diff --git a/app/assets/javascripts/src/Metamaps.Visualize.js b/app/assets/javascripts/src/Metamaps.Visualize.js
index 2b8231a8..2353cac5 100644
--- a/app/assets/javascripts/src/Metamaps.Visualize.js
+++ b/app/assets/javascripts/src/Metamaps.Visualize.js
@@ -143,6 +143,9 @@ Metamaps.Visualize = {
       self.mGraph.graph.empty()
     }
 
+
+    if (self.type == 'ForceDirected' && Metamaps.Active.Mapper) $.post('/maps/' + Metamaps.Active.Map.id + '/events/user_presence')
+
     function runAnimation () {
       Metamaps.Loading.hide()
       // load JSON data, if it's not empty
diff --git a/app/controllers/maps_controller.rb b/app/controllers/maps_controller.rb
index b605b5ad..e52b1833 100644
--- a/app/controllers/maps_controller.rb
+++ b/app/controllers/maps_controller.rb
@@ -123,6 +123,9 @@ class MapsController < ApplicationController
       if params[:event] == 'conversation'
         Events::ConversationStartedOnMap.publish!(map, current_user)
         valid_event = true
+      elsif params[:event] == 'user_presence'
+        Events::UserPresentOnMap.publish!(map, current_user)
+        valid_event = true
       end
 
       respond_to do |format|
diff --git a/app/models/event.rb b/app/models/event.rb
index 0ad350ea..66431b61 100644
--- a/app/models/event.rb
+++ b/app/models/event.rb
@@ -1,5 +1,5 @@
 class Event < ActiveRecord::Base
-  KINDS = %w[conversation_started_on_map topic_added_to_map synapse_added_to_map]
+  KINDS = %w[user_present_on_map conversation_started_on_map topic_added_to_map synapse_added_to_map]
 
   #has_many :notifications, dependent: :destroy
   belongs_to :eventable, polymorphic: true
diff --git a/app/models/events/user_present_on_map.rb b/app/models/events/user_present_on_map.rb
new file mode 100644
index 00000000..e40df243
--- /dev/null
+++ b/app/models/events/user_present_on_map.rb
@@ -0,0 +1,18 @@
+class Events::UserPresentOnMap < Event
+  #after_create :notify_users!
+
+  def self.publish!(map, user)
+    create!(kind: "user_present_on_map",
+            eventable: map,
+            map: map,
+            user: user)
+  end
+
+  private
+
+  #def notify_users!
+  #  unless comment_vote.user == comment_vote.comment_user
+  #    notify!(comment_vote.comment_user)
+  #  end
+  #end
+end
diff --git a/app/models/webhooks/slack/user_present_on_map.rb b/app/models/webhooks/slack/user_present_on_map.rb
new file mode 100644
index 00000000..b8d0fac5
--- /dev/null
+++ b/app/models/webhooks/slack/user_present_on_map.rb
@@ -0,0 +1,27 @@
+class Webhooks::Slack::UserPresentOnMap < Webhooks::Slack::Base
+
+  def text
+    "Mapper *#{event.user.name}* has joined the map *#{event.map.name}*. #{view_map_on_metamaps('Map with them')}"
+  end
+  # todo: it would be sweet if it sends it with the metacode as the icon_url
+
+  def attachment_fallback
+    "" #{}"*#{eventable.name}*\n#{eventable.description}\n"
+  end
+
+  def attachment_title
+    "" #proposal_link(eventable)
+  end
+
+  def attachment_text
+    "" # "#{eventable.description}\n"
+  end
+
+  def attachment_fields
+    [{
+      title: "nothing",
+      value: "nothing"
+    }] #[motion_vote_field]
+  end
+
+end