diff --git a/active-crust/gmm-config.json b/active-crust/gmm-config.json
index 478c6db5ae836d37a3ea40e5bddf69f369a98a15..307d377683b14eb6f53199cc487ecabe7caa0ad4 100644
--- a/active-crust/gmm-config.json
+++ b/active-crust/gmm-config.json
@@ -1,9 +1,3 @@
 {
-  "max-distance": 300.0,
-  "epistemic-model": "NGA_WEST2",
-  "epistemic-tree": [
-    { "id": "+uâ‚‘", "weight": 0.185, "value": 1.0 },
-    { "id": "~uâ‚‘", "weight": 0.63, "value": 0.0 },
-    { "id": "-uâ‚‘", "weight": 0.185, "value": -1.0 }
-  ]
+  "max-distance": 300.0
 }
diff --git a/stable-crust/gmm-config.json b/stable-crust/gmm-config.json
index 90d5fb8dcac9ec6827a80003effffb247d1778e8..c497562a7e2b448afa6c5e422da86540b0490f42 100644
--- a/stable-crust/gmm-config.json
+++ b/stable-crust/gmm-config.json
@@ -1,5 +1,3 @@
 {
-  "max-distance": 1000.0,
-  "epistemic-model": null,
-  "epistemic-tree": null
+  "max-distance": 1000.0
 }
diff --git a/subduction/interface/gmm-config.json b/subduction/interface/gmm-config.json
index 90d5fb8dcac9ec6827a80003effffb247d1778e8..c497562a7e2b448afa6c5e422da86540b0490f42 100644
--- a/subduction/interface/gmm-config.json
+++ b/subduction/interface/gmm-config.json
@@ -1,5 +1,3 @@
 {
-  "max-distance": 1000.0,
-  "epistemic-model": null,
-  "epistemic-tree": null
+  "max-distance": 1000.0
 }
diff --git a/subduction/slab/gmm-config.json b/subduction/slab/gmm-config.json
index 25a17cb785c6babe6e4bdf9fb862b84ca6690282..307d377683b14eb6f53199cc487ecabe7caa0ad4 100644
--- a/subduction/slab/gmm-config.json
+++ b/subduction/slab/gmm-config.json
@@ -1,5 +1,3 @@
 {
-  "max-distance": 300.0,
-  "epistemic-model": null,
-  "epistemic-tree": null
+  "max-distance": 300.0
 }