Viewing archive of Tuesday, 26 February 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Feb 26 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
26 Feb 2019	070	004
27 Feb 2019	070	019
28 Feb 2019	070	021

Bulletin

Over the past 24 hours solar activity has been low. No significant flares have been recorded. No significant Active Regions (AR) or filament channels are present on the solar disk. The greater-than 10 MeV proton flux was at nominal values. A negative polarity equatorial coronal hole (CH) has reached W45S15.

Solar activity is expected to remain at low levels.

The solar wind speed has fluctuated between 320 and 340 km/s (DSCOVR) over the past 24 hours. The total magnetic field strength has fluctuated around 4 nT (DSCOVR). The Bz component fluctuated around 0 nT, ranging between -2 and +4 nT. Geomagnetic conditions ranged between Kp index 0-1 (NOAA) and local K index 0-3 (Dourbes) over the past 24 hours. A negative polarity coronal hole is currently positioned near W45S15 in the Western hemisphere of the Sun and the associated co-rotating interaction region (CIR) and high-speed stream (HSS) may enhance solar wind speeds towards the end of the day and for the next few days, as a consequence geomagnetic activity is expected to reach to active conditions.

Geomagnetic conditions are expected to be unsettled and possibly active from later today / early tomorrow.

Today's estimated international sunspot number (ISN): 000, based on 24 stations.

Solar indices for 25 Feb 2019

Wolf number Catania	000
10cm solar flux	070
AK Chambon La Forêt	005
AK Wingst	002
Estimated Ap	001
Estimated international sunspot number	000 - Based on 35 stations

Noticeable events summary

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

All times in UTC

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