diff --git a/app/src/main/java/de/edotzlaff/schockwelle/SensorMapsActivity.java b/app/src/main/java/de/edotzlaff/schockwelle/SensorMapsActivity.java
index 2786961..78248bd 100644
--- a/app/src/main/java/de/edotzlaff/schockwelle/SensorMapsActivity.java
+++ b/app/src/main/java/de/edotzlaff/schockwelle/SensorMapsActivity.java
@@ -341,7 +341,7 @@ public class SensorMapsActivity extends FragmentActivity implements OnMapReadyCa
                         {
                             float distanceToEarthquake;
                             distanceToEarthquake = distance(currentLocation.getLatitude(), currentLocation.getLongitude(), Double.parseDouble(breitengradQuellVibration), Double.parseDouble(laengengradQuellVibration));
-                            long wellenAusbreitungsGeschwindigkeit = 4500;    //Meter die Sekunde
+                            long wellenAusbreitungsGeschwindigkeit = 500;    //Meter die Sekunde
                             long delayInSeconds = (long) distanceToEarthquake/wellenAusbreitungsGeschwindigkeit; //s
                             long delayInMilliSeconds = delayInSeconds*1000;
                             setVibrationTimer(delayInMilliSeconds,1500,255,f);
@@ -364,7 +364,7 @@ public class SensorMapsActivity extends FragmentActivity implements OnMapReadyCa
                         {
                             float distanceToEarthquake;
                             distanceToEarthquake = distance(currentLocation.getLatitude(), currentLocation.getLongitude(), Double.parseDouble(breitengradQuellVibration), Double.parseDouble(laengengradQuellVibration));
-                            long wellenAusbreitungsGeschwindigkeit = 4500;    //Meter die Sekunde
+                            long wellenAusbreitungsGeschwindigkeit = 500;    //Meter die Sekunde
                             long delayInSeconds = (long) distanceToEarthquake/wellenAusbreitungsGeschwindigkeit; //s
                             long delayInMilliSeconds = delayInSeconds*1000;
                             setVibrationTimer(delayInMilliSeconds,1500,255,f);
@@ -498,13 +498,13 @@ public class SensorMapsActivity extends FragmentActivity implements OnMapReadyCa
     {
         mDatenbank = FirebaseDatabase.getInstance().getReference();
         mDatenbank.child("overviewnodes").child("IDG" + k).child("a_androidid").setValue(getandroidid());
-        /*
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            mDatenbank.child("overviewnodes").child("IDG" + k).child("b_localdatetime").setValue(LocalDateTime.now().toString());
+            //mDatenbank.child("overviewnodes").child("IDG" + k).child("b_localdatetime").setValue(LocalDateTime.now().toString());
+            mDatenbank.child("overviewnodes").child("IDG" + k).child("b_localdatetime").setValue(LocalDateTime.now(ZoneOffset.UTC).toString());
+
         }
 
-         */
-        mDatenbank.child("overviewnodes").child("IDG" + k).child("b_localdatetime").setValue(LocalDateTime.now(ZoneOffset.UTC).toString());
         mDatenbank.child("overviewnodes").child("IDG" + k).child("c_ip").setValue(getDeviceIpAdress());
         if (useOwnGPS)
         {