Viewing archive of Friday, 18 August 2017

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2017 Aug 18 1230 UTC

SIDC Forecast

Solar flares

C-class flares expected, (probability >=50%)

Geomagnetism

Active conditions expected (A>=20 or K=4)

Solar protons

Quiet

	10cm flux	Ap
18 Aug 2017	077	017
19 Aug 2017	078	010
20 Aug 2017	079	007

Bulletin

NOAA AR 2671 has reduced its complexity (now has beta-gamma magnetic configuration) and decreased in size, it has not produced any flare above the B-class level in the last 48 h. The situation can change as this region can generate C-class flares, and has potential for M-class flares.

No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar protons have remained at background levels over the past 24 hours.

The Earth is inside a high speed solar wind stream, the speed is around 600 km/s with interplanetary magnetic field intensity of 6 nT. Kp reached 5 and the local K went up to 4, on August 18. More disturbed conditions can be expected in the next 48 h.

Today's estimated international sunspot number (ISN): 042, based on 15 stations.

Solar indices for 17 Aug 2017

Wolf number Catania	///
10cm solar flux	077
AK Chambon La Forêt	044
AK Wingst	026
Estimated Ap	031
Estimated international sunspot number	040 - Based on 28 stations

Noticeable events summary

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

All times in UTC

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