European-Mediterranean regional centroid-moment tensor catalog: solutions for years 2001 and 2002

We present regional centroid-moment tensor (RCMT) solutions for 168 moderate-magnitude earthquakes that occurred in
the European-Mediterranean region during 2001 and 2002. Events with moment magnitudes as low as 4.0 were successfully
analyzed, although this low threshold is only achievable in regions with the best azimuthal coverage and with stations at a few
hundred kilometers distance. Earthquakes with focal depths from 10 to more than 200 km were analyzed. Comparison with
standard Harvard CMTs, when available, shows good agreement. The solutions shown in this paper represent an addition to
the European-Mediterranean RCMT catalog that we are maintaining. The RCMT catalog now spans 6 years, from 1997 to
2002, and contains 420 solutions. We also outline the main seismic sequences that occurred in the European-Mediterranean
region during 2001–2002.

MedNet Data Centre
ORFEUS-MEREDIAN
GEOFON
IRIS

Arvidsson, R., Ekström, G., 1998. Global CMT analysis of moderate earthquakes MW ≥ 4.5 using intermediate period surface waves. Bull. Seismol. Soc. Am. 88, 1003–1013.

Azzara, R., Basili, A., Beranzoli, L., Chiarabba, C., Di Giovanbattista, R., Selvaggi, G., 1993. The seismic sequence of Potenza (May 1990). Ann. Geofis. XXXVI, 237–243.

Di Bucci, D., Mazzoli, S., 2003. The October–November 2002 Molise seismic sequence (Southern Italy): an expression of Adria intraplate deformation. J. Geol. Soc., London 160, 503–
506.

Dziewonski, A.M., Chou, T.-A., Woodhouse, J.H., 1981. Determination of earthquake source parameters from waveform data for studies of global and regional seismicity. J. Geophys.
Res. 86, 2825–2852.

Dziewonski, A.M., Woodhouse, J.H., 1983. An experiment in the systematic study of global seismicity; centroid moment tensor solutions for 201 moderate and large earthquakes of 1981. J.
Geophys. Res. 88, 3247–3271.

Dziewonski, A.M., Ekström, G., Maternovskaya, N.N., 2000. Centroid-moment tensor solutions for October–December 1999. Phys. Earth Planet. Inter. 121, 205–221.

Ekström, G., 1994a. Anomalous earthquakes on volcano ring-fault structures. Earth Plan. Sci. Lett. 128, 707–712.

Ekström, G., 1994b. Teleseismic-analysis of the 1990 and 1991 earthquakes near Potenza. Ann. Geofis. XXXVII, 1591–1599.

Ekström, G., Morelli, A., Boschi, E., Dziewonski, A.M., 1998. Moment tensor analysis of the central Italy earthquake sequence
of September–October 1997. Geophys. Res. Lett. 25, 1971–1974.

Faccenna, C., Piromallo, C., Crespo-Blanc, A., Jolivet, L.,Rossetti, F., 2004. Lateral slab deformation and the origin of the western Mediterranean arcs. Tectonics, 23, TC1012,
doi:10.1029/2002TC001488.

Kahle, H.-G., Cocard, M., Peter, Y., Geiger, A., Reilinger, R.,McClusky, S., King, R., Barka, A., Veis, G., 1999. The GPS strain rate field in the Aegean Sea and western Anatolia. Geophys. Res. Lett. 26 (16).

Kreemer, C., Holt, W.E., Haines, A.J., 2003. An integrated global model of present-day plate motions and plate boundary deformation. Geophys. J. Int. 154, 8–34.

Mc Clusky, S., Reilinger, R., Mahmoud, S., Ben Sari, D., Tealeb, A., 2003. GPS contraints on Africa (Nubia) and Arabia plate motions. Geophys. J. Int. 155, 126–138.

Morelli, A., Ekström, G., Olivieri, M., 2000. Source properties of the 1997–1998 Central Italy earthquake sequence from inversion of long-period and broad-band seismograms. J. Seismol. 4,
365–375.

Nettles, M., Ekström, G., 1998. Faulting mechanism of anomalous earthquakes near Bardarbunga Volcano, Iceland. J. Geophys.
Res. 103, 17973–17984.

Pondrelli, S., Ekström, G., Morelli, A., Primerano, S., 1999. Study of source geometry for tsunamigenic events of the Euro-Mediterranean area. In: International Conference on Tsunamis. UNESCO Books, Paris, pp. 297–307.

Pondrelli, S., Ekström, G., Morelli, A., 2001. Seismotectonic re-evaluation of the 1976 Friuli, Italy, seismic sequence. J. Seismol. 5, 73–83.

Pondrelli, S., Morelli, A., Ekström, G., Mazza, S., Boschi, E., Dziewonski, A.M., 2002. European-Mediterranean regional centroid-moment tensors: 1997–2000. Phys. Earth Planet. Int. 130, 71–101.

Pondrelli, S., Di Luccio, F., Fukuyama, E., Mazza, S., Olivieri, M., Pino, N.A., 2003. Fast determination of moment tensors for the recent Molise (southern Italy) seismic sequence. Orfeus
Newsletter, vol. 5, no. 1, p. 2, http://orfeus.knmi.nl/newsletter/
vol5no1/molise.html.

Reinecker, J., Heidbach, O., Mueller, B., 2003. The 2003 Release of the World Stress Map (available online at http://www.worldstress-
map.org).Roumelioti, Z., Kiratzi, A., Dreger, D., 2004. The source process of the 26 July 2001 Skyros Island (Greece) earthquake. Geophys.
J. Int. 156, 541–548.

van Eck et al., 2002. Towards a Virtual European Broadband Seismograph Network. ORFEUS Electronic Newsletter, vol. 4,no. 1, p. 5, http://orfeus.knmi.nl/newsletter/vol4no1/vebsn.html.

Wessel, P., Smith, W.H.F., 1998. New Improved Version of the Generic Mapping Tools Released. Eos Trans. AGU 79, 579.