diff --git a/baystation12.dme b/baystation12.dme
index 9ad0f589c33..9a806182266 100644
--- a/baystation12.dme
+++ b/baystation12.dme
@@ -943,11 +943,13 @@
 #include "code\modules\events\comms_blackout.dm"
 #include "code\modules\events\communications_blackout.dm"
 #include "code\modules\events\disease_outbreak.dm"
+#include "code\modules\events\dust.dm"
 #include "code\modules\events\electrical_storm.dm"
 #include "code\modules\events\event.dm"
 #include "code\modules\events\event_container.dm"
 #include "code\modules\events\event_dynamic.dm"
 #include "code\modules\events\event_manager.dm"
+#include "code\modules\events\gravity.dm"
 #include "code\modules\events\grid_check.dm"
 #include "code\modules\events\infestation.dm"
 #include "code\modules\events\ion_storm.dm"
diff --git a/code/game/gamemodes/events/dust.dm b/code/game/gamemodes/events/dust.dm
index f2c510b9b98..2e8b3b13289 100644
--- a/code/game/gamemodes/events/dust.dm
+++ b/code/game/gamemodes/events/dust.dm
@@ -80,10 +80,11 @@ The "dust" will damage the hull of the station causin minor hull breaches.
 				startx = (TRANSITIONEDGE+1)
 				endy = rand(TRANSITIONEDGE,world.maxy-TRANSITIONEDGE)
 				endx = world.maxx-TRANSITIONEDGE
-		var/goal = locate(endx, endy, 1)
+		var/z_level = pick(config.station_levels)
+		var/goal = locate(endx, endy, z_level)
 		src.x = startx
 		src.y = starty
-		src.z = pick(config.station_levels)
+		src.z = z_level
 		spawn(0)
 			walk_towards(src, goal, 1)
 		return
diff --git a/code/modules/events/dust.dm b/code/modules/events/dust.dm
new file mode 100644
index 00000000000..12be475fc82
--- /dev/null
+++ b/code/modules/events/dust.dm
@@ -0,0 +1,22 @@
+/datum/event/dust
+	startWhen	= 10
+	endWhen		= 30
+
+/datum/event/dust/announce()
+	command_announcement.Announce("The station is now passing through a belt of space dust.", "Dust Alert")
+
+/datum/event/dust/start()
+	dust_swarm(get_severity())
+
+/datum/event/dust/end()
+	command_announcement.Announce("The station has now passed through the belt of space dust.", "Dust Notice")
+
+/datum/event/dust/proc/get_severity()
+	switch(severity)
+		if(EVENT_LEVEL_MUNDANE)
+			return "weak"
+		if(EVENT_LEVEL_MODERATE)
+			return prob(80) ? "norm" : "strong"
+		if(EVENT_LEVEL_MAJOR)
+			return "super"
+	return "weak"
diff --git a/code/modules/events/event.dm b/code/modules/events/event.dm
index 408c85900e6..0b69dc89bb4 100644
--- a/code/modules/events/event.dm
+++ b/code/modules/events/event.dm
@@ -37,16 +37,6 @@
 
