Viewing archive of Sunday, 25 March 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Mar 25 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

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

Solar protons

Quiet

	10cm flux	Ap
25 Mar 2018	067	018
26 Mar 2018	068	013
27 Mar 2018	067	007

Bulletin

Solar activity was at very low levels. The solar disk remained devoid of sunspots. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal levels.

Solar activity is expected to stay at very low levels.

Solar wind near Earth was enhanced due to the influence of the negative polarity coronal hole (CH) wind stream. Solar wind speed increased from an initial 400 km/s to peak values just below 500 km/s, ending the period near 470 km/s (DSCOVR). Bz oscillated between -7 and +7 nT. The interplanetary magnetic field was predominantly directed towards the Sun. Geomagnetic activity was at quiet to unsettled levels, with Kp index recording active conditions during the 00-03UT and 03-06UT interval.

Quiet to active geomagnetic conditions are expected with a decreasing chance on an isolated minor storming episode in response to the continuing CH wind stream.

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

Solar indices for 24 Mar 2018

Wolf number Catania	///
10cm solar flux	068
AK Chambon La Forêt	018
AK Wingst	010
Estimated Ap	010
Estimated international sunspot number	000 - 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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