Viewing archive of Tuesday, 23 February 2016

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2016 Feb 23 1252 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
23 Feb 2016	094	006
24 Feb 2016	094	013
25 Feb 2016	096	010

Bulletin

Solar activity was very low. The largest flare of the period were a B9.7 flare from around the East limb peaking at 01:09UT and a B5. The most prominent region NOAA AR 2505 showed signs of decay. Solar activity is expected to be quiet with a possibility for an isolated C flare. No Earth directed CMEs were recorded in coronagaph data. Earth was in slow solar wind conditions with velocity in the 340-390 km/s range and total magnetic field dropping back to nominal levels of 3-5 nT. The magnetic field Bz was variable and the phi angle mainly in the negative sector. Geomagnetic conditions were quiet (local K Dourbes and NOAA Kp between 0 and 2). Nominal solar wind conditions with associated quiet geomagnetic conditions are expected to continue. The possible influence of a weak high speed stream from the extensions of the Northern polar coronal hole may, from tomorrow onwards, slightly increase solar wind conditions leading to quiet to unsettled geomagnetic conditions.

Today's estimated international sunspot number (ISN): 038, based on 17 stations.

Solar indices for 22 Feb 2016

Wolf number Catania	///
10cm solar flux	094
AK Chambon La Forêt	006
AK Wingst	002
Estimated Ap	002
Estimated international sunspot number	034 - Based on 21 stations

Noticeable events summary

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

All times in UTC

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