 	return total_weight
 
-/datum/event_meta/alien/get_weight(var/list/active_with_role)
-	if(config.aliens_allowed)
-		return ..(active_with_role)
-	return 0
-
-/datum/event_meta/ninja/get_weight(var/list/active_with_role)
-	if(config.ninjas_allowed)
-		return ..(active_with_role)
-	return 0
-
 /datum/event	//NOTE: Times are measured in master controller ticks!
 	var/startWhen		= 0	//When in the lifetime to call start().
 	var/announceWhen	= 0	//When in the lifetime to call announce().
diff --git a/code/modules/events/event_container.dm b/code/modules/events/event_container.dm
index df392cfada4..54e2da314e1 100644
--- a/code/modules/events/event_container.dm
+++ b/code/modules/events/event_container.dm
@@ -124,14 +124,15 @@ var/global/list/severity_to_string = list(EVENT_LEVEL_MUNDANE = "Mundane", EVENT
 	available_events = list(
 		// Severity level, event name, even type, base weight, role weights, one shot, min weight, max weight. Last two only used if set and non-zero
 		new /datum/event_meta(EVENT_LEVEL_MUNDANE, "Nothing",			/datum/event/nothing,			100),
-		new /datum/event_meta(EVENT_LEVEL_MUNDANE, "PDA Spam",			/datum/event/pda_spam, 			0, 		list(ASSIGNMENT_ANY = 4), 0, 25, 50),
-		new /datum/event_meta(EVENT_LEVEL_MUNDANE, "Money Lotto",		/datum/event/money_lotto, 		0, 		list(ASSIGNMENT_ANY = 1), 1, 5,  15),
-		new /datum/event_meta(EVENT_LEVEL_MUNDANE, "Money Hacker",		/datum/event/money_hacker, 		0, 		list(ASSIGNMENT_ANY = 4), 1, 10, 25),
-		new /datum/event_meta(EVENT_LEVEL_MUNDANE, "Economic News",		/datum/event/economic_event,	300),
-		new /datum/event_meta(EVENT_LEVEL_MUNDANE, "Trivial News",		/datum/event/trivial_news, 		400),
-		new /datum/event_meta(EVENT_LEVEL_MUNDANE, "Mundane News", 		/datum/event/mundane_news, 		300),
-		new /datum/event_meta(EVENT_LEVEL_MUNDANE, "Lost Carp",			/datum/event/carp_migration, 	20, 	list(ASSIGNMENT_SECURITY = 10), 1),
 		new /datum/event_meta(EVENT_LEVEL_MUNDANE, "Brand Intelligence",/datum/event/brand_intelligence,20, 	list(ASSIGNMENT_JANITOR = 25),	1),
+		new /datum/event_meta(EVENT_LEVEL_MUNDANE, "Economic News",		/datum/event/economic_event,	300),
+		new /datum/event_meta(EVENT_LEVEL_MUNDANE, "Money Hacker",		/datum/event/money_hacker, 		0, 		list(ASSIGNMENT_ANY = 4), 1, 10, 25),
+		new /datum/event_meta(EVENT_LEVEL_MUNDANE, "Money Lotto",		/datum/event/money_lotto, 		0, 		list(ASSIGNMENT_ANY = 1), 1, 5, 15),
+		new /datum/event_meta(EVENT_LEVEL_MUNDANE, "Lost Carp",			/datum/event/carp_migration, 	20, 	list(ASSIGNMENT_SECURITY = 10), 1),
+		new /datum/event_meta(EVENT_LEVEL_MUNDANE, "Mundane News", 		/datum/event/mundane_news, 		300),
+		new /datum/event_meta(EVENT_LEVEL_MUNDANE, "PDA Spam",			/datum/event/pda_spam, 			0, 		list(ASSIGNMENT_ANY = 4), 0, 25, 50),
+		new /datum/event_meta(EVENT_LEVEL_MUNDANE, "Space Dust",		/datum/event/dust	, 			30, 	list(ASSIGNMENT_ENGINEER = 5), 0, 0, 50),
+		new /datum/event_meta(EVENT_LEVEL_MUNDANE, "Trivial News",		/datum/event/trivial_news, 		400),
 		new /datum/event_meta(EVENT_LEVEL_MUNDANE, "Vermin Infestation",/datum/event/infestation, 		100,	list(ASSIGNMENT_JANITOR = 100)),
 		new /datum/event_meta(EVENT_LEVEL_MUNDANE, "Wallrot",			/datum/event/wallrot, 			0,		list(ASSIGNMENT_ENGINEER = 30, ASSIGNMENT_GARDENER = 50)),
 	)
@@ -140,30 +141,32 @@ var/global/list/severity_to_string = list(EVENT_LEVEL_MUNDANE = "Mundane", EVENT
 	severity = EVENT_LEVEL_MODERATE
 	available_events = list(
 		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Nothing",					/datum/event/nothing,					1230),
-		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Carp School",				/datum/event/carp_migration,			100, 	list(ASSIGNMENT_ENGINEER = 10, ASSIGNMENT_SECURITY = 20), 1),
-		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Rogue Drones",				/datum/event/rogue_drone, 				20,		list(ASSIGNMENT_SECURITY = 20)),
-		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Space vines",				/datum/event/spacevine, 				200,	list(ASSIGNMENT_ENGINEER = 10)),
-		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Meteor Shower",			/datum/event/meteor_shower,				0,		list(ASSIGNMENT_ENGINEER = 20)),
-		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Communication Blackout",	/datum/event/communications_blackout,	500,	list(ASSIGNMENT_AI = 150, ASSIGNMENT_SECURITY = 120)),
-		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Prison Break",				/datum/event/prison_break,				0,		list(ASSIGNMENT_SECURITY = 100)),
-		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Grid Check",				/datum/event/grid_check, 				200,	list(ASSIGNMENT_ENGINEER = 60)),
-		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Electrical Storm",			/datum/event/electrical_storm, 			250,	list(ASSIGNMENT_ENGINEER = 20, ASSIGNMENT_JANITOR = 150)),
-		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Radiation Storm",			/datum/event/radiation_storm, 			0,		list(ASSIGNMENT_MEDICAL = 50), 1),
 		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Appendicitis", 			/datum/event/spontaneous_appendicitis, 	0,		list(ASSIGNMENT_MEDICAL = 10), 1),
-		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Viral Infection",			/datum/event/viral_infection, 			0,		list(ASSIGNMENT_MEDICAL = 150)),
-		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Spider Infestation",		/datum/event/spider_infestation, 		100,	list(ASSIGNMENT_SECURITY = 30), 1),
+		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Carp School",				/datum/event/carp_migration,			100, 	list(ASSIGNMENT_ENGINEER = 10, ASSIGNMENT_SECURITY = 20), 1),
+		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Communication Blackout",	/datum/event/communications_blackout,	500,	list(ASSIGNMENT_AI = 150, ASSIGNMENT_SECURITY = 120)),
+		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Electrical Storm",			/datum/event/electrical_storm, 			250,	list(ASSIGNMENT_ENGINEER = 20, ASSIGNMENT_JANITOR = 150)),
+		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Gravity Failure",			/datum/event/gravity,	 				75,		list(ASSIGNMENT_ENGINEER = 60)),
+		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Grid Check",				/datum/event/grid_check, 				200,	list(ASSIGNMENT_SCIENTIST = 10)),
 		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Ion Storm",				/datum/event/ionstorm, 					0,		list(ASSIGNMENT_AI = 50, ASSIGNMENT_CYBORG = 50, ASSIGNMENT_ENGINEER = 15, ASSIGNMENT_SCIENTIST = 5)),
-		new /datum/event_meta/alien(EVENT_LEVEL_MODERATE, "Random Antagonist",	/datum/event/random_antag,		 		2.5,	list(ASSIGNMENT_SECURITY = 1), 1, 0, 5),
+		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Meteor Shower",			/datum/event/meteor_shower,				0,		list(ASSIGNMENT_ENGINEER = 20)),
+		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Prison Break",				/datum/event/prison_break,				0,		list(ASSIGNMENT_SECURITY = 100)),
+		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Radiation Storm",			/datum/event/radiation_storm, 			0,		list(ASSIGNMENT_MEDICAL = 50), 1),
+		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Random Antagonist",		/datum/event/random_antag,		 		2.5,	list(ASSIGNMENT_SECURITY = 1), 1, 0, 5),
+		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Rogue Drones",				/datum/event/rogue_drone, 				20,		list(ASSIGNMENT_SECURITY = 20)),
+		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Space Dust",				/datum/event/dust,	 					30, 	list(ASSIGNMENT_ENGINEER = 5)),
+		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Spider Infestation",		/datum/event/spider_infestation, 		100,	list(ASSIGNMENT_SECURITY = 30), 1),
+		new /datum/event_meta(EVENT_LEVEL_MODERATE, "Viral Infection",			/datum/event/viral_infection, 			0,		list(ASSIGNMENT_MEDICAL = 150)),
 	)
 
