Viewing archive of Friday, 13 July 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Jul 13 1247 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
13 Jul 2018	072	002
14 Jul 2018	073	006
15 Jul 2018	073	011

Bulletin

During the past 24 hours no flares have been recorded. The only numbered sunspot group on the visible side of the Sun - Catania sunspot group 89 - has some potential to produce low flaring activity. The greater than 10MeV proton flux remained at background levels over the past 24 hours. No Earth directed CMEs were detected. Solar activity is expected to remain low over the next 24 hours. The maximum value of the solar wind speed, during last 24 hours, was reached at about 05:30 UT on July 13, and it amounted about 495 km/s. The solar wind speed is slowly decreasing and its present value is about 460 km/s. The interplanetary magnetic field magnitude amounts about 5 nT. Geomagnetic conditions were stable at the planetary level Kp index=1 (NOAA) and locally ranged between K index 1-3 (Dourbes) over the past 24 hours. Geomagnetic conditions are expected to be quiet today and tomorrow. Mostly unsettled geomagnetic conditions can be expected on July 15 due to the influence of the small negative polarity equatorial coronal hole, which reached central meridian earlier today (13 July).

Today's estimated international sunspot number (ISN): 007, based on 20 stations.

Solar indices for 12 Jul 2018

Wolf number Catania	000
10cm solar flux	072
AK Chambon La Forêt	018
AK Wingst	009
Estimated Ap	009
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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