diff --git a/app/controllers/forum_topics_controller.rb b/app/controllers/forum_topics_controller.rb
index 70c2c55d8..0329363ac 100644
--- a/app/controllers/forum_topics_controller.rb
+++ b/app/controllers/forum_topics_controller.rb
@@ -67,6 +67,7 @@ class ForumTopicsController < ApplicationController
   def destroy
     check_privilege(@forum_topic)
     @forum_topic.delete!
+    @forum_topic.create_mod_action_for_delete
     flash[:notice] = "Topic deleted"
     respond_with(@forum_topic)
   end
@@ -74,6 +75,7 @@ class ForumTopicsController < ApplicationController
   def undelete
     check_privilege(@forum_topic)
     @forum_topic.undelete!
+    @forum_topic.create_mod_action_for_undelete
     flash[:notice] = "Topic undeleted"
     respond_with(@forum_topic)
   end
diff --git a/app/logical/bulk_revert.rb b/app/logical/bulk_revert.rb
index 510bbccff..591c97010 100644
--- a/app/logical/bulk_revert.rb
+++ b/app/logical/bulk_revert.rb
@@ -7,7 +7,7 @@ class BulkRevert
   def process(creator, constraints = {})
     @constraints = constraints
     
-    ModAction.log("Processed bulk revert for #{constraints.inspect} by #{creator.name}")
+    ModAction.log("Processed bulk revert for #{constraints.inspect} by #{creator.name}",:bulk_revert)
 
     CurrentUser.scoped(creator) do
       ApplicationRecord.without_timeout do
diff --git a/app/logical/moderator/tag_batch_change.rb b/app/logical/moderator/tag_batch_change.rb
index 395344373..f794a4c12 100644
--- a/app/logical/moderator/tag_batch_change.rb
+++ b/app/logical/moderator/tag_batch_change.rb
@@ -31,7 +31,7 @@ module Moderator
         end
       end
 
-      ModAction.log("processed mass update: #{antecedent} -> #{consequent}")
+      ModAction.log("processed mass update: #{antecedent} -> #{consequent}",:mass_update)
     end
   end
 end
diff --git a/app/logical/user_deletion.rb b/app/logical/user_deletion.rb
index 70bb5a090..1b88f2415 100644
--- a/app/logical/user_deletion.rb
+++ b/app/logical/user_deletion.rb
@@ -30,7 +30,7 @@ class UserDeletion
 private
   
   def create_mod_action
-    ModAction.log("user ##{user.id} deleted")
+    ModAction.log("user ##{user.id} deleted",:user_delete)
   end
 
   def clear_saved_searches
diff --git a/app/logical/user_promotion.rb b/app/logical/user_promotion.rb
index 639eadd55..8818f2b84 100644
--- a/app/logical/user_promotion.rb
+++ b/app/logical/user_promotion.rb
@@ -37,11 +37,11 @@ private
   
   def create_mod_actions
     if old_can_approve_posts != user.can_approve_posts?
-      ModAction.log("\"#{promoter.name}\":/users/#{promoter.id} changed approval privileges for \"#{user.name}\":/users/#{user.id} from #{old_can_approve_posts} to [b]#{user.can_approve_posts?}[/b]")
+      ModAction.log("\"#{promoter.name}\":/users/#{promoter.id} changed approval privileges for \"#{user.name}\":/users/#{user.id} from #{old_can_approve_posts} to [b]#{user.can_approve_posts?}[/b]",:user_approval_privilege)
     end
 
     if old_can_upload_free != user.can_upload_free?
-      ModAction.log("\"#{promoter.name}\":/users/#{promoter.id} changed unlimited upload privileges for \"#{user.name}\":/users/#{user.id} from #{old_can_upload_free} to [b]#{user.can_upload_free?}[/b]")
+      ModAction.log("\"#{promoter.name}\":/users/#{promoter.id} changed unlimited upload privileges for \"#{user.name}\":/users/#{user.id} from #{old_can_upload_free} to [b]#{user.can_upload_free?}[/b]",:user_upload_privilege)
     end
   end
   
