11 STATIONS.

SOLAR INDICES FOR 13 Mar 2026
WOLF NUMBER CATANIA    : 125
10CM SOLAR FLUX        : ///
AK CHAMBON LA FORET    : 046
AK WINGST              : 019
ESTIMATED AP           : 021
ESTIMATED ISN          : 084, BASED ON 20 STATIONS.

NOTICEABLE EVENTS SUMMARY
DAY BEGIN MAX  END  LOC    XRAY OP  10CM Catania/NOAA RADIO_BURST_TYPES 
NONE
END

BT

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