Viewing archive of Friday, 2 April 2021

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2021 Apr 02 1232 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
02 Apr 2021	076	009
03 Apr 2021	076	011
04 Apr 2021	076	007

Bulletin

The solar activity has been quiet over the past 24 hours. The visible solar disc is spotless and the X-ray flux is below B-level. The solar activity is expected to remain at low levels over the next 24 hours.

No Earth-directed coronal mass ejections (CMEs) was observed in the available coronagraph imagery.

The greater than 10 MeV proton flux was at nominal levels over the past 24 hours and is expected to remain so for the next 24 hours. The greater than 2 MeV electron flux was below the 1000 pfu threshold in the past 24 hours and is expected to remain so during the next 24 hours. The 24h electron fluence is at normal levels in the last 24 hours and is expected to stay at normal levels for the next 24 hours.

The solar wind parameters (ACE and DSCOVR) were mostly at background levels: The solar wind speed ranged between 350 km/s and 410 km/s . The interplanetary magnetic field magnitude was below 6.0 nT, and Bz components varied between -4.3 nT and 4.0 nT. The high-speed streams associated with the equatorial coronal hole (positive magnetic polarity and facing Earth on Mars 31) is expected to slightly enhanced the solar wind conditions near Earth later today and tomorrow on April 2 and 3.

Geomagnetic conditions were quiet (Kp and K-Dourbes: 0-2). Unsettled conditions with possible periods of active conditions are expected later on April 2, due to the expected influence of the high-speed streams associated with the equatorial coronal hole (facing Earth on Mars 31).

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

Solar indices for 01 Apr 2021

Wolf number Catania	000
10cm solar flux	078
AK Chambon La Forêt	010
AK Wingst	010
Estimated Ap	008
Estimated international sunspot number	000 - Based on 31 stations

Noticeable events summary

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

All times in UTC

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