@inproceedings{epos1971,
       booktitle = {35th General Assembly of the European Seismological Commission},
           month = {September},
           title = {Preliminary results for Space-Time Clustering of Seismicity and its
Connection to Stimulation Processes, in North-Western Geysers
Geothermal Field},
          author = {Konstantinos Michail Leptokaropoulos and Monika Staszek and Stanislaw Lasocki and Grzegorz Kwiatek},
            year = {2016},
             url = {https://episodesplatform.eu/eprints/1971/},
        abstract = {The Geysers geothermal ?eld located in California, USA, is the largest geothermal site in the world, operating
since the 1960?s. Although maximum production took place in the mid 1980?s the ?eld is still operating nowadays
and a dense local seismic network deployed in 2003 provides a high quality seismicity data. We here utilize
the data associated with 2 injection wells (prati-9 and prati-29) which covers a time period of approximately
7 years (from November 2007 to August 2014). Our analysis comprises two different methods. In the ?rst
one, multi-dimensional clustering is attempted after transforming selected catalog parameters (e.g. hypocentral
coordinates, distance of events from the injection point) into equivalent dimensions, by applying the methodology
proposed by Lasocki (2014). Then, we identify clusters as hierarchically closed neighbors in multi-dimensional
space. In addition, correlation between spatio-temporal seismicity evolution and variation of the injection/
production data will be performed and quanti?ed by elaboration of time-series through speci?ed statistical tools
(cross correlation, binomial test to investigate signi?cant rate changes, b-value variation). Preliminary results are
expected to facilitate the proper parameterization of the methods applied in order to reveal the role of the physical
processes that control seismogenesis in geothermal sites.

References:
Lasocki, S. (2014), Transformation to equivalent dimensions ? a new methodology to study earthquake clustering,
Geophys. J. Int., 197, 1224-1235.

Acknowledgements:
This work was supported within SHEER: "Shale Gas Exploration and Exploitation Induced Risks" project funded
from Horizon 2020 ? R\&I Framework Programme, call H2020-LCE-2014-1 and within statutory activities
No3841/E-41/S/2016 of Ministry of Science and Higher Education of Poland.}
}