diff --git a/app/models/artist.rb b/app/models/artist.rb
index a0ae7afa0..8f65c449b 100644
--- a/app/models/artist.rb
+++ b/app/models/artist.rb
@@ -436,6 +436,7 @@ class Artist < ApplicationRecord
           end
 
           update_column(:is_banned, false)
+          ModAction.log("unbanned artist ##{id}",:artist_unban)
         end
       end
     end
@@ -458,6 +459,7 @@ class Artist < ApplicationRecord
           end
 
           update_column(:is_banned, true)
+          ModAction.log("banned artist ##{id}",:artist_ban)
         end
       end
     end
diff --git a/app/models/ban.rb b/app/models/ban.rb
index f6a8e553b..6e8499ffb 100644
--- a/app/models/ban.rb
+++ b/app/models/ban.rb
@@ -126,6 +126,6 @@ class Ban < ApplicationRecord
   end
 
   def create_mod_action
-    ModAction.log(%{Banned "#{user_name}":/users/#{user_id} until #{expires_at}})
+    ModAction.log(%{Banned "#{user_name}":/users/#{user_id} until #{expires_at}},:user_ban)
   end
 end
diff --git a/app/models/comment.rb b/app/models/comment.rb
index 04abff0f0..1a5cbdd4d 100644
--- a/app/models/comment.rb
+++ b/app/models/comment.rb
@@ -11,12 +11,12 @@ class Comment < ApplicationRecord
   before_validation :initialize_creator, :on => :create
   before_validation :initialize_updater
   after_create :update_last_commented_at_on_create
-  after_update(:if => lambda {|rec| CurrentUser.id != rec.creator_id}) do |rec|
-    ModAction.log("comment ##{rec.id} updated by #{CurrentUser.name}")
+  after_update(:if => lambda {|rec| (!rec.is_deleted? || !rec.is_deleted_changed?) && CurrentUser.id != rec.creator_id}) do |rec|
+    ModAction.log("comment ##{rec.id} updated by #{CurrentUser.name}",:comment_update)
   end
   after_save :update_last_commented_at_on_destroy, :if => lambda {|rec| rec.is_deleted? && rec.is_deleted_changed?}
   after_save(:if => lambda {|rec| rec.is_deleted? && rec.is_deleted_changed? && CurrentUser.id != rec.creator_id}) do |rec|
-    ModAction.log("comment ##{rec.id} deleted by #{CurrentUser.name}")
+    ModAction.log("comment ##{rec.id} deleted by #{CurrentUser.name}",:comment_delete)
   end
   attr_accessible :body, :post_id, :do_not_bump_post, :is_deleted, :as => [:member, :gold, :platinum, :builder, :moderator, :admin]
   attr_accessible :is_sticky, :as => [:moderator, :admin]
diff --git a/app/models/forum_post.rb b/app/models/forum_post.rb
index 2160aeb65..b4ec928d9 100644
--- a/app/models/forum_post.rb
+++ b/app/models/forum_post.rb
@@ -20,10 +20,10 @@ class ForumPost < ApplicationRecord
   before_destroy :validate_topic_is_unlocked
   after_save :delete_topic_if_original_post
   after_update(:if => lambda {|rec| rec.updater_id != rec.creator_id}) do |rec|
-    ModAction.log("#{CurrentUser.name} updated forum ##{rec.id}")
+    ModAction.log("#{CurrentUser.name} updated forum ##{rec.id}",:forum_post_update)
   end
   after_destroy(:if => lambda {|rec| rec.updater_id != rec.creator_id}) do |rec|
-    ModAction.log("#{CurrentUser.name} deleted forum ##{rec.id}")
+    ModAction.log("#{CurrentUser.name} deleted forum ##{rec.id}",:forum_post_delete)
   end
   mentionable(
     :message_field => :body, 
diff --git a/app/models/forum_topic.rb b/app/models/forum_topic.rb
index 061714589..6e1e27aff 100644
--- a/app/models/forum_topic.rb
+++ b/app/models/forum_topic.rb
@@ -28,6 +28,9 @@ class ForumTopic < ApplicationRecord
   validates :title, :length => {:maximum => 255}
   accepts_nested_attributes_for :original_post
   after_update :update_orignal_post
+  after_save(:if => lambda {|rec| rec.is_locked? && rec.is_locked_changed?}) do |rec|
+    ModAction.log("locked forum topic ##{id} (title: #{title})",:forum_topic_lock)
+  end
 
