Перегляд архіву середа, 19 лютого 2020

Daily bulletin on solar and geomagnetic activity from the SIDC

Випущено: 2020 Feb 19 1231 UTC

SIDC Forecast

Сонячні спалахи

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

Geomagnetism

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

Сонячні протони

Quiet

	10cm flux	Ap
19 Feb 2020	071	017
20 Feb 2020	071	015
21 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 485 km/s with interplanetary magnetic field magnitude of 5 nT. Geomagnetic conditions reached K = 4 locally at Dourbes and Kp = 5 overnight, due to long periods of negative Bz (reaching -12 nT). This is due to the expected solar wind streams from small patchy negative polarity equatorial coronal holes, probably mixed with a slow ICME (possibly leaving the Sun on 12 February). More active periods can be expected in the coming 48 h due to these high speed streams (including the low latitudinal extension of the southern polar coronal hole).

Today's estimated international sunspot number (ISN): 000, based on 20 stations.

Solar indices for 18 Feb 2020

Wolf number Catania	000
10cm solar flux	071
AK Chambon La Forêt	026
AK Wingst	014
Estimated Ap	013
Estimated international sunspot number	000 - Based on 25 stations

Noticeable events summary

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

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