Viewing archive of Sunday, 17 March 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Mar 17 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
17 Mar 2019	069	018
18 Mar 2019	069	008
19 Mar 2019	069	015

Bulletin

X-ray flux remained below B level. And with a spotless disk, X-ray flux is expected to remain below C level.

No new Earth directed CME's have been detected in coronagraph data.

The Solar proton flux levels were at background values and are expected to remain so.

As expected, solar wind speed further enhanced reaching over 450 km/s around midnight. Total magnetic field was initially mainly in the 4-7nT range with a gradual build up towards current values around 8nT. The Bz component was pronounced southward with an extended period of -6nT and even reached close to -8nT. Magnetic field phi angle showed a sector change just after 5:00UT at which time also Solar wind speed dropped and then further decreased to under 400 km/s. Solar wind is expected to approach nominal conditions with on March 19 the influences of an equatorial positive polarity coronal hole setting in.

Geomagnetic conditions reached active and even minor geomagnetic storm levels under the elevated solar wind conditions. Geomagnetic conditions are expected to be quiet to unsettled with later on March 19 renewed active conditions expected.

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

Solar indices for 16 Mar 2019

Wolf number Catania	///
10cm solar flux	070
AK Chambon La Forêt	030
AK Wingst	015
Estimated Ap	014
Estimated international sunspot number	000 - Based on 21 stations

Noticeable events summary

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

All times in UTC

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