   module CategoryMethods
     extend ActiveSupport::Concern
@@ -154,6 +157,14 @@ class ForumTopic < ApplicationRecord
     user.level >= min_level
   end
 
+  def create_mod_action_for_delete
+    ModAction.log("deleted forum topic ##{id} (title: #{title})",:forum_topic_delete)
+  end
+
+  def create_mod_action_for_undelete
+    ModAction.log("undeleted forum topic ##{id} (title: #{title})",:forum_topic_undelete)
+  end
+
   def initialize_is_deleted
     self.is_deleted = false if is_deleted.nil?
   end
diff --git a/app/models/ip_ban.rb b/app/models/ip_ban.rb
index 2f838eeb2..0243c4bf2 100644
--- a/app/models/ip_ban.rb
+++ b/app/models/ip_ban.rb
@@ -7,10 +7,10 @@ class IpBan < ApplicationRecord
   validates_uniqueness_of :ip_addr, :if => lambda {|rec| rec.ip_addr =~ IP_ADDR_REGEX}
   attr_accessible :ip_addr, :reason
   after_create do |rec|
-    ModAction.log("#{CurrentUser.name} created ip ban for #{rec.ip_addr}")
+    ModAction.log("#{CurrentUser.name} created ip ban for #{rec.ip_addr}",:ip_ban_create)
   end
   after_destroy do |rec|
-    ModAction.log("#{CurrentUser.name} deleted ip ban for #{rec.ip_addr}")
+    ModAction.log("#{CurrentUser.name} deleted ip ban for #{rec.ip_addr}",:ip_ban_delete)
   end
 
   def self.is_banned?(ip_addr)
diff --git a/app/models/mod_action.rb b/app/models/mod_action.rb
index 02c7d6fef..656a2ddc2 100644
--- a/app/models/mod_action.rb
+++ b/app/models/mod_action.rb
@@ -2,7 +2,54 @@ class ModAction < ApplicationRecord
   belongs_to :creator, :class_name => "User"
   before_validation :initialize_creator, :on => :create
   validates_presence_of :creator_id
-  attr_accessible :description
+  attr_accessible :description, :category
+
+  #####DIVISIONS#####
+  #Groups:     0-999
+  #Individual: 1000-1999
+  #####Actions#####
+  #Create:   0
+  #Update:   1
+  #Delete:   2
+  #Undelete: 3
+  #Ban:      4
+  #Unban:    5
+  #Misc:     6-19
+  enum category: {
+    user_delete: 2,
+    user_ban: 4,
+    user_name_change: 6,
+    user_level: 7,
+    user_approval_privilege: 8,
+    user_upload_privilege: 9,
+    user_feedback_update: 21,
+    user_feedback_delete: 22,
+    post_delete: 42,
+    post_undelete: 43,
+    post_ban: 44,
+    post_unban: 45,
+    post_permanent_delete: 46,
+    pool_delete: 62,
+    pool_undelete: 63,
+    artist_ban: 184,
+    artist_unban: 185,
+    comment_update: 81,
+    comment_delete: 82,
+    forum_topic_delete: 202,
+    forum_topic_undelete: 203,
+    forum_topic_lock: 206,
+    forum_post_update: 101,
+    forum_post_delete: 102,
+    tag_alias_create: 120,
+    tag_alias_update: 121,
+    tag_implication_create: 140,
+    tag_implication_update: 141,
+    ip_ban_create: 160,
+    ip_ban_delete: 162,
+    mass_update: 1000,
+    bulk_revert: 1001,
+    other: 2000
+  }
 
   def self.search(params = {})
     q = where("true")
@@ -12,11 +59,27 @@ class ModAction < ApplicationRecord
       q = q.where("creator_id = ?", params[:creator_id].to_i)
     end
 
