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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2019 Feb 04 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
04 Feb 2019	071	003
05 Feb 2019	070	004
06 Feb 2019	069	004

Bulletin

The solar activity has been quiet over the past 24 hours. The visible solar disc was spotless, and the X-ray flux remained below B-level. Flaring conditions is expected to remain at low levels.

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 Earth is still inside the influence of the speed stream associated with negative polarity coronal hole that had reached the central meridian last week. The solar wind speed decreased from about 568 km/s to 410 km/s over the past 24 hours, and the interplanetary magnetic fields remained below 5 nT. The solar wind parameters are expected to globally return towards an ambient background and slow solar wind speed regime.

The geomagnetic conditions were mostly quiet and ranged between Kp index 0-3 (NOAA) and local K index 0-2 (Dourbes) over the past 24 hours. They are expected to remain mostly quiet, unsettled conditions periods remain likely to happen as the solar wind speed is still elevated (due to the extended and patchy shape of the coronal hole).

Today's estimated international sunspot number (ISN): 000, based on 13 stations.

Solar indices for 03 Feb 2019

Wolf number Catania	///
10cm solar flux	071
AK Chambon La Forêt	013
AK Wingst	012
Estimated Ap	011
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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