Repeated Burst Repeating Earthquakes in North Chile. From long waiting times for short bursts.

Repeating earthquakes are pairs or families of events that rupture an identical patch of a fault repeatedly, having recurrence times from days to several years. 
They are to be distinguished from quasi-repeaters whose source areas are non or only partly overlapping. 
We report on a particular quasi-repeater phenomenon:  repeated burst repeaters, which we call raspberry repeaters. In contrast to regular repeater series, each rupture phase consists of multiple events (the burst) rather than just one event. 
In a burst phase, multiple events occur in a cascade over a short time period followed by a notably longer waiting time. In our case the waiting time between bursts range from weeks to years, while the activity during a burst is usually smaller than six hours. We identified over 20 of such raspberry repeater series in northern Chile. 
For multiple series we relocate the events and analyze their source properties as well as their inter-event interactions in detail. We find that they neither obey a classical mainshock-aftershock pattern, nor the diffuse pattern of earthquake swarms. Interestingly, several groups show remarkably consistent repeating pattern, i.e., their sub-cluster rupture order remains similar. 
The identification and description of raspberry repeater series can improve our understanding of subduction related failure and earthquake generation mechanisms, of stress transfer and triggering processes between earthquakes.