Viewing archive of Sunday, 12 July 2015

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2015 Jul 12 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
12 Jul 2015	115	015
13 Jul 2015	112	009
14 Jul 2015	110	006

Bulletin

NOAA 2385 (Catania 11) produced the only flare of the period: a C1 flare peaking at 18:36UT. The other sunspot regions were quiet. Old active region NOAA 2371 is making its reappearance from behind the east limb. No obvious Earth-directed coronal mass ejections (CME) were observed.

There remains a chance on an isolated C-class flare.

Solar wind speed is gradually declining and currently varying between 570-600 km/s. Bz oscillated between -8 and +7 nT. The interplanetary magnetic field was mostly directed away from the Sun. Quiet to active geomagnetic conditions were observed.

Quiet geomagnetic conditions are expected with a chance on an active episode, as the influence of the high speed stream of the coronal hole is gradually subsiding.

Today's estimated international sunspot number (ISN): 081, based on 11 stations.

Solar indices for 11 Jul 2015

Wolf number Catania	///
10cm solar flux	120
AK Chambon La Forêt	///
AK Wingst	024
Estimated Ap	027
Estimated international sunspot number	094 - Based on 27 stations

Noticeable events summary

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

All times in UTC

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