form field labels

projects/nshmp-apps/src/app/gmm/distance/components/control-panel/control-panel.component.html

@@ -64,7 +64,7 @@
       <div class="settings-subsection--section grid-row grid-gap-sm">
         <!-- Source geometry: zTop input -->
         <mat-form-field class="grid-col-4 ztop-input">
-          <mat-label>Z<sub>TOP</sub> (km)</mat-label>
+          <mat-label>Z<sub>TOR</sub> (km)</mat-label>
           <input
             matInput
             [max]="(parameters$ | async)?.zTop.max"

projects/nshmp-apps/src/app/gmm/magnitude/components/source-parameters/source-parameters.component.html

@@ -6,7 +6,7 @@
     <div class="settings-subsection--section grid-row grid-gap-sm">
       <!-- Source Parameters: zTop input -->
       <mat-form-field class="grid-col-4 ztop-input">
-        <mat-label>Z<sub>TOP</sub> (km)</mat-label>
+        <mat-label>Z<sub>TOR</sub> (km)</mat-label>
         <input
           matInput
           [max]="(parameters$ | async)?.zTop?.max"