Viewing archive of Friday, 20 July 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Jul 20 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
20 Jul 2018	070	010
21 Jul 2018	069	008
22 Jul 2018	069	006

Bulletin

The visible side of the Sun remains to be spotless and consequently, there is no flaring activity reported during last 24 hours. We expect such a low flaring activity to persist in the coming hours. No Earth directed CMEs were observed, and the solar protons remained at the background level.

The solar wind speed is presently about 450 km/s and the interplanetary magnetic field magnitude is about 5 nT. It is presently unclear if the small increase of the solar wind speed (up to 480 km/s was reached at 09 UT this morning), and interplanetary magnetic field (up to 7 nT), are due to a structure in the slow solar wind or a solar wind flow associated with patchy equatorial coronal hole (reached central meridian on July 16). The geomagnetic conditions are presently unsettled to quiet and we expect such a geomagnetic conditions to persist in the coming hours.

Today's estimated international sunspot number (ISN): 000, based on 24 stations.

Solar indices for 19 Jul 2018

Wolf number Catania	000
10cm solar flux	071
AK Chambon La Forêt	009
AK Wingst	006
Estimated Ap	004
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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