Viewing archive of Thursday, 31 October 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 Oct 31 1249 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Minor storm expected (A>=30 or K=5)

Solar protons

Quiet

	10cm flux	Ap
31 Oct 2013	130	015
01 Nov 2013	125	024
02 Nov 2013	120	003

Bulletin

There was only one C flare on the Sun during the past 24 hours, originating from Catania sunspot region 29 (NOAA active region 11884). The X-ray background level has been reduced to the B-level. For the next 48 hours, M flares are expected. No Earth directed CMEs were observed. The proton flux measured by GOES is currently decreasing. Solar wind speed reached a maximum of 400 km/s as observed by ACE. The magnitude of the interplanetary magnetic field (IMF) increased from 6 to 12 nT, mainly with a positive Bz component. Geomagnetic activity is quiet to unsettled (local K at Dourbes and NOAA Kp between 0 and 3). Unsettled to minor storm conditions (K= 3 to 5) are possible within the next 48 hours, due to weak effects of the CMEs that erupted on October 28.

Today's estimated international sunspot number (ISN): 089, based on 16 stations.

Solar indices for 30 Oct 2013

Wolf number Catania	///
10cm solar flux	142
AK Chambon La Forêt	024
AK Wingst	015
Estimated Ap	016
Estimated international sunspot number	104 - Based on 25 stations

Noticeable events summary

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

All times in UTC

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