 /datum/event_container/major
 	severity = EVENT_LEVEL_MAJOR
 	available_events = list(
 		new /datum/event_meta(EVENT_LEVEL_MAJOR, "Nothing",			/datum/event/nothing,			1320),
-		new /datum/event_meta(EVENT_LEVEL_MAJOR, "Carp Migration",	/datum/event/carp_migration,	0,	list(ASSIGNMENT_SECURITY =  3), 1),
-		new /datum/event_meta(EVENT_LEVEL_MAJOR, "Viral Infection",	/datum/event/viral_infection,	0,	list(ASSIGNMENT_MEDICAL =  30), 1),
 		new /datum/event_meta(EVENT_LEVEL_MAJOR, "Blob",			/datum/event/blob, 				0,	list(ASSIGNMENT_ENGINEER = 60), 1),
+		new /datum/event_meta(EVENT_LEVEL_MAJOR, "Carp Migration",	/datum/event/carp_migration,	0,	list(ASSIGNMENT_SECURITY =  3), 1),
 		new /datum/event_meta(EVENT_LEVEL_MAJOR, "Meteor Wave",		/datum/event/meteor_wave,		0,	list(ASSIGNMENT_ENGINEER =  3),	1),
+		new /datum/event_meta(EVENT_LEVEL_MAJOR, "Space Vines",		/datum/event/spacevine, 		0,	list(ASSIGNMENT_ENGINEER = 15), 1),
+		new /datum/event_meta(EVENT_LEVEL_MAJOR, "Viral Infection",	/datum/event/viral_infection,	0,	list(ASSIGNMENT_MEDICAL =  30), 1),
 	)
 
