MBK Team Aurora
MBK Team home
METEORS
COMETS
ECLIPSES
SUN / AURORA

Aurora in Slovenia

August 5, 2011

This was the first auroral display of Solar cycle 24 visible from Slovenia. On 2011 August 4 at 03:57 UTC active region 11263 produced an M9.3 flare followed by a fast full-halo CME (1950 km/s). The CME impacted the Earth late on 2011 August 5 with peak solar wind speed around 620 km/s and Bz -20 nT. The impact triggered a G4-class geomagnetic storm with maximum Dst -117 nT (-86 nT at the beginning of observations). Peak planetary A index was 50. The geomagnetic storm produced low auroral activity visible from Slovenia.

If you also observed the aurora borealis (aka northern lights) from Slovenia, please send a report by e-mail!


Photographs from Ribniska koca, Slovenia (N46.50, E15.26)
by Javor Kac using 17-mm f/2.8 lens and Canon 40D set to ISO 800

22:00 UT .. 59 s

22:02 UT .. 59 s

22:07 UT .. 59 s

22:14 UT .. 59 s

22:28 UT .. 59 s

22:59 UT .. 59 s

23:17 UT .. 59 s

01:18 UT .. 59 s

01:39 UT .. 59 s

01:50 UT .. 59 s


Individual reports
Location: Ribniska koca (46.50N, 15.26E) 
UTC Time and Date: 05.08.2011 - 21:52 (3 hours)
Observer: Javor Kac
Limiting magnitude: +6.5
Light pollution: low
Cloudiness: 20%
Limiting magnitude at the location of aurora: ca +6
Auroral activity: very low
Elevation of activity: 25 degrees
Types of activity:
(diffuse glow)
Comments: Aurora first detected photographically through clouds at 21:52 UT. Visually observed from 22:07 UT to 22:30 UT as faint reddish diffuse glow up to 20 degrees high and spanning 40 degrees in azimuth.
Location: Ribniska koca (46.50N, 15.26E) UTC Time and Date: 05.08.2011 - Observer: Jure Atanackov Limiting magnitude: +6.9 Light pollution: very low Cloudiness: 20% Limiting magnitude at the location of aurora: +6.5 Auroral activity: very low Elevation of activity: 30 degrees Types of activity:
(diffuse glow)
Comments: Aurora first detected photographically. Visible as faint white to reddish glow up to 30 degrees high. Clouds low on the N horizon, up to 25 degrees high obscured the lower part of auroral activity.

The text on this page is © 2011 by MBK Team.

Back to
MBK Team homepage



MBK Team's Auroramon

Hourly STD DMSP/POLAR Auroral Activity Report

Solar Terrestial Activity Report

Today's Space Weather

Spaceweather

NOAA POES Auroral Activity

SEC Online Data