Fig. 4.
From: ‘Negative repeating doublets’ in an aftershock sequence
The 2,631 aftershocks selected (top, in black), and the 230 ‘repeating events’ identified (middle) by the WCH station, with vertical lines showing the magnitude of the events. Horizontal lines (bottom), linking the two ‘repeating events’, show the ‘repeating pairs’. Regular ‘repeating doublets’ are shown in blue, while ‘negative repeating doublets’ are shown in red.