Fix missing gcmt convention keys in pygmt.meca

pygmt/src/meca.py

@@ -249,7 +249,16 @@ def update_pointers(data_pointers):
 
         param_conventions = {
             "AKI": ["strike", "dip", "rake", "magnitude"],
-            "GCMT": ["strike1", "dip1", "dip2", "rake2", "mantissa", "exponent"],
+            "GCMT": [
+                "strike1",
+                "dip1",
+                "rake1",
+                "strike2",
+                "dip2",
+                "rake2",
+                "mantissa",
+                "exponent",
+            ],
             "MT": ["mrr", "mtt", "mff", "mrt", "mrf", "mtf", "exponent"],
             "PARTIAL": ["strike1", "dip1", "strike2", "fault_type", "magnitude"],
             "PRINCIPAL_AXIS": [

pygmt/tests/baseline/test_meca_gcmt_convention.png.dvc

@@ -0,0 +1,4 @@
+outs:
+- md5: a44dc0f1af50958aeff2d359ea8b03a7
+  size: 8732
+  path: test_meca_gcmt_convention.png

pygmt/tests/test_meca.py

@@ -1,16 +1,12 @@
 """
 Tests for meca.
 """
-import os
-
 import numpy as np
 import pandas as pd
 import pytest
 from pygmt import Figure
 from pygmt.helpers import GMTTempFile
 
-TEST_DATA_DIR = os.path.join(os.path.dirname(__file__), "data")
-
 
 @pytest.mark.mpl_image_compare
 def test_meca_spec_dictionary():
@@ -210,3 +206,34 @@ def test_meca_loc_array():
         projection="M14c",
     )
     return fig
+
+
+@pytest.mark.mpl_image_compare
+def test_meca_gcmt_convention():
+    """
+    Test plotting beachballs using the global CMT convention.
+    """
+    fig = Figure()
+    # specify focal mechanisms
+    focal_mechanisms = dict(
+        strike1=180,
+        dip1=18,
+        rake1=-88,
+        strike2=0,
+        dip2=72,
+        rake2=-90,
+        mantissa=5.5,
+        exponent=0,
+    )
+    fig.meca(
+        spec=focal_mechanisms,
+        scale="1c",
+        longitude=239.384,
+        latitude=34.556,
+        depth=12,
+        convention="gcmt",
+        region=[239, 240, 34, 35.2],
+        projection="m2.5c",
+        frame=True,
+    )
+    return fig