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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2017 Feb 01 1311 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

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

Protoni solari

Quiet

	10cm flux	Ap
01 Feb 2017	077	018
02 Feb 2017	077	013
03 Feb 2017	076	013

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, however AR 2632 has shown some evidence of growth, which may increase flaring 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 located in the Western hemisphere. The solar wind speed has been slowly decreasing from around 800 to 600 km/s over the past 24 hours. The total magnetic field strength has fluctuated around 7 nT. The Bz component been mainly negative fluctuating between -7 and +7 nT. Geomagnetic conditions ranged between Kp index 3-5 (NOAA) and local K index 2-4 (Dourbes) over the past 24 hours, peaking at 00:00 UT this morning. The High Speed Stream (HSS) associated with the large negative polarity trans-equatorial coronal hole extending from the Southern pole, associated with a negative Bz, caused the elevated geomagnetic conditions. The effects of the HSS are expected to persist for the next couple of days and consequently active geomagnetic conditions may also be experienced.

Today's estimated international sunspot number (ISN): 038, based on 08 stations.

Solar indices for 31 Jan 2017

Wolf number Catania	041
10cm solar flux	076
AK Chambon La Forêt	043
AK Wingst	027
Estimated Ap	027
Estimated international sunspot number	/// - Based on /// stations

Noticeable events summary

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

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