Viewing archive of Friday, 30 September 2016

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2016 Sep 30 1235 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

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

Solar protons

Quiet

	10cm flux	Ap
30 Sep 2016	083	028
01 Oct 2016	079	011
02 Oct 2016	075	010

Bulletin

There were no C-class flares reported during last 24 hours. The only active region observed on the visible side of the Sun during last three days, NOAA AR 2597, is now rotating across the west solar limb. Therefore, the probability for the C-class flares to occur in the coming hours is very low (about 10 percent). No Earth directed CMEs were observed in the last 24 hours. The Earth is still inside the fast solar wind with the speed of about 650 km/s. The interplanetary magnetic field magnitude is about 5 nT, and the Bz component of the interplanetary magnetic field is fluctuating with values down to -5 nT. Due to the long interval of the negative value of the Bz and the fast solar wind, disturbed geomagnetic conditions were induced in the evening of September 29 (around 18 UT) and the local station at Dourbes reported K=5, and NOAA reported Kp=5. We expect active to minor storm geomagnetic conditions in the coming hours.

Today's estimated international sunspot number (ISN): 000, based on 23 stations.

Solar indices for 29 Sep 2016

Wolf number Catania	///
10cm solar flux	083
AK Chambon La Forêt	///
AK Wingst	031
Estimated Ap	031
Estimated international sunspot number	017 - Based on 25 stations

Noticeable events summary

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

All times in UTC

<< Go to daily overview page