Viewing archive of Wednesday, 27 February 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Feb 27 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
27 Feb 2019	071	012
28 Feb 2019	070	021
01 Mar 2019	071	012

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 W55S15.

Solar activity is expected to remain at low levels.

The solar wind speed has fluctuated between 300 and 340 km/s (DSCOVR) over the past 24 hours, with a small increase experienced over the past 6 hours. The total magnetic field strength has fluctuated between 3 nT and 7 nT (DSCOVR). The Bz component fluctuated around 0 nT, ranging between -6 and +3 nT, but has been mainly negative for the past 3 hours. Geomagnetic conditions ranged between Kp index 0-1 (NOAA) and local K index 0-2 (Dourbes) over the past 24 hours. A negative polarity coronal hole is currently positioned near W55S15 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 later today and for the next few days, the increasing negative Bz and enhancements in solar wind speed over the past few hours may indicate the arrival of the CIR/HSS. As a consequence geomagnetic activity is expected to reach to active conditions later today, and possibly persist for the next few days.

Geomagnetic conditions are expected to be unsettled to active from later today.

Today's estimated international sunspot number (ISN): 000, based on 20 stations.

Solar indices for 26 Feb 2019

Wolf number Catania	000
10cm solar flux	071
AK Chambon La Forêt	005
AK Wingst	002
Estimated Ap	002
Estimated international sunspot number	000 - Based on 34 stations

Noticeable events summary

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

All times in UTC

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