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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2017 Aug 20 1230 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

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

Protoni solari

Quiet

	10cm flux	Ap
20 Aug 2017	087	024
21 Aug 2017	090	007
22 Aug 2017	094	007

Bulletin

NOAA AR 2671 continued producing C-class flares, whereas the region rotating into view produced an M1.1 flare peaking at 01:52 UT. More M-class flaring (and possibly X) can be expected.

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 still inside a high speed solar wind stream, the speed is around 700 km/s with interplanetary magnetic field intensity of 4 nT. As a consequence, Kp reached 5 and the local K went up to 4. More disturbed conditions can be expected in the next 24 h.

Today's estimated international sunspot number (ISN): 059, based on 18 stations.

Solar indices for 19 Aug 2017

Wolf number Catania	///
10cm solar flux	087
AK Chambon La Forêt	051
AK Wingst	031
Estimated Ap	034
Estimated international sunspot number	050 - Based on 28 stations

Noticeable events summary

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

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