+    if params[:creator_name].present?
+      q = q.where("creator_id = (select _.id from users _ where lower(_.name) = ?)", params[:creator_name].mb_chars.downcase)
+    end
+
+    if params[:category].present?
+      q = q.attribute_matches(:category, params[:category])
+    end
+
     q
   end
 
-  def self.log(desc)
-    create(:description => desc)
+  def category_id
+    self.class.categories[category]
+  end
+
+  def method_attributes
+    super + [:category_id]
+  end
+
+  def self.log(desc, cat = :other)
+    create(:description => desc,:category => categories[cat])
   end
 
   def initialize_creator
diff --git a/app/models/pool.rb b/app/models/pool.rb
index d0f461d82..dfc5f6df5 100644
--- a/app/models/pool.rb
+++ b/app/models/pool.rb
@@ -218,15 +218,11 @@ class Pool < ApplicationRecord
   end
 
   def create_mod_action_for_delete
-    ModAction.log("deleted pool ##{id} (name: #{name})")
+    ModAction.log("deleted pool ##{id} (name: #{name})",:pool_delete)
   end
 
   def create_mod_action_for_undelete
-    ModAction.log("undeleted pool ##{id} (name: #{name})")
-  end
-
-  def create_mod_action_for_destroy
-    ModAction.log("permanently deleted pool ##{id} name=#{name} post_ids=#{post_ids}")
+    ModAction.log("undeleted pool ##{id} (name: #{name})",:pool_undelete)
   end
 
   def add!(post)
diff --git a/app/models/post.rb b/app/models/post.rb
index d00551635..eff7d4b52 100644
--- a/app/models/post.rb
+++ b/app/models/post.rb
@@ -1362,7 +1362,7 @@ class Post < ApplicationRecord
 
       transaction do
         Post.without_timeout do
-          ModAction.log("permanently deleted post ##{id}")
+          ModAction.log("permanently deleted post ##{id}",:post_permanent_delete)
 
           give_favorites_to_parent
           update_children_on_destroy
@@ -1378,12 +1378,12 @@ class Post < ApplicationRecord
 
     def ban!
       update_column(:is_banned, true)
-      ModAction.log("banned post ##{id}")
+      ModAction.log("banned post ##{id}",:post_ban)
     end
 
     def unban!
       update_column(:is_banned, false)
-      ModAction.log("unbanned post ##{id}")
+      ModAction.log("unbanned post ##{id}",:post_unban)
     end
 
     def delete!(reason, options = {})
@@ -1406,7 +1406,7 @@ class Post < ApplicationRecord
         give_favorites_to_parent if options[:move_favorites]
 
         unless options[:without_mod_action]
-          ModAction.log("deleted post ##{id}, reason: #{reason}")
+          ModAction.log("deleted post ##{id}, reason: #{reason}",:post_delete)
         end
       end
     end
@@ -1429,7 +1429,7 @@ class Post < ApplicationRecord
       self.approver_id = CurrentUser.id
       flags.each {|x| x.resolve!}
       save
-      ModAction.log("undeleted post ##{id}")
+      ModAction.log("undeleted post ##{id}",:post_undelete)
     end
 
     def replace!(params)
diff --git a/app/models/post_approval.rb b/app/models/post_approval.rb
index 24cc397a1..8ac4a015b 100644
--- a/app/models/post_approval.rb
+++ b/app/models/post_approval.rb
@@ -28,7 +28,7 @@ class PostApproval < ApplicationRecord
   end
 
   def approve_post
-    ModAction.log("undeleted post ##{post_id}") if post.is_deleted
+    ModAction.log("undeleted post ##{post_id}",:post_undelete) if post.is_deleted
 
