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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2015 Jun 10 1231 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

	10cm flux	Ap
10 Jun 2015	135	011
11 Jun 2015	140	006
12 Jun 2015	145	010

Bulletin

Six regions are visible at the frontside of the solar disk. Five C-class flares were observed in the past 24 hours, occuring in Catania sunspot regions 84, 79, 85 and 83 (NOAA active regions 2364, 2360, 2365, 2366 respectively) and a new region that is currently at the East limb (S20). The most interesting event was a C2.8 flare (peaking at 20:06 UT on June 9), following the eruption of a small filament at the location of Catania 84. A coronal dimming was visible as well in SDO/AIA images. An associated partial halo CME was detected by SOHO/LASCO. It first appeared in the LASCO C2 field of view at 20:24 UT and had an apparent angular width of around 180 degrees. The CME has components travelling (mainly to the East) with a projected speed around 1000 km/s. The arrival of a glancing blow at Earth is possible with an estimated arrival time of 0:00 UT on June 12.

Earth still experiences the influence of a negative polarity high speed stream. The solar wind speed is mostly around 600 km/s and the interplanetary magnetic field magnitude obtains average values around 5 nT. Quiet to unsettled (K= 1 to 3) geomagnetic conditions are obtained, both at local (K Dourbes) and global (NOAA estimated Kp) level. Quiet to unsettled conditions are expected, till the potential arrival of the June 9 CME enhances the activity.

Today's estimated international sunspot number (ISN): 078, based on 19 stations.

Solar indices for 09 Jun 2015

Wolf number Catania	///
10cm solar flux	137
AK Chambon La Forêt	020
AK Wingst	016
Estimated Ap	016
Estimated international sunspot number	074 - Based on 25 stations

Noticeable events summary

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

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