Viewing archive of Thursday, 30 May 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 May 30 1231 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
30 May 2019	069	013
31 May 2019	069	010
01 Jun 2019	070	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 under the influence of the solar wind associated with the negative polarity equatorial coronal hole which began to traverse the central meridian on May 24. The solar wind speed was around the values of about 505 and 566 km/s. The interplanetary magnetic field slowly decreased and is now below 5 nT, and the southward component fluctuated between -6 nT and +5 nT. The solar wind parameters are expected to remain enhanced today and tomorrow.

The geomagnetic conditions have been mostly unsettled with Kp index (NOAA) and local K index (Dourbes) ranging between 1 and 3. Active conditions with intervals of K-Dourbes = 4 remained possible although not very likely today and tomorrow, due to the high-speed solar wind stream associated negative polarity equatorial coronal hole.

Today's estimated international sunspot number (ISN): 000, based on 20 stations.

Solar indices for 29 May 2019

Wolf number Catania	///
10cm solar flux	068
AK Chambon La Forêt	019
AK Wingst	018
Estimated Ap	019
Estimated international sunspot number	013 - Based on 16 stations

Noticeable events summary

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

All times in UTC

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