Hello, I’m using gmt 6.5.0 with shell commands for a while, but don’t understand why the meca module doesn’t change the color of the beachballs with depth as expected using -C. My code is : gmt meca CMT_file.txt -R -J -Sd0.25c+f0 -Chaxby The “CMT_file” comes from globalcmt.org and is formatted fo…

This limitation has been fixed in master (dev version).

Hi @Cyrkhan , difficult to say what is the issue here. Can you please provide an example file for your CMT_file.txt?

Hello, Here is an extract of my CMT_file.txt # Results # Output in GMT psmeca (GMT v>3.3) format # Columns: lon lat depth mrr mtt mpp mrt mrp mtp iexp name # -72.62 18.61 12 1.74 -3.87 2.13 -0.53 -1.06 2.74 26 X Y 201001122153A -72.88 18.58 12 1.22 -0.91 -0.31 -0.03 0.19 0.50 25 X Y 201001122200…

Please, if you want help you must help yourself and post a full working command. And I’ll note that using $region is NOT a reproducible command. Not to mention that doesn’t work on Windows cmd.

Yes, my apologies, the full command is gmt meca CMT_file.txt -R-86/-54/8/22 -JM-70/15/15c -Sd0.25c+f0 -D0/10 -Ggold but the precise geographical zone and the projection used are not the point here. Reading the GMT manual, I thinked that the command gmt meca CMT_file.txt -R-86/-54/8/22 -JM-70/15/…

This looks a bug. Please open an issue with this (but note that this is invalid -Sd0.25c/f0)

It doesn’t work with a master CPT. As a workaround you could use makecpt first: gmt begin map png gmt makecpt -T0/200 -Chaxby -I gmt meca CMT_file.txt -R-86/-54/8/22 -JM-70/15/15c -Sd0.25c+f0 -C gmt end

Changing beach ball color with focal depth using meca

Q&A

Cyrkhan April 6, 2026, 4:34pm 8

Great ! That works !
Thanks a lot ! I think I see now a little better how to use makecpt.

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Changing beach ball color with focal depth using meca

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