Viewing archive of Friday, 15 March 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Mar 15 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
15 Mar 2019	070	013
16 Mar 2019	070	021
17 Mar 2019	070	012

Bulletin

X-ray flux remained below B level. With a spotless disk, again 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.

An equatorial coronal hole of positive polarity has crossed the central meridian overnight. It may influence the Solar wind from around late March 18.

Solar wind first saw a gradual slight increase of total magnetic field towards 8.5nT with a predominantly negative Bz component (peaking under -6nT) while other parameters remained stable with a Solar wind speed of 340 km/s. At 6:17UT a slow forward shock occurred, with speed jumping to around 400 km/s, while total magnetic field dipped down to around 4.5nT. Solar wind speed is now around 380 km/s. Solar wind conditions may further enhance later in the day under influence of the equatorial coronal hole that crossed central meridian late March 10. Towards March 17 there is a small possibility of some slow CME transients associated to the March 12 CME.

Geomagnetic conditions were quiet to unsettled (both NOAA Kp and local K Dourbes 1-3). Geomagnetic conditions are expected to become unsettled with a possibility for active periods under high speed stream influence.

Today's estimated international sunspot number (ISN): 000, based on 12 stations.

Solar indices for 14 Mar 2019

Wolf number Catania	014
10cm solar flux	070
AK Chambon La Forêt	023
AK Wingst	011
Estimated Ap	010
Estimated international sunspot number	007 - Based on 19 stations

Noticeable events summary

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

All times in UTC

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