diff --git a/src/Core/hco_config_mod.F90 b/src/Core/hco_config_mod.F90
index 42db1a15..91d4d503 100644
--- a/src/Core/hco_config_mod.F90
+++ b/src/Core/hco_config_mod.F90
@@ -2177,7 +2177,7 @@ SUBROUTINE ReadSettings( HcoConfig, IU_HCO, EOF, RC )
        ELSE
           msg = NEW_LINE( 'A' ) // 'HEMCO verbose output is OFF'
        ENDIF
-       CALL HCO_Msg( msg, verb=.TRUE. )
+       IF ( HcoConfig%amIRoot ) CALL HCO_Msg( msg, verb=.TRUE. )
 
        ! Logfile to write into
        CALL GetExtOpt( HcoConfig, CoreNr, 'Logfile', &
diff --git a/src/Extensions/hcox_volcano_mod.F90 b/src/Extensions/hcox_volcano_mod.F90
index 620f5d9c..2c6f8b59 100644
--- a/src/Extensions/hcox_volcano_mod.F90
+++ b/src/Extensions/hcox_volcano_mod.F90
@@ -355,18 +355,21 @@ SUBROUTINE HCOX_Volcano_Init( HcoState, ExtName,ExtState, RC )
     ! Extension Nr.
     ExtNr = GetExtNr( HcoState%Config%ExtList, TRIM(ExtName) )
 
-    IF ( ExtNr > 0 ) THEN
-       ! Write the name of the extension regardless of the verbose setting
-       msg = 'Using HEMCO extension: Volcano (volcanic SO2 emissions)'
-       IF ( HCO_IsVerb( HcoState%Config%Err ) ) THEN
-          CALL HCO_Msg( HcoState%Config%Err, msg, sep1='-' ) ! with separator
+    ! Print to log
+    IF ( HcoState%amIRoot ) THEN
+       IF ( ExtNr > 0 ) THEN
+          ! Write the name of the extension regardless of the verbose setting
+          msg = 'Using HEMCO extension: Volcano (volcanic SO2 emissions)'
+          IF ( HCO_IsVerb( HcoState%Config%Err ) ) THEN
+             CALL HCO_Msg( HcoState%Config%Err, msg, sep1='-' ) ! with separator
+          ELSE
+             CALL HCO_Msg( msg, verb=.TRUE.                   ) ! w/o separator
+          ENDIF
        ELSE
-          CALL HCO_Msg( msg, verb=.TRUE.                   ) ! w/o separator
+          MSG = 'The Volcano extension is turned off.'
+          CALL HCO_MSG( HcoState%Config%Err,  MSG )
+          RETURN
        ENDIF
-    ELSE
-       MSG = 'The Volcano extension is turned off.'
-       CALL HCO_MSG( HcoState%Config%Err,  MSG )
-       RETURN
     ENDIF
 
     ! Enter