diff --git a/packages/SystemUI/src/com/android/systemui/shade/NotificationPanelViewController.java b/packages/SystemUI/src/com/android/systemui/shade/NotificationPanelViewController.java
index af12bc2ca9f8f..fc51229f1d6a6 100644
--- a/packages/SystemUI/src/com/android/systemui/shade/NotificationPanelViewController.java
+++ b/packages/SystemUI/src/com/android/systemui/shade/NotificationPanelViewController.java
@@ -2109,6 +2109,9 @@ public final class NotificationPanelViewController implements ShadeSurface, Dump
                     ? QUICK_SETTINGS : (
                     mKeyguardStateController.canDismissLockScreen() ? UNLOCK : BOUNCER_UNLOCK);
             if (!isFalseTouch(x, y, interactionType)) {
+                mShadeLog.logFlingExpands(vel, vectorVel, interactionType,
+                        this.mFlingAnimationUtils.getMinVelocityPxPerSecond(),
+                        mExpandedFraction > 0.5f, mAllowExpandForSmallExpansion);
                 if (Math.abs(vectorVel) < this.mFlingAnimationUtils.getMinVelocityPxPerSecond()) {
                     expands = shouldExpandWhenNotFlinging();
                 } else {
diff --git a/packages/SystemUI/src/com/android/systemui/shade/ShadeLogger.kt b/packages/SystemUI/src/com/android/systemui/shade/ShadeLogger.kt
index 25073c1b64db8..2b772e372f777 100644
--- a/packages/SystemUI/src/com/android/systemui/shade/ShadeLogger.kt
+++ b/packages/SystemUI/src/com/android/systemui/shade/ShadeLogger.kt
@@ -253,6 +253,31 @@ class ShadeLogger @Inject constructor(@ShadeLog private val buffer: LogBuffer) {
         )
     }
 
+    fun logFlingExpands(
+            vel: Float,
+            vectorVel: Float,
+            interactionType: Int,
+            minVelocityPxPerSecond: Float,
+            expansionOverHalf: Boolean,
+            allowExpandForSmallExpansion: Boolean
+    ) {
+        buffer.log(
+            TAG,
+            LogLevel.VERBOSE,
+            {
+                int1 = interactionType
+                long1 = vel.toLong()
+                long2 = vectorVel.toLong()
+                double1 = minVelocityPxPerSecond.toDouble()
+                bool1 = expansionOverHalf
+                bool2 = allowExpandForSmallExpansion
+            },
+            { "NPVC flingExpands called with vel: $long1, vectorVel: $long2, " +
+                    "interactionType: $int1, minVelocityPxPerSecond: $double1 " +
+                    "expansionOverHalf: $bool1, allowExpandForSmallExpansion: $bool2" }
+        )
+    }
+
     fun flingQs(flingType: Int, isClick: Boolean) {
         buffer.log(
             TAG,