Viewing archive of Tuesday, 13 September 2016

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2016 Sep 13 1309 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
13 Sep 2016	087	006
14 Sep 2016	085	011
15 Sep 2016	083	008

Bulletin

Solar activity was low in the past 24 hours. Only one B2.7 flare was observed today (13-Sep-2016) from active region (AR 2585) which peaked at 04:44 UT. Three additional active regions are presently observed on the solar disk. Their magnetic configuration is simple and the probability to produce a flare is small. No Earth-directed CMEs were observed. Solar activity is expected to be low with a small probability of C-class flares. Solar wind parameters were at nominal values. The Solar wind speed measured by DSCOVR and ACE fluctuated around 300 km/s. The magnitude of the Interplanetary Magnetic Field (Bt) has decreased from 8 nT to 5 nT, while Bz has been mainly negative since 19:00 UT yesterday ranging between +8 nT and -5 nT. There are currently no significant coronal holes on the solar disk that may influence the Earth. In the past 24 hours, geomagnetic conditions have been quiet (K Dourbes between 1 and 3; NOAA Kp between 1 and 2). Geomagnetic activity is expected to remain the low over the next 24 hours, with a small possibility of an increase when we encounter a sector boundary crossing on 2016-Sep-14.

Today's estimated international sunspot number (ISN): 038, based on 24 stations.

Solar indices for 12 Sep 2016

Wolf number Catania	065
10cm solar flux	087
AK Chambon La Forêt	009
AK Wingst	006
Estimated Ap	006
Estimated international sunspot number	058 - Based on 35 stations

Noticeable events summary

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

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