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Daily bulletin on solar and geomagnetic activity from the SIDC

Випущено: 2014 Jul 21 1232 UTC

SIDC Forecast

Сонячні спалахи

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

Geomagnetism

Quiet (A<20 and K<4)

Сонячні протони

Quiet

	10cm flux	Ap
21 Jul 2014	088	005
22 Jul 2014	089	007
23 Jul 2014	089	007

Bulletin

Solar activity has been quiet in the last 24 hours with the background X-ray flux steady around the B2 level. Only a couple of minor B flares have occurred. The largest was a B3.4 flare peaking around 8:47 UT associated with the unnumbered active region that is about to turn onto the visible solar disc from behind the East limb. There are currently only three active regions on the solar disc. NOAA AR 2018 and 2020 are stable alpha regions while the beta region 2019 does show signs of further development. No significant CME's were reported. Quiet conditions are expected to continue with only a slight chance on flaring at C level. The all quiet alert is presently maintained but this may need to be revised if NOAA AR 2019 continues to grow and depending on the nature of the active region(s) that are turning onto the disc from behind the East limb. Solar wind speed remained at low levels around the 280 km/s, while the interplanetary magnetic field increased to around the 6 nT level with Bz varying and currently reaching levels of around -4nT. Geomagnetic conditions were quiet with local K Dourbes and NOAA Kp in the 0-2 range. Quiet conditions are expected to continue although some influence of a coronal hole high speed stream can possibly cause enhanced solar wind conditions and associated unsettled geomagnetic conditions in the next 24 to 48 hours.

Today's estimated international sunspot number (ISN): 013, based on 18 stations.

Solar indices for 20 Jul 2014

Wolf number Catania	///
10cm solar flux	087
AK Chambon La Forêt	006
AK Wingst	003
Estimated Ap	002
Estimated international sunspot number	028 - Based on 20 stations

Noticeable events summary

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

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