diff --git a/active-crust/fault/mfd-map.json b/active-crust/fault/mfd-map.json
index b58bad9a22c8c0ec120fb7b883222ff67974d79e..df81fd0ca404bc47af1f2e6b13a5a804aef5a364 100644
--- a/active-crust/fault/mfd-map.json
+++ b/active-crust/fault/mfd-map.json
@@ -13,7 +13,7 @@
       "weight": 0.5,
       "value": {
         "type": "GR",
-        "b": 0.8,
+        "b": 0.82,
         "mMin": 6.5,
         "mMax": 7.5,
         "Δm": 0.1
diff --git a/subduction/interface/Aleutian Arc/mfd-map.json b/subduction/interface/Aleutian Arc/mfd-map.json
index c43cf541016dffae1bdc272b72628dc4a58fbb13..83ca17e74194eed169ae35ce775b58f5442c3467 100644
--- a/subduction/interface/Aleutian Arc/mfd-map.json	
+++ b/subduction/interface/Aleutian Arc/mfd-map.json	
@@ -368,9 +368,9 @@
 
 
   "aleutian-arc-narrow": [
-    { "id": "M1", "weight": 1.0, "value": { "type": "GR", "a": 4.9135, "b": 0.85, "mMin": 7.0, "mMax": 8.0, "Δm": 0.1 } }
+    { "id": "M1", "weight": 1.0, "value": { "type": "GR", "a": 4.765841, "b": 0.82, "mMin": 7.0, "mMax": 8.0, "Δm": 0.1 } }
   ],
   "aleutian-arc-wide": [
-    { "id": "M1", "weight": 1.0, "value": { "type": "GR", "a": 4.9135, "b": 0.85, "mMin": 7.0, "mMax": 8.0, "Δm": 0.1 } }
+    { "id": "M1", "weight": 1.0, "value": { "type": "GR", "a": 4.765841, "b": 0.82, "mMin": 7.0, "mMax": 8.0, "Δm": 0.1 } }
   ]
 }