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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2014 May 11 1233 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

	10cm flux	Ap
11 May 2014	154	018
12 May 2014	156	015
13 May 2014	158	007

Bulletin

A handful of C flares have occurred over the last 24 hours originating from the Catania groups 42, 43, 47 (NOAA AR 2055, 2056, 2058 respectively) in the eastern hemisphere. The strongest one from Catania group 47 (NOAA AR 2058) peaking at 4:43 at C6.4 level. Some C level flaring activity is expected to continue with chances for M level flares. Between about 2 UT and 5 UT solar wind speed has increased from around 360 km/s to around 410 km/s. It has meanwhile fluctuated in the 380 km/s to 440 km/s range. Total magnetic field has increased over the period with maxima around 8.5 nT, but is presently slightly lower again around 7.5nT. Bz has been variable in the -7.8nT to +7.8nT range. These increased solar wind parameters are expected to persist for a further day under the influence of a coronal hole high speed stream. Geomagnetic conditions have been mostly unsettled but have reached active levels after midnight (both local K Dourbes and NOAA Kp reached 4). Geomagnetic conditions are expected to remain unsettled with possible active periods under the influence of the high speed stream.

Today's estimated international sunspot number (ISN): 096, based on 08 stations.

Solar indices for 10 May 2014

Wolf number Catania	///
10cm solar flux	152
AK Chambon La Forêt	021
AK Wingst	012
Estimated Ap	010
Estimated international sunspot number	090 - Based on 13 stations

Noticeable events summary

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

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