The prague cluster is named for the town of Prague, Oklahoma, U.S.A. The cluster is based on a mainshock-aftershock sequence in November 2011 that was one of the early striking examples of induced seismicity in this formerly very seismically quiescent region. A dense (and well-positioned) temporary network was installed soon after the 5.6 Mw mainshock and the location calibration of this cluster is therefore exceptionally precise. Focal depths are also tightly constrained in free-depth relocations. Unfortunately only a few events are recorded at teleseismic distances so the outlier-identification process has limited power for phase observations beyond regional distance. The original calibrated cluster posted to GCCEL (prague17.8, uploaded September 20, 2018) has been updated after the occurrence of a 5.1 Mw earthquake on February 3, 2024. The update adds 59 earthquakes since the end of January 2012.
Number of events: 100
Calibration type: direct calibration using data to 1.0 degrees; hypocentroid calibration level = 0.2 km
Epicentral calibration range: 0 - 2 km
Date range: 20111105 - 20240203
Latitude range: 35.381 - 35.582
Longitude range: -97.021 - -96.573
Depth range: 3.6 - 15.0
Magnitude range: 2.0 - 5.6
