$Id: README.meca,v 1.4 2009/09/09 23:27:04 guru Exp $ Distributed under the GNU Public License (see file ../LICENSE.TXT) Dear colleagues, psvelomeca is separated into psvelo and psmeca psmeca plots focal mechanisms. Modifications : - depth is in third column (in order to use the same file with pscoupe) - scale is size of beach ball for magnitude 5 that is scalar moment = 4e+23 dynes.cm instead of 1e24 dynes.cm The formula used is the one of Thorne Lay, Terry C. Wallace, Modern Global Seismology, Academic Press p.384. Additions : - plot P and T axis - plot moment tensor - plot events between depth min and max - plot events with color of compressive quadrants function of depth psvelo plots velocity ellipses, strain crosses and strain wedges. It is a part of the GMT supplemental archive, so it can be installed automatically via install_gmt. The scripts meca_1.csh (psmeca) meca_2.csh (pscoupe) meca_3.csh (pspolar) and meca_4.csh (psvelo) will generate meca_1.ps, meca_2.ps, meca_3.ps and meca_4.ps. Psmeca plots seismic moment tensor and/or double couples on a map. Pscoupe plots seismic moment tensor and/or double couples on a cross-section. Pspolar plots polarities on the lower half-sphere. Psvelo plots velocity ellipses, strain crosses, or strain wedges on a map. Genevieve Patau Institut de Physique du Globe de Paris Departement de Sismologie Case 89; 4 Place Jussieu 75252 Paris Cedex 05 Tel: (33) (0)1 44 27 47 79 Telex:202810 Volsism Fax: (33) (0)1 44 27 38 94 E-mail: patau@ipgp.jussieu.fr