Перегляд архіву середа, 24 квітня 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Випущено: 2019 Apr 24 1230 UTC

SIDC Forecast

Сонячні спалахи

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

Geomagnetism

Quiet (A<20 and K<4)

Сонячні протони

Quiet

	10cm flux	Ap
24 Apr 2019	069	010
25 Apr 2019	069	007
26 Apr 2019	069	007

Bulletin

No flares in the past 24 h. No active regions visible on the solar disk. Solar activity is expected to be low.

No Earth directed CMEs in past 24 h. Solar protons have remained at background levels over the past 24 hours.

The solar wind speed is at 420 km/s with interplanetary magnetic field magnitude of 4 nT. Geomagnetic conditions reached active levels locally at Dourbes (K = 4) between 00:00 UT and 03:00 UT. At planetary levels Kp was at 3 between 18:00 UT on April 23 and 03:00 UT today. This was due to the expected arrival of a solar wind stream from a negative polarity coronal hole. The effect was weak, as the speeds did not go beyond 430 km/s with interplanetary magnetic fields up to 11 nT, with Bz reaching -8nT. Quiet to unsettled conditions expected for the next 48 h.

Today's estimated international sunspot number (ISN): 000, based on 16 stations.

Solar indices for 23 Apr 2019

Wolf number Catania	///
10cm solar flux	069
AK Chambon La Forêt	025
AK Wingst	///
Estimated Ap	011
Estimated international sunspot number	000 - Based on 26 stations

Noticeable events summary

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

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