Viewing archive of Friday, 8 July 2016

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2016 Jul 08 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Minor storm expected (A>=30 or K=5)

Solar protons

Quiet

	10cm flux	Ap
08 Jul 2016	090	028
09 Jul 2016	095	010
10 Jul 2016	100	010

Bulletin

Three new active regions turned to the front side of the solar disk. Catania number 6 (no NOAA number yet), located near N10E90, did produce a C2.7 flare, peaking at 0:56 UT. The other regions Catania number 4 and 5 (NOAA AR 2562) did not create any flaring. Flaring activity at the C-level is expected, especially from Catania number 6, which produced several flares while being on the backside. No Earth-directed CMEs were observed.

Solar wind observations of ACE do indicate the arrival of a high speed stream (HSS) emanating from the positive polarity elongated coronal hole (currently stretching N0W60 to N40W10). The solar wind speed has obtained values above 600 km/s, while the magnetic field magnitude peaked at above 15 nT, with a fluctuating north-south component. Geomagnetic conditions reached active levels (K=4, locally at Dourbes, and globally for Kp at Potzdam) and even storm levels (K=5, NOAA estimated global Kp). Geomagnetic disturbances are expected at active to storm levels for at least the next 24 hours, before returning to quiet levels. In addition, another large coronal hole (closely following the prior one) is about to cross the central meridian, increasing chances for more activity within about 3 days.

Today's estimated international sunspot number (ISN): 040, based on 17 stations.

Solar indices for 07 Jul 2016

Wolf number Catania	053
10cm solar flux	083
AK Chambon La Forêt	034
AK Wingst	026
Estimated Ap	026
Estimated international sunspot number	026 - Based on 32 stations

Noticeable events summary

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

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