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Daily bulletin on solar and geomagnetic activity from the SIDC

Випущено: 2022 Jun 19 1231 UTC

SIDC Forecast

Сонячні спалахи

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

Geomagnetism

Quiet (A<20 and K<4)

Сонячні протони

Quiet

	10cm flux	Ap
19 Jun 2022	138	015
20 Jun 2022	135	009
21 Jun 2022	129	006

Bulletin

The solar flaring activity remains to be low, with only few low C-class flares reported during the last 24 hours. In the coming hours we can expect mostly C-class flares while isolated M-class flares are possible but not probable. No Earth-directed CMEs were detected in the available coronagraph observations over the past 24 hours.

The greater than 10 MeV proton flux was at background level during last 24 hours. The greater than 2 MeV electron flux was most of the time around the threshold value of 1000 pfu, and we expect it will remain so in the coming hours. The 24h electron fluence is presently at normal to moderate level and we expect it will stay so in the coming 24 hours.

Earth is still under prolonged influence of the fast solar wind originating from the equatorial, positive polarity coronal hole. The solar wind velocity remains to be rather high with the present value of about 590 km/s, and the interplanetary magnetic field magnitude is 6 nT. The longer interval of the negative value of the Bz component of the interplanetary magnetic field, and the high solar wind velocity induced the interval of disturbed geomatnetic conditions around the midnight today. The local station at Dourbes and NOAA reported K=4 and Kp=4, respectively. The geomagnetic conditions are presently unsettled to quiet and we expect them to stay so, altgouh the isolated intervals of active geomagnetic conditions are still possible in the coming hours.

Today's estimated international sunspot number (ISN): 123, based on 12 stations.

Solar indices for 18 Jun 2022

Wolf number Catania	///
10cm solar flux	140
AK Chambon La Forêt	026
AK Wingst	019
Estimated Ap	020
Estimated international sunspot number	165 - Based on 24 stations

Noticeable events summary

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

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