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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2014 May 11 1233 UTC

SIDC Forecast

Valid from 1230 UTC, 11 May 2014 until 13 May 2014
Brillamenti solari

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

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

10cm fluxAp
11 May 2014154018
12 May 2014156015
13 May 2014158007

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 flux152
AK Chambon La Forêt021
AK Wingst012
Estimated Ap010
Estimated international sunspot number090 - Based on 13 stations

Noticeable events summary

DayBeginMaxFineLocStrengthOP10cmCatania/NOAARadio burst types
Nessuna

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

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