diff --git a/Western US/config.json b/Western US/config.json
index 2a24941..838bf8f 100644
--- a/Western US/config.json	
+++ b/Western US/config.json	
@@ -12,6 +12,9 @@
     "truncationLevel": 3.0,
     "imts": ["PGA", "SA0P2", "SA1P0"],
     "gmmUncertainty": true
+  },
+  "performance": {
+    "smoothGrids": false
   }
 }