Opera 2015 - Magnetic Pulsation 006

2015-03-05 night time from 00:02 to 03:00 UTC, PC1

Geomagnetic activity as reported by NOAA (http://www.swpc.noaa.gov/products/notifications-timeline)

PC1 detected by IRF of Kiruna (http://www.irf.se/maggraphs/puls.php).

The white box contains the entire all-night pulse , in red box (pointed as detail) the one received from Cumiana observatory.

Source file:

2015-03-05 00:00 to 04:00 at OpenLab st. 01 - Cumiana (TO), N Italy
Stereo file acquired with two orthogonal induction coils: NS on left channel, EW on right one.

Station 01 - IK1QFK  CUMIANA (TO), NW Italy

RDF reception: colors indicate the
signals coming direction. PC pulsation is indicated in white box and is basically composed by  east-west components. The top of the spectrogram identifies the various types of present noise.

Station 01 - IK1QFK  CUMIANA (TO), NW Italy

Here the two channels are analyzed in separate way, with sonic visualizer. In NS directions interferences are very high: they are caused by an Ethernet Power Adapter used by a neighbor, located 100 meters away. This gives an indication of how delicate the choice of "where to place" an induction coil can be. Noise apart, this pulsation has components only in
East-West direction. This belies, as already happened before, that the geomagnetic pulsations are best received orienting the coil for receiving signals in a north-south direction, because of their polar origin.
The pulsations can occur with signals oriented in all directions, as they are generated at relatively close distances compared to the wave length,  and we are therefore in the reactive area. By years of experience in these receptions we realized that usually the best
coil position for Geomagnetic Pulsations and Schumann resonances reception is the East-West (then with the axis pointing north-south).

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