The Caucasia cluster is named for the town of Caucasia in northern
Colombia. It covers a relatively large area, which was necessary to
obtain adequate station coverage. Many of the events are subcrustal in
depth, as deep as 190 km. There are especially large earthquakes
(maximum magnitude is 5.7) but all events are observed at teleseismic
distances. All events have depth control, from teleseismic depth phases
in many cases, but also from near-source and local-distance
observations. The location calibration is robust overall but some of the
deeper events are susceptible to instability.
