Viewing archive of Tuesday, 30 May 2023

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2023 May 30 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
30 May 2023	154	007
31 May 2023	152	007
01 Jun 2023	150	011

Solar Active Regions and flaring

There are ten visible active regions on the solar disk. NOAA AR 3315 remains the most complex region, but it has lost its delta spot and it has now a beta-gamma magnetic field configuration. NOAA AR 3310 has been producing the largest flares, including two M-class flares. This region is currently rotating out of view over the west limb. The largest flare of the past 24 hours was an M1.3 one, peaking at 10:22 UTC, from NOAA AR 3310. There will be C-class flares in the next 24 hours, and more M-class flares can be expected.

Coronal mass ejections

No Earth-directed coronal mass ejections (CMEs) were detected in the available coronagraph imagery.

Coronal holes

A positive polarity coronal hole in the southern hemisphere crossed the central meridian yesterday. A related high speed solar wind stream may arrive to the Earth on 1-2 June.

Solar wind

The Earth is inside slow solar wind, with an interplanetary magnetic field around 7 nT and solar wind speed of about 380 km/s. Similar conditions are expected for the next 24 hours, with low chances of observing a glancing blow from the 26 May CME.

Geomagnetism

The geomagnetic conditions over the past 24 hours were quiet (K_Belgium and Kp below 3). Mostly quiet geomagnetic conditions are expected, with chances of active levels if we see the glancing blow from the 26 May CME.

Proton flux levels

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

Electron fluxes at geostationary orbit

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

Today's estimated international sunspot number (ISN): 157, based on 20 stations.

Solar indices for 29 May 2023

Wolf number Catania	169
10cm solar flux	154
AK Chambon La Forêt	///
AK Wingst	005
Estimated Ap	004
Estimated international sunspot number	157 - Based on 28 stations

Noticeable events summary

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

All times in UTC

<< Go to daily overview page