Viewing archive of Sunday, 8 June 2025

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2025 Jun 08 1231 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Active conditions expected (A>=20 or K=4)

Solar protons

Quiet

	10cm flux	Ap
08 Jun 2025	119	017
09 Jun 2025	115	024
10 Jun 2025	115	017

Solar Active Regions and flaring

Solar flaring activity was low, with only C-class flares recorded over the past 24 hours. The largest flare was a C3.5 flare (SIDC Flare 4582), peaking at 12:24 UTC on June 07, and was associated with an active region located just behind the northwest limb (N10W89). There are currently five numbered active regions on the visible solar disc. SIDC Sunspot Group 513 (NOAA Active Region 4105; magnetic type beta-gamma) was the main driver of the flaring activity observed over the past 24 hours, together with active regions behind the northwest limb. Other regions on the disc have simple photospheric magnetic field configurations (alpha and beta) and did not produce any significant flaring activity. 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

A wide coronal mass ejection (SIDC CME 516) was observed in LASCO/C2 coronagraph data starting at 01:36 UTC on June 08. The CME is directed primarily toward the northeast from Earth’s perspective and is probably associated with a small filament eruption in the northeastern quadrant of the solar disk. Preliminary analysis suggests that the CME is slow, with an estimated speed below 300 km/s, and is not expected to produce any significant impact at Earth. No other Earth-directed CMEs have been detected in the available coronagraph imagery over the past 24 hours.

Coronal holes

A small, low-latitude, negative polarity coronal hole (SIDC Coronal Hole 118) began crossing the central meridian in the northern hemisphere today, June 08. The associated mild high-speed stream may arrive at Earth starting from June 11.

Solar wind

Over the past 24 hours, solar wind parameters were slightly disturbed under the ongoing ICME influence. The interplanetary magnetic field reached values up to 16 nT, and the solar wind speed ranged between 420 and 450 km/s. The southward component of the interplanetary magnetic field fluctuated between -12 and 14 nT. Solar wind conditions are expected to remain slightly elevated over the next day due to the ongoing ICME and possible high-speed stream influence, with a possibility of weak enhancements on June 09 from the potential arrival of the June 06 CME (SIDC CME 515).

Geomagnetism

Geomagnetic conditions reached minor storm levels (NOAA Kp = 5-) between 18:00 and 21:00 UTC on June 07, due to the ongoing ICME influence associated with the CME from early June 03 (SIDC CME 514). Locally, active conditions were observed over Belgium (K-Bel = 4) between 18:00 and 00:00 UTC on June 07. Mostly quiet to unsettled conditions are expected over the next 24 hours, with a chance of isolated active or minor storm periods due to the ongoing ICME passage, possible high-speed stream (HSS) influence, and the potential ICME arrival from the June 06 CME (SIDC CME 515).

Proton flux levels

The greater than 10 MeV proton flux, as measured by GOES-18, was at nominal levels over the past 24 hours and is expected to remain at nominal levels over the next 24 hours.

Electron fluxes at geostationary orbit

The greater than 2 MeV electron flux, as measured by the GOES-19 satellite, remained below the 1000 pfu alert threshold over the past 24 hours and is expected to stay mostly below this threshold over the next day. The 24-hour electron fluence was at normal to moderate levels and is expected to remain at normal levels over the next 24 hours.

Today's estimated international sunspot number (ISN): 069, based on 15 stations.

Solar indices for 07 Jun 2025

Wolf number Catania	///
10cm solar flux	121
AK Chambon La Forêt	028
AK Wingst	020
Estimated Ap	021
Estimated international sunspot number	089 - Based on 14 stations

Noticeable events summary

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

All times in UTC

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