Viewing archive of Wednesday, 25 November 2015

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2015 Nov 25 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
25 Nov 2015	115	018
26 Nov 2015	117	021
27 Nov 2015	119	015

Bulletin

In the past 24 hours, beta region NOAA AR 2454 produced one C1.9 flare which peaked around 8:26 UT on November 25. C flares are expected within the next 24 hours, with a 10% chance for an M flare. STEREO COR2 A first observed a bright CME in its East to Southeast direction at 8:54 UT on November 25. LASCO data are not yet available. This CME is most probably associated with the C1.9 flare of 8:26 UT. Awaiting LASCO imagery, and in view of the location of the flare near the West limb, this CME is not expected to be Earthbound. The Earth is currently within a slow solar wind region regime. Solar wind speed varied between 260 and 360 km/s in the past 24 hours, while the magnitude of the Interplanetary Magnetic Field ranged between 2 and 5 nT. Over the past 24 hours, geomagnetic conditions have been quiet (K Dourbes between 0 and 2; NOAA Kp between 0 and 1). The expected arrival of a coronal hole high speed stream may cause active (K Dourbes = 4) geomagnetic levels on November 25, 26 and 27, with a slight chance for minor storm intervals (K Dourbes = 5).

Today's estimated international sunspot number (ISN): 060, based on 10 stations.

Solar indices for 24 Nov 2015

Wolf number Catania	///
10cm solar flux	113
AK Chambon La Forêt	002
AK Wingst	000
Estimated Ap	001
Estimated international sunspot number	062 - Based on 16 stations

Noticeable events summary

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

All times in UTC

<< Go to daily overview page