Viewing archive of Saturday, 13 April 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Apr 13 1230 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
13 Apr 2019	077	009
14 Apr 2019	077	008
15 Apr 2019	076	008

Bulletin

Over the past 24 hours solar activity has been low. The largest flare was a B7.1 class flare. Active Region (AR) 2738 (Mcintosh class:Cho; Mag. type:Beta) has produced all the flaring activity, including the B7.1 class flare (note: this peaked at 11:37 UT on 12-Apr-2018, but data was unavailable for yesterdays Forecast), the region has shown some evidence of flux emergence and cancellation in HMI magnetogram observations, this may increase flaring activity. No significant filament channels have been seen on the solar disk. No Earth directed CMEs have been detected. There are no significant low latitude coronal holes on the solar disk. The greater-than 10MeV proton flux remained at background levels over the past 24 hours. Solar activity is expected to remain low over the next 24 hours with a reasonable chance of a C-class flare from AR 2738.

The solar wind speed has fluctuated between 400 and 460 km/s over the past 24 hours. The total magnetic field strength has fluctuated around 5 nT. The Bz component has fluctuated around 0 nT, ranging between -5 and +4 nT. Geomagnetic conditions ranged between Kp index 1-3 (NOAA) and local K index 1-3 (Dourbes) over the past 24 hours. Geomagnetic conditions are expected to be quiet.

Today's estimated international sunspot number (ISN): 014, based on 18 stations.

Solar indices for 12 Apr 2019

Wolf number Catania	///
10cm solar flux	077
AK Chambon La Forêt	015
AK Wingst	008
Estimated Ap	008
Estimated international sunspot number	015 - Based on 24 stations

Noticeable events summary

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

All times in UTC

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