Viewing archive of Sunday, 18 February 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Feb 18 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
18 Feb 2018	069	018
19 Feb 2018	068	008
20 Feb 2018	068	006

Bulletin

Over the past 24 hours solar activity has been low. No significant flares have been recorded. There are currently no Active Regions on the solar disk. The greater than 10MeV proton flux remained at background levels over the past 24 hours. No Earth directed Coronal Mass Ejections (CMEs) have been detected. Over the next 24 hours solar activity is expected to be low. The solar wind speed has increased from around 475 to 600 km/s over the past 24 hours. The total magnetic field strength has fluctuated around 6 nT, the Bz component has fluctuated between -5 and +6 nT. Geomagnetic conditions ranged between Kp index 1-4 (NOAA) and local K index 1-4 (Dourbes) over the past 24 hours. A High Speed Stream (HSS) associated with a large coronal hole that passed the central meridian a couple of days ago has enhanced solar wind speeds, but should abate over the next 24 hours. Geomagnetic conditions are expected to be quiet to unsettled.

Today's estimated international sunspot number (ISN): 000, based on 19 stations.

Solar indices for 17 Feb 2018

Wolf number Catania	///
10cm solar flux	069
AK Chambon La Forêt	019
AK Wingst	014
Estimated Ap	013
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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