 
diff --git a/code/modules/events/event_dynamic.dm b/code/modules/events/event_dynamic.dm
index 2cc225eaf6a..0dbe3a5017c 100644
--- a/code/modules/events/event_dynamic.dm
+++ b/code/modules/events/event_dynamic.dm
@@ -201,7 +201,7 @@ var/list/event_last_fired = list()
 
 		if(istype(M, /mob/living/silicon/robot) && M:module && M:module.name == "medical robot module")
 			active_with_role["Medical"]++
-		if(M.mind.assigned_role in list("Chief Medical Officer", "Medical Doctor"))
+		if(M.mind.assigned_role in medical_positions)
 			active_with_role["Medical"]++
 
 		if(istype(M, /mob/living/silicon/robot) && M:module && M:module.name == "security robot module")
diff --git a/code/modules/events/gravity.dm b/code/modules/events/gravity.dm
new file mode 100644
index 00000000000..078e632842a
--- /dev/null
+++ b/code/modules/events/gravity.dm
@@ -0,0 +1,24 @@
+/datum/event/gravity
+	announceWhen = 5
+
+/datum/event/gravity/setup()
+	endWhen = rand(15, 60)
+
+/datum/event/gravity/announce()
+	command_announcement.Announce("Feedback surge detected in mass-distributions systems. Artificial gravity has been disabled whilst the system reinitializes. Further failures may result in a gravitational collapse and formation of blackholes.", "Gravity Failure")
+
+/datum/event/gravity/start()
+	gravity_is_on = 0
+	for(var/area/A in world)
+		if(A.z in config.station_levels)
+			A.gravitychange(gravity_is_on, A)
+
+/datum/event/gravity/end()
+	if(!gravity_is_on)
+		gravity_is_on = 1
+
+		for(var/area/A in world)
+			if(A.z in config.station_levels)
+				A.gravitychange(gravity_is_on, A)
+
+		command_announcement.Announce("Gravity generators are again functioning within normal parameters. Sorry for any inconvenience.", "Gravity Restored")
diff --git a/code/modules/events/meteors.dm b/code/modules/events/meteors.dm
index 33bee714ffb..45d59ca8cd0 100644
--- a/code/modules/events/meteors.dm
+++ b/code/modules/events/meteors.dm
@@ -1,12 +1,10 @@
-//cael - two events here
-
 //meteor storms are much heavier
 /datum/event/meteor_wave
 	startWhen		= 6
 	endWhen			= 33
 
 /datum/event/meteor_wave/setup()
-	endWhen = rand(10,25) * 3
+	endWhen = rand(15,30) * 3
 
 /datum/event/meteor_wave/announce()
 	command_announcement.Announce("Meteors have been detected on collision course with the station.", "Meteor Alert", new_sound = 'sound/AI/meteors.ogg')
@@ -26,7 +24,7 @@
 	var/waves = 1
 
 /datum/event/meteor_shower/setup()
-	waves = rand(1,4)
+	waves = rand(2,5)
 
 /datum/event/meteor_shower/announce()
 	command_announcement.Announce("The station is now in a meteor shower.", "Meteor Alert")
diff --git a/code/modules/events/random_antagonist.dm b/code/modules/events/random_antagonist.dm
index dbdaa70983c..10f8778b3b3 100644
--- a/code/modules/events/random_antagonist.dm
+++ b/code/modules/events/random_antagonist.dm
@@ -10,4 +10,4 @@
 			valid_types |= antag
 	if(valid_types.len)
 		var/datum/antagonist/antag = pick(valid_types)
-		antag.random_spawn()
\ No newline at end of file
+		antag.random_spawn()
diff --git a/tools/Event Probabilities/Event Probabilities.xls b/tools/Event Probabilities/Event Probabilities.xls
new file mode 100644
index 00000000000..e8085e8d9df
Binary files /dev/null and b/tools/Event Probabilities/Event Probabilities.xls differ