Journal of Seismology

, Volume 16, Issue 2, pp 147–167 | Cite as

Regional centroid moment tensor solutions in Cyprus from 1977 to the present and seismotectonic implications

  • P. Imprescia
  • S. Pondrelli
  • G. Vannucci
  • S. Gresta
Original Article


We analyzed digital seismic records in order to extend back in time the catalog of regional centroid moment tensors (RCMTs) for the Cyprus region. We applied the analysis and inversion methodology also used for the present-day seismicity on seismograms recorded at regional distance. We computed 18 new regional CMTs of earthquakes of moderate magnitude (4.8 ≤ M ≤ 5.5) which occurred in the Cyprus region for the time span 1977–1996. These new focal mechanisms improved the knowledge given by the previously computed solutions carried out by other institutions, as well as the dataset of available earthquake source parameters. The complete focal mechanism database contributed to better define the deformation styles in the study area and to obtain a detailed characterization of the geodynamics of the Cyprus area. New RCMTs support the hypothesis that Cyprus is located in the middle of the transition area from subduction to continental collision along the Africa–Arabian–Eurasian boundary. In particular, data confirm (a) this transition zone is strictly located west of Cyprus, probably related to a tear in the subduction system, and (b) the still active compression in the Cyprus Arc can be seen as a starting point of the continental collision eastward.


Focal mechanisms Moment tensor Seismic datasets Seismotectonics Cyprus area 



This work was partly supported by the University of Catania grant “Fondi di Ateneo 2008”. P.I. has benefited of a Ph.D. grant by University of Catania. We are also grateful to the editor and to the anonymous referees that greatly helped with their comments and suggestions. Data will be downloadable at a dedicated website:

Supplementary material

10950_2011_9254_MOESM1_ESM.xls (34 kb)
Table S1 Events from 1977 to 1996 for the USGS catalog, for which IRIS ( digital seismograms and waveforms are available. Events with a focal solutions (*) are indicated. Earthquakes with magnitude (M) in the range 4.8-5.5 are indicated. (XLS 34.5 kb)
10950_2011_9254_MOESM2_ESM.xls (54 kb)
Table S2 Main parameters of earthquakes with M>4.8. Events from 1977 to 1996 (+), for which IRIS ( digital seismograms and waveforms were searched (*) and available GCMT moment-tensor solutions (G) are indicated. (XLS 54.0 kb)
10950_2011_9254_MOESM3_ESM.xls (273 kb)
Table S3 Focal mechanisms solutions from various on-line CMT/RCMT catalogs and available first-motion focal mechanisms (from EMMA 3. 1 dataset). Preferred focal mechanisms (*), from 1977 to 1996 (+) and magnitude (M) between 4.5 and 5.5 are indicated. (XLS 273 kb)
10950_2011_9254_MOESM4_ESM.xls (56 kb)
Table S4 List of seismic stations that recorded analyzed events. (XLS 55.5 kb)
10950_2011_9254_MOESM5_ESM.xls (34 kb)
Table S5 New RCMT focal mechanisms. (XLS 34.0 kb)
10950_2011_9254_MOESM6_ESM.xls (31 kb)
Table S2 Focal mechanisms common to EMMA 3.1 dataset and new computed RCMTs (a) and their EMMA 3.1 references (b). (XLS 31.0 kb)


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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • P. Imprescia
    • 1
  • S. Pondrelli
    • 2
  • G. Vannucci
    • 2
  • S. Gresta
    • 1
  1. 1.Dipartimento di Scienze GeologicheUniversità di CataniaCataniaItaly
  2. 2.INGV—Sezione di BolognaBolognaItaly

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