Vaata neljapäev, 19 aprill 2018 arhiivi

Daily bulletin on solar and geomagnetic activity from the SIDC

Välja antud: 2018 Apr 19 1231 UTC

SIDC Forecast

Päikesepursked ehk loited

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

Geomagnetism

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

Päikese prootonid

Quiet

	10cm flux	Ap
19 Apr 2018	071	007
20 Apr 2018	073	016
21 Apr 2018	072	007

Bulletin

During last 24 hours only few low B-class were reported. All flaring activity originated from the active region which is rotating from the behind of the East solar limb. This active region might be the source of B-class and isolated C-class flares in the coming hours. The coronagraph images do not show signatures of a possibly Earth directed CME. The solar protons remain at the background level.

The solar wind speed is about 280 km/s and the interplanetary magnetic field magnitude is rather low with the value of about 2 nT. The increase of the solar wind speed, associated with equatorial coronal hole which reached central meridian on April 16 is expected later today, or tomorrow morning. The geomagnetic conditions are presently quiet. We expect quiet to unsettled conditions later today and possibly active geomagnetic conditions tomorrow.

Today's estimated international sunspot number (ISN): 007, based on 27 stations.

Solar indices for 18 Apr 2018

Wolf number Catania	///
10cm solar flux	071
AK Chambon La Forêt	010
AK Wingst	006
Estimated Ap	006
Estimated international sunspot number	000 - Based on 29 stations

Noticeable events summary

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

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