Viewing archive of Monday, 30 April 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Apr 30 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
30 Apr 2018	070	006
01 May 2018	070	007
02 May 2018	070	007

Bulletin

Solar activity was very low with no spotted regions on the visible disk. The solar X-ray flux was below B level and this is expected to remain so. No Earth directed CMEs have been observed in coronagraph data. The >10MeV proton flux levels were at background values and are expected to remain so.

Solar wind conditions were near nominal until around 2:00UT this morning when an increase in Solar wind speed has set in. Currently, Solar wind speed reaches moderate values between 440-470km/s. Total magnetic field reached just over 8nT and Bz saw a very brief peak down to -6.4nT, but magnetic field values now continue to be at nominal levels (3-5nT). Solar wind speed may remain slightly elevated for a while but is expected to soon return to nominal conditions.

Geomagnetic conditions have been quiet to unsettled (local K Dourbes 0-2 and NOAA Kp 0-3) with similar conditions expected over the next days.

Today's estimated international sunspot number (ISN): 000, based on 17 stations.

Solar indices for 29 Apr 2018

Wolf number Catania	///
10cm solar flux	071
AK Chambon La Forêt	009
AK Wingst	004
Estimated Ap	003
Estimated international sunspot number	000 - Based on 20 stations

Noticeable events summary

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

All times in UTC

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