Viewing archive of Tuesday, 27 September 2016

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2016 Sep 27 1231 UTC

SIDC Forecast

Solar flares

Quiet conditions (<50% probability of C-class flares)

Geomagnetism

Major magstorm expected (A>=50 or K>=6)

Solar protons

Quiet

	10cm flux	Ap
27 Sep 2016	087	043
28 Sep 2016	085	057
29 Sep 2016	085	016

Bulletin

Solar activity remains to be low with only one isolate C-class flare reported. The C1.0 flare (peaked at 07:48 UT today) originated from the NOAA AR 2597 which presently has beta-gamma configuration of its photospheric magnetic field. We expect solar activity to be low with chances for an isolated C-class flare. No Earth directed CMEs were observed in the last 24 hours. The Earth is presently inside the solar wind with the speed of about 550 km/s. The interplanetary magnetic field magnitude is about 10 nT. Due to long intervals of negative values of the Bz component of the magnetic field (down to -10 nT) active to storm conditions prevailed during last 12 hours. The present solar wind flow apparently constitutes the edge of the fast stream associated with the large coronal hole in the northern hemisphere. The fast solar wind from its equatorial extension is expected to arrive at the Earth late today or early tomorrow. Up to moderate storm conditions can be expected (K=6).

Today's estimated international sunspot number (ISN): 024, based on 24 stations.

Solar indices for 26 Sep 2016

Wolf number Catania	///
10cm solar flux	087
AK Chambon La Forêt	046
AK Wingst	026
Estimated Ap	028
Estimated international sunspot number	027 - Based on 23 stations

Noticeable events summary

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

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