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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2013 Jun 19 1237 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

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

Protoni solari

Quiet

	10cm flux	Ap
19 Jun 2013	130	003
20 Jun 2013	132	003
21 Jun 2013	135	014

Bulletin

A new sunspot group, Catania 9 (NOAA AR 1776) emerged at 15N near the central meridian. It is active in the C-level. An C8.4 flare was monitored on June 19, 9:54UT peak time. The source region is however still behind the east limb. SDO/AIA 193 offers a nice view on the source region. On June 18, we see stretched loops high in the corona that break open, the eruption is followed by post flare loops that seem to be captivated in a bulb structure. CACTus reported 2 coronal mass ejections from that region. We keep an eye on it. The geomagnetic conditions are quiet: the solar wind speed is around 300 km/s and the total magnetic field around 5nT. Active conditions are possible from June 21 if the fast solar wind from the northern coronal hole reaches the Earth.

Today's estimated international sunspot number (ISN): 082, based on 21 stations.

Solar indices for 18 Jun 2013

Wolf number Catania	118
10cm solar flux	125
AK Chambon La Forêt	008
AK Wingst	004
Estimated Ap	004
Estimated international sunspot number	076 - Based on 22 stations

Noticeable events summary

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

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