Viewing archive of Monday, 9 November 2015

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2015 Nov 09 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

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

Solar protons

Quiet

	10cm flux	Ap
09 Nov 2015	108	022
10 Nov 2015	107	012
11 Nov 2015	108	024

Bulletin

Over the past 24 hours there was no significant flaring activity recorded. However, most small-scale activity appears to be occurring around NOAA Active Regions (AR) 2449 (Dao-Beta) and 2450 (Bxo-Beta) which have a complex magnetic topology. Previously active AR 2443 has moved over the Western hemisphere limb. ARs 2448 and 2451 (located near disk center) appear stable, with small amounts of flux emergence. Flaring is expected to continue at the B-class level with a reasonable possibility of C-class flares and small possibility of an M-class flare. No significant filaments are visible. No significant eruptions were observed, and no Earth directed Coronal Mass Ejections (CME) were recorded. The solar wind speed has remained largely stable over the past 24 hours, around 500 km /s. The total magnetic field has slightly decreased from around 10 nT to 7 nT, and the Bz component has been largely negative. The Bz has been mainly around -5nT over the past 24 hours. Geomagnetic conditions ranged between quiet and active over the past 24 hours (NOAA Kp 1-4, local K Dourbes 2-4). With NOAA Kp remaining at Kp 4 levels throughout the morning (2015-Nov-09). A large (positive) coronal hole is currently centered at N30W30 and is probably the source of the slightly enhanced solar wind speeds and negative Bz. A small co-rotating interaction region (CIR) is believed to have preceded the coronal hole high speed stream. As this region rotates further into the Western hemisphere it will maintain increased solar wind speeds, as a consequence Solar wind conditions are expected to remain enhanced. Geomagnetic conditions are expected to vary between quiet and active.

Today's estimated international sunspot number (ISN): 063, based on 15 stations.

Solar indices for 08 Nov 2015

Wolf number Catania	///
10cm solar flux	108
AK Chambon La Forêt	031
AK Wingst	019
Estimated Ap	018
Estimated international sunspot number	074 - Based on 22 stations

Noticeable events summary

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

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