Viewing archive of Tuesday, 11 July 2017

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2017 Jul 11 1239 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
11 Jul 2017	095	012
12 Jul 2017	095	011
13 Jul 2017	093	008

Bulletin

NOAA AR 2665 (the only visible AR on the disk) produced multiple B class flares. This region continues to grow, C-class flares can be expected (and less likely M-flares). No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar protons have remained at background levels over the past 24 hours. Solar wind parameters reflected the continued influence of a high speed stream coming from the positive polarity coronal hole. Solar wind speed steadily increased from about 550 km/s to 670 km/s ( at 07:30 UT), later solar wind speed slightly decreased till 630 km/s. Total magnetic field abruptly decreased from about 8 to 4 nT today (04:30 UT), simultaneously variations of Bz component decreased from +7/+4 nT till +/-2 nT. Geomagnetic conditions ranged between Kp index 1-3 (NOAA) and local K index 1-4 (Dourbes) over the past 24 hours. Geomagnetic conditions are expected to be quiet to unsettled for the next few days.

Today's estimated international sunspot number (ISN): 041, based on 17 stations.

Solar indices for 10 Jul 2017

Wolf number Catania	034
10cm solar flux	095
AK Chambon La Forêt	012
AK Wingst	008
Estimated Ap	009
Estimated international sunspot number	045 - Based on 37 stations

Noticeable events summary

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

All times in UTC

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