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Daily bulletin on solar and geomagnetic activity from the SIDC

Vydáno: 2017 Feb 05 1230 UTC

SIDC Forecast

Sluneční erupce

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

Geomagnetism

Quiet (A<20 and K<4)

Sluneční protony

Quiet

	10cm flux	Ap
05 Feb 2017	074	019
06 Feb 2017	073	011
07 Feb 2017	074	012

Bulletin

Over the past 24 hours solar activity has been very low. No significant flares have been recorded. All Active Regions (ARs) have shown low levels of activity. No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar protons have remained at background levels over the past 24 hours. Solar activity is expected to remain low over the next 24 hours with a low probability of C-class flares and a very low probability of M-class flares. A large negative polarity trans-equatorial coronal hole extending from the Southern pole is currently on the West solar limb.

The solar wind speed been fluctuating around 550 km/s, but jumped to 600 km/s at around 10:00 UT this morning. The total magnetic field strength has been around 5 nT. The Bz component fluctuated between -5 and +5 nT. Geomagnetic conditions ranged between Kp index 2-4 (NOAA) and local K index 1-3 (Dourbes) over the past 24 hours. The high speed stream (HSS) associated with the large trans-equatorial coronal hole should continue to decrease as the coronal hole moves further around the West limb. Small fluctuations in the Bz may create isolated geomagnetic active conditions over the next day.

Today's estimated international sunspot number (ISN): 012, based on 03 stations.

Solar indices for 04 Feb 2017

Wolf number Catania	///
10cm solar flux	074
AK Chambon La Forêt	020
AK Wingst	012
Estimated Ap	012
Estimated international sunspot number	011 - Based on 13 stations

Noticeable events summary

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

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