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Daily bulletin on solar and geomagnetic activity from the SIDC

Випущено: 2019 Mar 12 1232 UTC

SIDC Forecast

Сонячні спалахи

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

Geomagnetism

Quiet (A<20 and K<4)

Сонячні протони

Quiet

	10cm flux	Ap
12 Mar 2019	070	012
13 Mar 2019	069	007
14 Mar 2019	070	007

Bulletin

Solar activity was low with no flares reported and Catania group 9 (NOAA region 2734), the only region on disk, in decay. Overall probability for flaring at C level remains low.

No Earth directed CME's have been detected in coronagraph data.

The Solar proton flux levels were at background values and are expected to remain so.

Solar wind was at near nominal conditions until around 5:44 UT this morning when speed jumped to around 400 km/s and magnetic field orientation changed abruptly, both in terms of magnetic field phi angle and in terms of Bz turning Southward (-8nT) marking the arrival of the March 8 CME. Since then, total magnetic field reached a peak of 10nT and Bz saw a somewhat prolonged period of negative Bz (around -8-9nT) rotating slowly back into positive values currently. CME influences seem to be decaying but further disturbances can still occur in its wake. By the morning of March 14, we may see renewed solar wind enhancements from the equatorial coronal hole that passed central meridian late March 10.

Geomagnetic conditions were first quiet and later unsettled with the CME arrival (local K Dourbes and NOAA Kp reaching 3). With the main core of the CME passed, geomagnetic conditions are expected to remain quiet to unsettled in its wake.

Today's estimated international sunspot number (ISN): 011, based on 11 stations.

Solar indices for 11 Mar 2019

Wolf number Catania	011
10cm solar flux	070
AK Chambon La Forêt	006
AK Wingst	002
Estimated Ap	002
Estimated international sunspot number	012 - Based on 27 stations

Noticeable events summary

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

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