Viewing archive of Wednesday, 18 April 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Apr 18 1230 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
18 Apr 2018	069	006
19 Apr 2018	069	009
20 Apr 2018	068	013

Bulletin

Solar activity remains to be very low, with no flares reported. We do not expect flaring activity in the coming hours. No Earth directed CMEs were observed in the coronagraph images. The solar protons continue to be at the background level.

The solar wind speed is about 300 km/s and the interplanetary magnetic field magnitude is about 5 nT. The increase of the solar wind speed, associated with equatorial coronal hole which reached central meridian on April 16 might be expected tomorrow. The arrival of the fast solar wind could induced active geomagnetic conditions. The geomagnetic conditions are presently quiet and we expect them to stay so in the coming hours.

Today's estimated international sunspot number (ISN): 000, based on 22 stations.

Solar indices for 17 Apr 2018

Wolf number Catania	011
10cm solar flux	069
AK Chambon La Forêt	007
AK Wingst	004
Estimated Ap	002
Estimated international sunspot number	011 - Based on 26 stations

Noticeable events summary

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

All times in UTC

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