diff --git a/volcanic/decollement/gmm-config.json b/volcanic/decollement/gmm-config.json
index 478c6db5ae836d37a3ea40e5bddf69f369a98a15..307d377683b14eb6f53199cc487ecabe7caa0ad4 100644
--- a/volcanic/decollement/gmm-config.json
+++ b/volcanic/decollement/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/volcanic/gmm-config.json b/volcanic/gmm-config.json
index 478c6db5ae836d37a3ea40e5bddf69f369a98a15..307d377683b14eb6f53199cc487ecabe7caa0ad4 100644
--- a/volcanic/gmm-config.json
+++ b/volcanic/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/volcanic/grid/non-summit/deep/gmm-config.json b/volcanic/grid/non-summit/deep/gmm-config.json
index 25a17cb785c6babe6e4bdf9fb862b84ca6690282..307d377683b14eb6f53199cc487ecabe7caa0ad4 100644
--- a/volcanic/grid/non-summit/deep/gmm-config.json
+++ b/volcanic/grid/non-summit/deep/gmm-config.json
@@ -1,5 +1,3 @@
 {
-  "max-distance": 300.0,
-  "epistemic-model": null,
-  "epistemic-tree": null
+  "max-distance": 300.0
 }
diff --git a/volcanic/grid/non-summit/shallow/gmm-config.json b/volcanic/grid/non-summit/shallow/gmm-config.json
deleted file mode 100644
index 478c6db5ae836d37a3ea40e5bddf69f369a98a15..0000000000000000000000000000000000000000
--- a/volcanic/grid/non-summit/shallow/gmm-config.json
+++ /dev/null
@@ -1,9 +0,0 @@
-{
-  "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 }
-  ]
-}
diff --git a/volcanic/grid/non-summit/shallow/gmm-tree.json b/volcanic/grid/non-summit/shallow/gmm-tree.json
deleted file mode 100644
index a8995241b179309c5ffb880a6fb9646321b4a6d6..0000000000000000000000000000000000000000
--- a/volcanic/grid/non-summit/shallow/gmm-tree.json
+++ /dev/null
@@ -1,7 +0,0 @@
-[
-  { "id": "ATKINSON_10", "weight": 0.2 },
-  { "id": "ASK_14", "weight": 0.2 },
-  { "id": "BSSA_14", "weight": 0.2 },
-  { "id": "CB_14", "weight": 0.2 },
-  { "id": "CY_14", "weight": 0.2 }
-]
diff --git a/volcanic/grid/summit/deep/gmm-config.json b/volcanic/grid/summit/deep/gmm-config.json
index 25a17cb785c6babe6e4bdf9fb862b84ca6690282..307d377683b14eb6f53199cc487ecabe7caa0ad4 100644
--- a/volcanic/grid/summit/deep/gmm-config.json
+++ b/volcanic/grid/summit/deep/gmm-config.json
@@ -1,5 +1,3 @@
 {
-  "max-distance": 300.0,
-  "epistemic-model": null,
-  "epistemic-tree": null
+  "max-distance": 300.0
 }
diff --git a/volcanic/grid/summit/shallow/gmm-config.json b/volcanic/grid/summit/shallow/gmm-config.json
deleted file mode 100644
index 478c6db5ae836d37a3ea40e5bddf69f369a98a15..0000000000000000000000000000000000000000
--- a/volcanic/grid/summit/shallow/gmm-config.json
+++ /dev/null
@@ -1,9 +0,0 @@
-{
-  "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 }
-  ]
-}
diff --git a/volcanic/grid/summit/shallow/gmm-tree.json b/volcanic/grid/summit/shallow/gmm-tree.json
deleted file mode 100644
index a8995241b179309c5ffb880a6fb9646321b4a6d6..0000000000000000000000000000000000000000
--- a/volcanic/grid/summit/shallow/gmm-tree.json
+++ /dev/null
@@ -1,7 +0,0 @@
-[
-  { "id": "ATKINSON_10", "weight": 0.2 },
-  { "id": "ASK_14", "weight": 0.2 },
-  { "id": "BSSA_14", "weight": 0.2 },
-  { "id": "CB_14", "weight": 0.2 },
-  { "id": "CY_14", "weight": 0.2 }
-]
diff --git a/volcanic/zone/gmm-config.json b/volcanic/zone/gmm-config.json
index 25a17cb785c6babe6e4bdf9fb862b84ca6690282..307d377683b14eb6f53199cc487ecabe7caa0ad4 100644
--- a/volcanic/zone/gmm-config.json
+++ b/volcanic/zone/gmm-config.json
@@ -1,5 +1,3 @@
 {
-  "max-distance": 300.0,
-  "epistemic-model": null,
-  "epistemic-tree": null
+  "max-distance": 300.0
 }