diff --git a/src/main/java/gov/usgs/earthquake/nshmp/gmm/UsgsPrviBackbone2025.java b/src/main/java/gov/usgs/earthquake/nshmp/gmm/UsgsPrviBackbone2025.java
index 8cb0141e79559e5cb49614e5c9dee001baf9e688..5adb04891e979f3e10612875ddd87dd42cc242bb 100644
--- a/src/main/java/gov/usgs/earthquake/nshmp/gmm/UsgsPrviBackbone2025.java
+++ b/src/main/java/gov/usgs/earthquake/nshmp/gmm/UsgsPrviBackbone2025.java
@@ -82,7 +82,7 @@ public abstract class UsgsPrviBackbone2025 implements GroundMotionModel {
 
     final double Ï„1, Ï„2, Ï„3, Ï„4;
     final double a, b;
-    final double Ï†s2sPrvi, Ï†s2sWus;
+    final double Ï†s2sPrvi, Ï†s2sNga;
     final double Ï„Sub, Ï†Sub, Ï†SubSS, Ï†SubS2S;
 
     Coefficients(
@@ -104,7 +104,7 @@ public abstract class UsgsPrviBackbone2025 implements GroundMotionModel {
 
       Map<String, Double> coeffsPhiS2S = ccPhiS2S.get(imt);
       Ï†s2sPrvi = coeffsPhiS2S.get("phiS2S_PRVI");
-      Ï†s2sWus = coeffsPhiS2S.get("phiS2S_WUS");
+      Ï†s2sNga = coeffsPhiS2S.get("phiS2S_WUS");
 
       Map<String, Double> coeffsSubSigma = ccSubSigma.get(imt);
       Ï„Sub = coeffsSubSigma.get("tau_mean");
@@ -244,9 +244,9 @@ public abstract class UsgsPrviBackbone2025 implements GroundMotionModel {
       Coefficients c = super.coeffs;
       double Ï„ = calcTau(in.Mw, c);
       double Ï†SS = calcPhiSS(in.Mw, c);
-      double ÏƒWus = sqrt(Ï„ * Ï„ + c.Ï†s2sWus * c.Ï†s2sWus + Ï†SS * Ï†SS);
+      double ÏƒNga = sqrt(Ï„ * Ï„ + c.Ï†s2sNga * c.Ï†s2sNga + Ï†SS * Ï†SS);
       double ÏƒPrvi = sqrt(Ï„ * Ï„ + c.Ï†s2sPrvi * c.Ï†s2sPrvi + Ï†SS * Ï†SS);
-      return new double[] { ÏƒWus, ÏƒPrvi };
+      return new double[] { ÏƒNga, ÏƒPrvi };
     }
 
     // active crust tau
@@ -400,9 +400,9 @@ public abstract class UsgsPrviBackbone2025 implements GroundMotionModel {
     @Override
     double[] calcSigmas(GmmInput in) {
       Coefficients c = super.coeffs;
-      double Ïƒ = sqrt(c.Ï„Sub * c.Ï„Sub + c.Ï†Sub * c.Ï†Sub);
+      double ÏƒNga = sqrt(c.Ï„Sub * c.Ï„Sub + c.Ï†Sub * c.Ï†Sub);
       double ÏƒPrvi = sqrt(c.Ï„Sub * c.Ï„Sub + c.Ï†SubS2S * c.Ï†SubS2S + c.Ï†SubSS * c.Ï†SubSS);
-      return new double[] { Ïƒ, ÏƒPrvi };
+      return new double[] { ÏƒNga, ÏƒPrvi };
     }
   }
 
@@ -535,9 +535,9 @@ public abstract class UsgsPrviBackbone2025 implements GroundMotionModel {
     @Override
     double[] calcSigmas(GmmInput in) {
       Coefficients c = super.coeffs;
-      double Ïƒ = sqrt(c.Ï„Sub * c.Ï„Sub + c.Ï†Sub * c.Ï†Sub);
+      double ÏƒNga = sqrt(c.Ï„Sub * c.Ï„Sub + c.Ï†Sub * c.Ï†Sub);
       double ÏƒPrvi = sqrt(c.Ï„Sub * c.Ï„Sub + c.Ï†SubS2S * c.Ï†SubS2S + c.Ï†SubSS * c.Ï†SubSS);
-      return new double[] { Ïƒ, ÏƒPrvi };
+      return new double[] { ÏƒNga, ÏƒPrvi };
     }
   }