North Italy M6.1 (2012/5/20)

Fig.1 : UTC was used and data from USGS. The parameters of major earthquakes (M>=5) were shown. The tectonic line was suspected, as most events located near the boundary between plane and moutain region.
The event located in the middle Italy is the L'Aquila earthquake.


Fig. 2: Epicenter distribution before this event occurrence


Fig.3 : These events were sellected in the tetragon in the map.


Fig. 4 : The time-space distribution of these events along AB line in fig.3.