The San Juan cluster is named for San Juan Province in Argentina. There is no dominant event or sequence, just a collection of 48 small and moderate-sized events over the period 1978-2013. Even though they are not observed at far-regional or teleseismic distances, the smaller events are retained in order to provide a solid framework for depth control, velocity structure and good azimuthal coverage for the hypocentroid.
Number of events: 79
Calibration type: direct calibration using data to 1.0 degrees; hypocentroid calibration level = 0.8 km
Epicentral calibration range: 1 - 5 km
Date range: 19780124 - 20210119
Latitude range: -32.128 - -31.124
Longitude range: -69.199 - -68.052
Depth range: 4.0 - 39.0
Magnitude range: 2.0 - 6.2
