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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2019 May 29 1230 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Active conditions expected (A>=20 or K=4)

Protoni solari

Quiet

	10cm flux	Ap
29 May 2019	068	017
30 May 2019	069	013
31 May 2019	069	007

Bulletin

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

No Earth directed Coronal Mass Ejection (CME) has been detected in the available coronagraph imagery. 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 now under the influence of the fast solar wind associated with the negative polarity equatorial coronal hole which began to traverse the central meridian on May 24. The solar wind increased up to current values of about 560 km/s. The interplanetary magnetic field strength peaked for a short duration at 12 nT, and the southward component ranged between -10 nT and +9 nT. The solar wind parameters are expected to remain enhanced today and tomorrow.

The geomagnetic conditions have been mostly quiet to unsettled with Kp index (NOAA) and local K index (Dourbes) ranging between 1 and 3. A short period of active condition was observed by Kp index (NOAA) on May 29 at 06:00 UT. Active conditions with intervals of K-Dourbes = 4 are possible today and tomorrow, due to the high-speed solar wind stream associated negative polarity equatorial coronal hole.

Today's estimated international sunspot number (ISN): 013, based on 14 stations.

Solar indices for 28 May 2019

Wolf number Catania	000
10cm solar flux	///
AK Chambon La Forêt	027
AK Wingst	012
Estimated Ap	012
Estimated international sunspot number	000 - Based on 31 stations

Noticeable events summary

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

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