     post.flags.each(&:resolve!)
     post.update({ approver: user, is_flagged: false, is_pending: false, is_deleted: false }, without_protection: true)
diff --git a/app/models/tag_alias.rb b/app/models/tag_alias.rb
index 84dcd4f1f..d289837b5 100644
--- a/app/models/tag_alias.rb
+++ b/app/models/tag_alias.rb
@@ -253,7 +253,7 @@ class TagAlias < TagRelationship
     alias_desc = %Q("tag alias ##{id}":[#{Rails.application.routes.url_helpers.tag_alias_path(self)}]: [[#{antecedent_name}]] -> [[#{consequent_name}]])
 
     if id_changed?
-      ModAction.log("created #{status} #{alias_desc}")
+      ModAction.log("created #{status} #{alias_desc}",:tag_alias_create)
     else
       # format the changes hash more nicely.
       change_desc = changes.except(:updated_at).map do |attribute, values|
@@ -265,7 +265,7 @@ class TagAlias < TagRelationship
         end
       end.join(", ")
 
-      ModAction.log("updated #{alias_desc}\n#{change_desc}")
+      ModAction.log("updated #{alias_desc}\n#{change_desc}",:tag_alias_update)
     end
   end
 end
diff --git a/app/models/tag_implication.rb b/app/models/tag_implication.rb
index d50e7df18..4863a7551 100644
--- a/app/models/tag_implication.rb
+++ b/app/models/tag_implication.rb
@@ -194,7 +194,7 @@ class TagImplication < TagRelationship
       implication = %Q("tag implication ##{id}":[#{Rails.application.routes.url_helpers.tag_implication_path(self)}]: [[#{antecedent_name}]] -> [[#{consequent_name}]])
 
       if id_changed?
-        ModAction.log("created #{status} #{implication}")
+        ModAction.log("created #{status} #{implication}",:tag_implication_create)
       else
         # format the changes hash more nicely.
         change_desc = changes.except(:updated_at).map do |attribute, values|
@@ -206,7 +206,7 @@ class TagImplication < TagRelationship
           end
         end.join(", ")
 
-        ModAction.log("updated #{implication}\n#{change_desc}")
+        ModAction.log("updated #{implication}\n#{change_desc}",:tag_implication_update)
       end
     end
 
diff --git a/app/models/user.rb b/app/models/user.rb
index 4e7297bee..75ec684cd 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -439,10 +439,10 @@ class User < ApplicationRecord
 
     def create_mod_action
       if level_changed?
-        ModAction.log(%{"#{name}":/users/#{id} level changed #{level_string_was} -> #{level_string}})
+        ModAction.log(%{"#{name}":/users/#{id} level changed #{level_string_was} -> #{level_string}},:user_level)
       end
     end
-    
+
     def set_per_page
       if per_page.nil? || !is_gold?
         self.per_page = Danbooru.config.posts_per_page
diff --git a/app/models/user_feedback.rb b/app/models/user_feedback.rb
index 71c6da2d2..a58a55a6c 100644
--- a/app/models/user_feedback.rb
+++ b/app/models/user_feedback.rb
@@ -11,10 +11,10 @@ class UserFeedback < ApplicationRecord
   validate :user_is_not_creator
   after_create :create_dmail
   after_update(:if => lambda {|rec| CurrentUser.id != rec.creator_id}) do |rec|
-    ModAction.log(%{#{CurrentUser.name} updated user feedback for "#{rec.user_name}":/users/#{rec.user_id}})
+    ModAction.log(%{#{CurrentUser.name} updated user feedback for "#{rec.user_name}":/users/#{rec.user_id}},:user_feedback_update)
   end
   after_destroy(:if => lambda {|rec| CurrentUser.id != rec.creator_id}) do |rec|
-    ModAction.log(%{#{CurrentUser.name} deleted user feedback for "#{rec.user_name}":/users/#{rec.user_id}})
+    ModAction.log(%{#{CurrentUser.name} deleted user feedback for "#{rec.user_name}":/users/#{rec.user_id}},:user_feedback_delete)
   end
 
