Viewing archive of Sunday, 24 July 2016

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2016 Jul 24 1230 UTC

SIDC Forecast

Solar flares

M-class flares expected (probability >=50%)

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Warning condition (activity levels expected to increase, but no numeric forecast given)

	10cm flux	Ap
24 Jul 2016	081	003
25 Jul 2016	079	008
26 Jul 2016	077	013

Bulletin

During the period, NOAA 2567 produced 8 C-class flares as well as one M-class event, an M2.0 flare peaking at 06:20UT. NOAA 2565 has quietly rounded the west limb. No earth-directed coronal mass ejections (CMEs) were observed.

Mostly C-class flares are expected, with still a good chance on an M-class event. The warning for a potential proton event remains in effect.

The interplanetary magnetic field was mostly directed towards the Sun (negative), except for a 3-hours positive sector starting 07:30UT. Solar wind speed varied between 350 and 440 km/s and Bz between -7 and +6 nT (mostly positive). Quiet geomagnetic conditions were observed.

Quiet to unsettled geomagnetic conditions are expected. Active episodes are possible starting late on 25 July or on 26 July, in response to the arrival of the high speed stream from the small northern positive coronal hole, as well as of the low-probability glancing blow from the 23 July CME.

Today's estimated international sunspot number (ISN): 014, based on 21 stations.

Solar indices for 23 Jul 2016

Wolf number Catania	///
10cm solar flux	086
AK Chambon La Forêt	012
AK Wingst	010
Estimated Ap	009
Estimated international sunspot number	030 - Based on 26 stations

Noticeable events summary

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

All times in UTC

<< Go to daily overview page