Viewing archive of Tuesday, 8 June 2021

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2021 Jun 08 1235 UTC

SIDC Forecast

Solar flares

Quiet conditions (<50% probability of C-class flares)

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
08 Jun 2021	082	013
09 Jun 2021	080	009
10 Jun 2021	080	005

Bulletin

Solar flaring activity is still low. The largest reported flare was C1.4 flare (peaked at 10:53 UT today) originating from the AR 2831 which is presently rotating across the West solar limb. We expect such a low level of flaring activity to continue in the coming hours. There were no Earth directed CMEs observed during last 24 hours and the proton flux levels remained at background values. The greater than 2MeV electron flux continues to be bellow the 1000 pfu threshold, and we expect it will remain so during the next 24 hours. The 24h electron fluence is at normal levels and we expect it will stay so in the coming 24 hours.

The in situ observations indicate arrival of the solar wind originating from the negative polarity coronal hole (extension of the southern polar coronal hole), starting from the morning of June 07. The increase of the interplanetary magnetic field magnitude (up to about 11 nT) and solar wind density, observed at about 06:30 UT, was followed by the temperature and solar wind speed increase. Shortly after 01:00 UT this morning, the solar wind speed reached its local maximum of 550 km/s. The solar wind speed is presently about 480 km/s and the interplanetary magnetic field magnitude is 4 nT.

The geomagnetic conditions were mostly quiet to unsettled during last 24 hours. The arrival of the fast solar wind induced active geomagnetic conditions yesterday evening and around midnight. Local station at Dourbes reported K-index= 4 and NOAA reported Kp=4. The geomagnetic conditions are presently quiet to unsettled and we expect them to stay so in the coming hours.

Today's estimated international sunspot number (ISN): 036, based on 25 stations.

Solar indices for 07 Jun 2021

Wolf number Catania	054
10cm solar flux	081
AK Chambon La Forêt	024
AK Wingst	016
Estimated Ap	015
Estimated international sunspot number	050 - Based on 36 stations

Noticeable events summary

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

All times in UTC

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