   module SearchMethods
diff --git a/app/views/mod_actions/_search.html.erb b/app/views/mod_actions/_search.html.erb
new file mode 100644
index 000000000..035041fc3
--- /dev/null
+++ b/app/views/mod_actions/_search.html.erb
@@ -0,0 +1,5 @@
+<%= simple_form_for(:search, method: :get, url: mod_actions_path, defaults: { required: false }, html: { class: "inline-form" }) do |f| %>
+  <%= f.input :creator_name, label: "Creator", input_html: { value: params[:search][:creator_name] } %>
+  <%= f.input :category, label: "Category", collection: ModAction.categories.map {|k,v| [k.capitalize.tr("_"," "), v]}, include_blank: true,selected: params[:search][:category] %>
+  <%= f.submit "Search" %>
+<% end %>
diff --git a/app/views/mod_actions/index.html.erb b/app/views/mod_actions/index.html.erb
index 32f30d5ef..6dc39dd1f 100644
--- a/app/views/mod_actions/index.html.erb
+++ b/app/views/mod_actions/index.html.erb
@@ -1,6 +1,9 @@
 <div id="c-mod-actions">
   <div id="a-index">
     <h1>Mod Actions</h1>
+
+    <%= render "search" %>
+
     <table class="striped" width="100%">
       <thead>
         <tr>
diff --git a/db/migrate/20180113211343_add_category_to_mod_actions.rb b/db/migrate/20180113211343_add_category_to_mod_actions.rb
new file mode 100644
index 000000000..36534abc2
--- /dev/null
+++ b/db/migrate/20180113211343_add_category_to_mod_actions.rb
@@ -0,0 +1,7 @@
+class AddCategoryToModActions < ActiveRecord::Migration
+  def change
+    ModAction.without_timeout do
+      add_column :mod_actions, :category, :integer
+    end
+  end
+end
diff --git a/db/structure.sql b/db/structure.sql
index 430544698..5d087b2a4 100644
--- a/db/structure.sql
+++ b/db/structure.sql
@@ -2315,7 +2315,8 @@ CREATE TABLE mod_actions (
     creator_id integer NOT NULL,
     description text NOT NULL,
     created_at timestamp without time zone,
-    updated_at timestamp without time zone
+    updated_at timestamp without time zone,
+    category integer
 );
 
 
@@ -7547,3 +7548,5 @@ INSERT INTO schema_migrations (version) VALUES ('20171219001521');
 
 INSERT INTO schema_migrations (version) VALUES ('20171230220225');
 
+INSERT INTO schema_migrations (version) VALUES ('20180113211343');
+
diff --git a/test/unit/post_test.rb b/test/unit/post_test.rb
index 92cab5c23..916bced1c 100644
--- a/test/unit/post_test.rb
+++ b/test/unit/post_test.rb
@@ -477,6 +477,7 @@ class PostTest < ActiveSupport::TestCase
         should "create a mod action" do
           @post.undelete!
           assert_equal("undeleted post ##{@post.id}", ModAction.last.description)
+          assert_equal("post_undelete", ModAction.last.category)
         end
       end
 
@@ -489,6 +490,7 @@ class PostTest < ActiveSupport::TestCase
         should "create a mod action" do
           @post.approve!
           assert_equal("undeleted post ##{@post.id}", ModAction.last.description)
+          assert_equal("post_undelete", ModAction.last.category)
         end
       end
 
diff --git a/test/unit/user_test.rb b/test/unit/user_test.rb
index 3a1404f35..985c6f341 100644
--- a/test/unit/user_test.rb
+++ b/test/unit/user_test.rb
@@ -55,6 +55,7 @@ class UserTest < ActiveSupport::TestCase
           @user.invite!(User::Levels::BUILDER, "1")
         end
         assert_equal(%{"#{@user.name}":/users/#{@user.id} level changed Member -> Builder}, ModAction.last.description)
+        assert_equal("user_level", ModAction.last.category)
       end
     end