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Daily bulletin on solar and geomagnetic activity from the SIDC

Випущено: 2019 Mar 18 1230 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
18 Mar 2019	069	005
19 Mar 2019	070	011
20 Mar 2019	071	007

Bulletin

There are no active regions visible on the solar disk. No C-class flares in past 24 h. Solar activity is expected to remain at very low levels.

No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar protons have remained at background levels over the past 24 hours.

The solar wind speed is at 350 km/s with interplanetary magnetic fields of 5 nT. Geomagnetic conditions have been quiet to unsettled (K = 1 - 3) in the past 24 h. A relatively long magnetic field with low variability together with low temperature could have marked the arrival yesterday of the March 12 CME. The effect of a high speed stream from a small equatorial coronal hole, with positive magnetic field polarity, may reach the Earth in about 24 h and cause up to active geomagnetic storm conditions (K = 4).

Today's estimated international sunspot number (ISN): 013, based on 17 stations.

Solar indices for 17 Mar 2019

Wolf number Catania	///
10cm solar flux	069
AK Chambon La Forêt	011
AK Wingst	015
Estimated Ap	018
Estimated international sunspot number	000 - Based on 27 stations

Noticeable events summary

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

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