Viewing archive of Sunday, 5 July 2015

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2015 Jul 05 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
05 Jul 2015	118	038
06 Jul 2015	119	022
07 Jul 2015	118	013

Bulletin

Solar activity has remained quiet over the past 24 hours with no significant flares. AR 2381 has produced the largest flare, a B7.4 class flare, peaking at 09:15 UT on 2015-Jul-05. There are some flows / small eruptions emerging from beyond the north-east solar limb, and when the source region rotates into view we may see an increase in activity. The proton numbers have continued to be low and have not exceeded 1 pfu at the Earth in the past 24 hours. The solar wind speed increased from approx. 320 km / s to 500 km / s over the past 24 hours, peaking at approx. 600 km / s at 20:00 UT on 2015-Jul-04. The total magnetic field has fluctuated and reached approx. 20 nT at 18:00 UT on 2015-Jul-04 and has subsequently declined to around 10 nT. The Bz reached approx. -20 nT at 20:00 UT. These solar wind conditions caused an ongoing geomagnetic storm, Kp (NOAA) reached 6 in the period from 18:00 to 6:00 UT and has subsequently dropped to 5, the local K (Dourbes) is currently at 4. Enhanced geomagnetic storm conditions are expected to continue for a couple of days due to the presence of a coronal hole in the south west generating a high speed stream.

Today's estimated international sunspot number (ISN): 120, based on 19 stations.

Solar indices for 04 Jul 2015

Wolf number Catania	///
10cm solar flux	117
AK Chambon La Forêt	037
AK Wingst	///
Estimated Ap	019
Estimated international sunspot number	105 - 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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