Viewing archive of Friday, 18 January 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 Jan 18 1146 UTC

SIDC Forecast

Solar flares

Quiet conditions (<50% probability of C-class flares)

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
18 Jan 2013	120	007
19 Jan 2013	119	007
20 Jan 2013	115	016

Bulletin

Solar activity has been quiet with only two small C flares with the largest one a C2.5 flare originating from NOAA 1652. Solar activity is expected to remain quiet with possibly an isolated C flare. Geomagnetic activity reached storm level on January 17th between 15:00 UT and 18:00 UT. Ace IMF data of this period shows a jump of the magnetic field strength from 5 nT to 15 nT with a negative Bz component. There was no shock detected in the ACE solar wind data. This geomagnetic activity is likely related to the slow CME of Sunday January 13th 13:00 UT (as seen in LASCO C2). Geomagnetic activity is possible to rise in the night of January 19th- 20th due to the CME of January 16th 19:12 UT (as seen in LASCO C2).

Today's estimated international sunspot number (ISN): 028, based on 03 stations.

Solar indices for 17 Jan 2013

Wolf number Catania	///
10cm solar flux	123
AK Chambon La Forêt	026
AK Wingst	016
Estimated Ap	017
Estimated international sunspot number	042 - Based on 10 stations

Noticeable events summary

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

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