diff --git a/src/TRestGeant4AnalysisProcess.cxx b/src/TRestGeant4AnalysisProcess.cxx
index 0d9fff8..ca2083b 100644
--- a/src/TRestGeant4AnalysisProcess.cxx
+++ b/src/TRestGeant4AnalysisProcess.cxx
@@ -507,9 +507,17 @@ TRestEvent* TRestGeant4AnalysisProcess::ProcessEvent(TRestEvent* inputEvent) {
     Double_t zDirection = fOutputG4Event->GetPrimaryEventDirection(0).Z();
     SetObservableValue("zDirectionPrimary", zDirection);
 
+    SetObservableValue("eventPrimaryParticleName", fOutputG4Event->GetPrimaryEventParticleName(0));
+    string subEventPrimaryParticleName;
+    if (fOutputG4Event->GetSubID() != 0) {
+        subEventPrimaryParticleName = fOutputG4Event->GetSubEventPrimaryEventParticleName();
+    }
+    SetObservableValue("subEventPrimaryParticleName", subEventPrimaryParticleName);
+
     TVector3 v(xDirection, yDirection, zDirection);
     SetObservableValue("thetaPrimary", v.Theta());
     SetObservableValue("phiPrimary", v.Phi());
+    SetObservableValue("zenithYDegrees", TMath::ACos(-1 * yDirection) * TMath::RadToDeg());
 
     Double_t energyPrimary = fOutputG4Event->GetPrimaryEventEnergy(0);
     SetObservableValue("energyPrimary", energyPrimary);
diff --git a/src/TRestGeant4QuenchingProcess.cxx b/src/TRestGeant4QuenchingProcess.cxx
index ece3d8c..e2f1d56 100644
--- a/src/TRestGeant4QuenchingProcess.cxx
+++ b/src/TRestGeant4QuenchingProcess.cxx
@@ -166,9 +166,9 @@ void TRestGeant4QuenchingProcess::InitProcess() {
         }
     }
 
-    cout << "TRestGeant4QuenchingProcess initialized with volumes" << endl;
+    RESTDebug << "TRestGeant4QuenchingProcess initialized with volumes" << RESTendl;
     for (const auto& volume : fVolumes) {
-        cout << " " << volume << endl;
+        RESTDebug << " " << volume << RESTendl;
     }
 }
 
@@ -244,9 +244,8 @@ void TRestGeant4QuenchingProcess::EndProcess() {}
 
 void TRestGeant4QuenchingProcess::PrintMetadata() {
     BeginPrintProcess();
-    cout << "Printing TRestGeant4QuenchingProcess user configuration" << endl;
     for (auto const& volume : fVolumes) {
-        cout << "Volume: " << volume << endl;
+        RESTMetadata << "Volume: " << volume << RESTendl;
     }
     EndPrintProcess();
 }