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Daily bulletin on solar and geomagnetic activity from the SIDC

Vydáno: 2022 Jun 20 1231 UTC

SIDC Forecast

Sluneční erupce

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

Geomagnetism

Quiet (A<20 and K<4)

Sluneční protony

Quiet

	10cm flux	Ap
20 Jun 2022	143	010
21 Jun 2022	142	008
22 Jun 2022	141	007

Bulletin

Beside the number of sunspots on the solar disc facing Earth, the solar flaring activity was at low levels. Several C-class flares were observed from different sunspot groups. The larger ones were a C5.0-class from Catania sunspot group 45 (NOAA active region 3030) at 01:34 UTC, and a C5.7-class from Catania sunspot group 53 (NOAA active region 3038) at 06:18 UTC.

No Earth-directed Coronal Mass Ejections (CMEs) have been detected in the available coronagraph images over the past 24 hours.

The greater than 10 MeV proton flux was at nominal levels over the past 24 hours and is expected to remain so for the next 24 hours. The greater than 2 MeV electron flux exceeded the 1000 pfu alert threshold in response to the high solar wind speed associated with the Coronal Hole in the past days. It is expected to remain so during the next 24 hours. The electron fluence was at moderate levels and is expected to remain so.

The solar wind parameters in Earth environment continued to be elevated due to the influence of the fast solar wind speed streams associated with the equatorial coronal hole (positive polarity) that reached the central meridian last week. The solar wind speed ranged between 471 km/s and 629 km/s. The interplanetary magnetic field magnitude showed values between 1.5 nT and 10.0 nT. The Bz component of the interplanetary magnetic field was predominantly negative and fluctuated between -5.4 nT and 6.1 nT. The enhanced solar wind conditions are expected to persist as long as Earth remains under the influence of the solar wind associated with the coronal hole.

The geomagnetic conditions were quiet to unsettle due to the elevated the solar wind conditions (NOAA Kp and local K-Belgium 1-3). The geomagnetic conditions are expected to be quiet with periods of unsettled condition as long as Earth remains under the influence of the solar wind associated with the coronal hole.

Today's estimated international sunspot number (ISN): 100, based on 14 stations.

Solar indices for 19 Jun 2022

Wolf number Catania	///
10cm solar flux	144
AK Chambon La Forêt	014
AK Wingst	014
Estimated Ap	016
Estimated international sunspot number	123 - Based on 23 stations

Noticeable events summary

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

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