Just before Christmas last year we published a paper in Scientific Reports entitled “Spatial and temporal multiplet analysis for identification of dominant fluid migration path at The Geysers geothermal field, California” on our observations of repeating earthquakes observed in induced seismicity at The Geysers geothermal field.
Reference:
Staszek, M., Ł. Rudziński, and G. Kwiatek (2021). Spatial and temporal multiplet analysis for identification of dominant fluid migration path at The Geysers geothermal field, California. Scientific Reports 11, 23908, doi 10.1038/s41598-021-03267-y