Viewing archive of Wednesday, 18 June 2014

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2014 Jun 18 1245 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
18 Jun 2014	112	011
19 Jun 2014	112	005
20 Jun 2014	115	005

Bulletin

NOAA ARs 2087 and 2089 have beta-gamma configuration of their photospheric magnetic field. The strongest flare of the past 24 hours was the C4.0 flare peaking at 03:31 UT today in the NOAA AR 2087. The flare was associated with coronal dimmings and a post-eruptive arcade observed by SDO/AIA, and also probably with a narrow CME first seen in the SOHO/LASCO C2 field of view at 07:48 UT. The CME is not expected to arrive at the Earth. We expect further flaring activity on the C-level, in particular from NOAA ARs 2087 and 2093, with an M-class flare being possible but not very likely. An interplanetary sector boundary was crossed around 17:00 UT yesterday. The interplanetary magnetic field (IMF) magnitude increased up to 10 nT, but it did not exhibit prolonged intervals of strongly negative north-south component Bz. The geomagnetic conditions were quiet to unsettled. The Earth is currently inside a slow (around 400 km/s) solar wind flow with slightly elevated (around 6 nT) IMF magnitude. The geomagnetic conditions are quiet and are expected to remain so.

Today's estimated international sunspot number (ISN): 085, based on 14 stations.

Solar indices for 17 Jun 2014

Wolf number Catania	///
10cm solar flux	114
AK Chambon La Forêt	///
AK Wingst	012
Estimated Ap	010
Estimated international sunspot number	067 - Based on 16 stations

Noticeable events summary

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

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