Beachball

Q&A
1

hello everyone,
this is part of my file with information about focal mechanism

“lat_orig”,“lon_orig”,“depth”,“mrr”,“mss”,“mee”,“mrs”,“mre”,“mse”,“exp”,“x”,“y”,“ev_id”
“44.71”,“9.35”,“0.00”,"-0.780",“0.560”,“0.220”,"-1.030","-0.170","-0.670",“22”,“0”,“0”,“S200504181059A”
“42.72”,“18.95”,“22.00”,"-0.140",“1.030”,"-0.890",“4.260”,"-3.490","-0.440",“22”,“0”,“0”,“S200505192319A”
“42.68”,“17.37”,“5.00”,“1.420”,"-0.220","-1.200",“0.580”,"-1.180",“0.640”,“22”,“0”,“0”,“S200507032344A”
“40.00”,“12.71”,“502.00”,"-0.040",“0.830”,"-0.800","-0.290",“0.180”,“0.610”,“23”,“0”,“0”,“C200507260332A”
“41.47”,“12.53”,“10.00”,“0.200”,"-1.090",“0.890”,“0.850”,“0.110”,“1.210”,“23”,“0”,“0”,“S200508221202A”
“46.00”,“6.90”,“7.00”,"-1.000",“6.390”,"-5.390","-1.560","-3.680","-1.220",“22”,“0”,“0”,“S200509081127A”
“43.15”,“18.20”,“19.00”,“2.720”,"-2.740",“0.030”,"-2.220","-0.480",“2.980”,“23”,“0”,“0”,“S200509270025A”
“37.61”,“14.16”,“61.00”,“1.670”,"-4.190",“2.510”,"-0.600","-1.540","-7.790",“22”,“0”,“0”,“S200511211057A”
“43.41”,“17.46”,“10.00”,“2.050”,"-1.790","-0.260","-0.470",“0.330”,"-0.030",“22”,“0”,“0”,“S200601281926A”
“38.15”,“15.20”,“9.00”,"-3.750",“0.920”,“2.820”,“1.540”,“2.710”,“1.070”,“22”,“0”,“0”,“S200602270434A”
“43.40”,“13.49”,“33.00”,"-0.190",“0.230”,"-0.040","-0.200","-0.480","-1.370",“22”,“0”,“0”,“S200604101903A”
“44.02”,“11.81”,“10.00”,“5.230”,"-4.870","-0.360",“2.180”,"-0.940",“2.610”,“22”,“0”,“0”,“S200604162115A”
“39.57”,“17.14”,“10.00”,“0.260”,“1.450”,"-1.710","-0.150",“0.100”,“0.090”,“23”,“0”,“0”,“C200604170244A”
“43.64”,“10.23”,“10.00”,"-1.830",“1.480”,“0.340”,"-0.640","-0.970","-0.910",“22”,“0”,“0”,“S200604172142A”
“41.80”,“15.90”,“31.00”,“0.890”,"-0.840","-0.050",“0.170”,“0.300”,"-0.430",“23”,“0”,“0”,“S200605290220A”
“37.63”,“16.52”,“46.00”,"-1.580",“3.380”,"-1.800","-0.510",“0.090”,"-5.400",“22”,“0”,“0”,“S200605301130A”
“39.73”,“16.60”,“15.00”,“1.340”,“0.010”,"-1.350","-0.170",“0.040”,“0.360”,“23”,“0”,“0”,“S200606221934A”
“40.57”,“16.19”,“34.00”,“0.850”,“0.080”,"-0.930",“0.700”,"-0.260","-1.010",“22”,“0”,“0”,“S200609071531A”

Why don’t plot ?
Because there are “”?

the code is it : gmt meca C:\programs\focal_mechanism.txt -Sm0.30 -i0-9 -C

Thanks you

2

The usual input files for GMT plotting don’t have either quotes ‘"’ or commas. Here is a small file from the Global CMT catalog:
-97.88 16.53 20 3.19 -2.53 -0.66 5.46 -3.03 1.11 26 -98.5 14.0 2018/02/16
-98.39 16.60 15 0.68 -0.56 -0.12 1.74 -0.66 0.24 27 -101.0 14.0 2012/03/20
-96.07 16.02 22 0.70 -0.70 0.01 1.09 -0.64 0.17 27 -96.0 14.0 2020/06/23
-99.74 17.03 21 2.29 -2.13 -0.16 2.41 -1.43 0.68 26 -101.0 20.5 2021/09/08
I plot this with gmt psmeca CMT3D -Sm0.9 -J -R -O -K -C -T0 -Zdepth.cpt -W1p,black >> $outps

3

Yes, quotes is for text only.

4

The first ~2 hours of GAGE Short Course: The Generic Mapping Tools for Geodesy: Day Two of Two was useful for me when plotting beachballs.