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Daily bulletin on solar and geomagnetic activity from the SIDC

Vydáno: 2019 Mar 07 1230 UTC

SIDC Forecast

Sluneční erupce

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

Geomagnetism

Quiet (A<20 and K<4)

Sluneční protony

Quiet

	10cm flux	Ap
07 Mar 2019	072	005
08 Mar 2019	073	007
09 Mar 2019	073	006

Bulletin

The solar activity has been quiet over the past 24 hours. The X-ray flux was below C-level. The sunspot (Catania sunspot group 9, NOAA Active region 2734) remained stable and continued to show mild activity with few A and small B-class flares. Solar activity is expected to remain at low levels with a very small chance of C-class flare.

No Earth directed Coronal Mass Ejection has been observed. 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 are currently slightly enhanced due to several small patchy equatorial coronal holes (negative polarity) that have now rotated into the west hemisphere. During the last 24-hour, the solar wind speed was about 500 km/s at the beginning of the period and then decreased to about 400 km/s. The total interplanetary magnetic field strength ranged between 5 nT and 8 nT. The Bz component fluctuated between -4 nT and 6.5 nT. Another small patchy equatorial coronal hole (negative polarity) is currently facing Earth. The slightly enhanced solar wind parameters are expected to persist 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 1 and 3, and Kp (NOAA) ranging from 1 and 2. In response to the slightly enhanced interplanetary magnetic field and possible prolonged period of southward directed Bz component, the geomagnetic conditions are expected to remain quiet to unsettle.

Today's estimated international sunspot number (ISN): 017, based on 15 stations.

Solar indices for 06 Mar 2019

Wolf number Catania	021
10cm solar flux	073
AK Chambon La Forêt	012
AK Wingst	009
Estimated Ap	008
Estimated international sunspot number	017 - Based on 21 stations

Noticeable events summary

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

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