diff --git a/src/gov/usgs/earthquake/nshmp/gmm/Gmm.java b/src/gov/usgs/earthquake/nshmp/gmm/Gmm.java
index 80868273392b99eaca3fa220d2c4a913353977b1..b7466a6ade2f4185954634b2ebd44f97be10744b 100644
--- a/src/gov/usgs/earthquake/nshmp/gmm/Gmm.java
+++ b/src/gov/usgs/earthquake/nshmp/gmm/Gmm.java
@@ -979,19 +979,6 @@ public enum Gmm {
   @SuppressWarnings("javadoc")
   public enum Group {
 
-    WUS_18_INTERFACE(
-        "2018 Subduction Interface (WUS) beta",
-        ImmutableList.of(
-            AM_09_BASIN_INTERFACE,
-            BCHYDRO_12_BASIN_INTERFACE,
-            ZHAO_06_BASIN_INTERFACE)),
-    
-    WUS_18_SLAB(
-        "2018 Subduction Intraslab (WUS) beta",
-        ImmutableList.of(
-            BCHYDRO_12_BASIN_SLAB,
-            ZHAO_06_BASIN_SLAB)),
-
     CEUS_14_STABLE_CRUST(
         "2014 Stable Crust (CEUS)",
         ImmutableList.of(
@@ -1022,6 +1009,13 @@ public enum Gmm {
             BCHYDRO_12_INTER,
             ZHAO_06_INTER)),
 
+    WUS_18_INTERFACE(
+        "2018 Subduction Interface (WUS) beta",
+        ImmutableList.of(
+            AM_09_BASIN_INTERFACE,
+            BCHYDRO_12_BASIN_INTERFACE,
+            ZHAO_06_BASIN_INTERFACE)),
+    
     WUS_14_SLAB(
         "2014 Subduction Intraslab (WUS)",
         ImmutableList.of(
@@ -1030,6 +1024,12 @@ public enum Gmm {
             BCHYDRO_12_SLAB,
             ZHAO_06_SLAB)),
 
+    WUS_18_SLAB(
+        "2018 Subduction Intraslab (WUS) beta",
+        ImmutableList.of(
+            BCHYDRO_12_BASIN_SLAB,
+            ZHAO_06_BASIN_SLAB)),
+
     CEUS_08_STABLE_CRUST(
         "2008 Stable Crust (CEUS)",
         ImmutableList.of(