Viewing archive of Friday, 1 February 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Feb 01 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
01 Feb 2019	072	023
02 Feb 2019	074	019
03 Feb 2019	075	007

Bulletin

There are no active regions on the visible solar disk, no C-class flares in past 24 h (only minor B-class flaring). Solar activity has been very low and is expected to remain so, although a region rotating into view from the east limb may increase activity slightly in the coming hours.

No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar protons have remained at background levels over the past 24 hours.

The solar wind speed is at 550 km/s with interplanetary magnetic fields of 10 nT. Geomagnetic conditions reached active values locally (k=4 at Dourbes) and minor storm levels planetary (Kp=5), from 21:00 UT until midnight, as a consequence of the arrival of the high speed stream from a negative polarity coronal hole (with speeds reaching 550 km/s and magnetic fields up to 20 nT). Disturbed geomagnetic conditions are expected for the next 48 hours (up to minor storm levels).

Today's estimated international sunspot number (ISN): 000, based on 10 stations.

Solar indices for 31 Jan 2019

Wolf number Catania	000
10cm solar flux	072
AK Chambon La Forêt	035
AK Wingst	018
Estimated Ap	019
Estimated international sunspot number	/// - Based on /// stations

Noticeable events summary

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

All times in UTC

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