Viewing archive of Sunday, 6 December 2015

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2015 Dec 06 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Active conditions expected (A>=20 or K=4)

Solar protons

Quiet

	10cm flux	Ap
06 Dec 2015	102	019
07 Dec 2015	103	021
08 Dec 2015	104	019

Bulletin

Solar activity has been low over the past 24 hours. The largest recorded flares were two C1.9 class flares. NOAA Active Region (AR) 2463 (Dao Beta) has been most active, producing one of the C1.9 flares, peaking at 15:21 UT yesterday. AR 2463 has shown small amounts of flux emergence and is expected to continue to produce low-level activity. AR 2464 (Axx Alpha) rotated into view over the East limb and produced the other C1.9 class flare, peaking at 16:23 UT. No Earth directed CMEs have been observed in the past 24 hours. Solar activity is expected to be low. The solar wind speed has been slowly increasing from around 400 km /s to around 500 km/s over the past 24 hours. The total magnetic field strength has fluctuated around 10 nT, and the Bz component has been largely negative, fluctuating between 0 and -10 nT. Geomagnetic conditions ranged between quiet and active (NOAA Kp 3-4, local K Dourbes 1-4). Conditions are expected to fluctuate between unsettled and active over the next couple of days due to a large positive polar coronal hole (CH), with a section extending to low latitudes. The leading Co-rotating Interaction Region (CIR) has probably been the source of increased activity over the past 12 hours, and the following High Speed Stream (HSS) will continue to enhance conditions in the next couple of days.

Today's estimated international sunspot number (ISN): 048, based on 12 stations.

Solar indices for 05 Dec 2015

Wolf number Catania	///
10cm solar flux	101
AK Chambon La Forêt	029
AK Wingst	020
Estimated Ap	019
Estimated international sunspot number	046 - Based on 13 stations

Noticeable events summary

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

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