Figure 10
From: Study of Pc1 pearl structures observed at multi-point ground stations in Russia, Japan, and Canada
Simple model calculations for comparison between a distributed source and a point source. Location of stations and source region: (a) A distributed source region (model 1) and (d) a point source region (model 2). The D component waveforms of the source waves with frequencies of 0.6 to 1.0 Hz: distance from the source region to stations at (b) 2,000 and (c) 4,000 km for model 1 and (e) 2,000 and (f) 4,000 km for model 2. Colors indicate angles of stations from the south.