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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2019 Mar 09 1230 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

	10cm flux	Ap
09 Mar 2019	072	006
10 Mar 2019	072	008
11 Mar 2019	071	007

Bulletin

The solar activity has been quiet over the past 24 hours. The unique sunspot group on the disc (Catania sunspot group 9, NOAA Active Region 2734) continued to decay and did not produce any flare. The X-ray flux remained below B-level and the solar activity is expected to remain at low levels.

A Coronal Mass Ejection (CME) has been observed in SOHO/LASCO-C2 on March 8 at 22:12 UT. Its projected principal components (in the plane of the sky) was South-East. No source region was identified on the solar disc that faces Earth, therefore, this CME is believed to be back side, and probably associated with a filament as no active region is observed on STEREO/EUVI-A images. The greater than 10 MeV solar protons flux remained at nominal levels over the past 24 hours and is expected to remain so.

The solar wind parameters continued to be slightly enhanced during the last 24 hours due to several small patchy equatorial coronal holes. The solar wind speed ranged between 400 km/s and 450 km/s. The total interplanetary magnetic field strength remained below 7 nT. The Bz component fluctuated between -4.5 nT and 4.7 nT. The slightly enhanced solar wind parameters are expected to persistence for more days, due to all those small patchy equatorial coronal holes on the surface of the sun.

The geomagnetic conditions were quiet to unsettle over the past 24 hours, with K-index (Dourbes) ranging from 0 and 3, and Kp (NOAA) ranging from 0 and 2. The geomagnetic conditions are expected to be mainly quiet, but in response to the slightly enhanced interplanetary magnetic field and possible prolonged period of southward directed Bz component, sort period of unsettled conditions may also occur.

Today's estimated international sunspot number (ISN): 011, based on 12 stations.

Solar indices for 08 Mar 2019

Wolf number Catania	014
10cm solar flux	072
AK Chambon La Forêt	007
AK Wingst	///
Estimated Ap	005
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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