Vaata reede, 21 veebruar 2020 arhiivi

Daily bulletin on solar and geomagnetic activity from the SIDC

Välja antud: 2020 Feb 21 1231 UTC

SIDC Forecast

Päikesepursked ehk loited

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

Geomagnetism

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

Päikese prootonid

Quiet

	10cm flux	Ap
21 Feb 2020	071	018
22 Feb 2020	071	007
23 Feb 2020	071	007

Bulletin

No active regions visible on the Sun. No flares observed, nor expected.

No Earth directed CMEs in the past 24 h. Solar protons have remained at background levels over the past 24 hours.

The solar wind speed is at 500 km/s with interplanetary magnetic field magnitude of 5 nT. Mostly quiet to unsettled conditions (K and Kp = 1 - 3) were observed in the past 24 h, with one period of active conditions (K and Kp = 4, at midnight). The solar wind speed has been increasing steadily since yesterday, due to the influence of solar wind streams from small patchy negative polarity equatorial coronal holes. Mostly unsettled conditions, with possible active periods, expected for the next 48 h.

Today's estimated international sunspot number (ISN): 000, based on 19 stations.

Solar indices for 20 Feb 2020

Wolf number Catania	000
10cm solar flux	071
AK Chambon La Forêt	015
AK Wingst	009
Estimated Ap	008
Estimated international sunspot number	000 - Based on 22 stations

Noticeable events summary

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

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