Viewing archive of Friday, 8 April 2016

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2016 Apr 08 1246 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
08 Apr 2016	093	004
09 Apr 2016	091	007
10 Apr 2016	090	008

Bulletin

Over the past 24 hours solar activity has been low. The largest flare was a B7.7 class flare, produced by Active Region (AR) 2529 (Macintosh class:Hkx; Mag. Type:Alpha), which peaked yesterday at 13:37 UT. This AR 2528 is currently the only significant region on disk with evidence of small amounts of flux cancellation in HMI magnetogram observations. Another AR 2528 (Macintosh class:Cao; Mag. Type:Beta), is moving onto the West limb. A Coronal Mass Ejection(CME) detected yesterday at 08:36 UT originated at the West Limb has some probability to hit the Earth in approximately 3 days time. The initial median speed of CME is 450 km/s, which is higher than the background median solar wind speed 400 km/s. Solar protons have remained at background levels over the past 24 hours. Solar activity is expected to remain low over the next 24 hours with a low probability of C-class flares. The solar wind parameters have been affected by the sector boundary crossing from 17:30 UT 07-Apr-16 till 04:00 UT today. The total magnetic field strength in solar wind has increased till 14 nT, while Bz component of the magnetic field decreased till -14 nT simultaneously with the transition of the Phi angle. The solar wind speed however remained stable varying around 400 km/s over the past 24 hours. As the consequence a minor magnetic storm has occurred detected at 24:00 UT today, which lasted approximately till 08:00 UT today. Geomagnetic indexes as detected this morning (Kp index = 5 (NOAA), local K index = 6 (Dourbes) at and Dst Kioto = 72 nT) are returning to the quiet unperturbed conditions now ( Kp = 1, K = 2, Dst = 45 nT). Quiet conditions are expected next 2 days. However enhanced solar wind conditions are again possible starting from 11-04-16 due to CME detected yesterday at the West limb of the Sun.

Today's estimated international sunspot number (ISN): 027, based on 11 stations.

Solar indices for 07 Apr 2016

Wolf number Catania	///
10cm solar flux	092
AK Chambon La Forêt	039
AK Wingst	022
Estimated Ap	020
Estimated international sunspot number	018 - Based on 21 stations

Noticeable events summary

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

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