Unannounced phenomena

Unannounced phenomena are occurrences in RuneScape that were not announced by Jagex beforehand.

Will o' wisps
Prior to the introduction of fairy rings, will o' wisps appeared at various points around RuneScape in the locations that the fairy rings would be.

Submarine appearences


On 27 May 2009, submarine periscopes could be occasionally seen surfacing in the water in the following locations:
 * Port Sarim
 * Catherby
 * Ship Yard
 * Port Khazard

The submarine is later used in Hunt for Red Raktuber.

Kuradal
From 3 December 2009, Kuradal appeared in various Slayer-related locations, cast Stat Spy or Monster Examine on a player or monster in the area, then teleported away. She appeared at Aberrant Spectres, Abyssal Demons, Bloodvelds, Blue Dragons, Dagannoths, Dark Beasts, Gargoyles, Green Dragons, Hellhounds, Steel Dragons and Greater demons in Brimhaven Dungeon.

She took up a regular place in the Ancient Cavern on 8 December 2009.

Strange power
On 23 January 2010, at about 19:48 UTC, a strange power was felt by all players online at the time. This had a massive affect on the community, with the RuneScape Forums being flooded by speculation of what it could be and its true purpose.

Later, Jagex confirmed that the strange power was a hint towards Daemonheim, stating, "The strange power that knocked players to their feet in early 2010 came from Daemonheim, or so the Fremennik believe. Their seers traced the source of the power to come from this point in the Wilderness, and they gathered dozens of warriors to explore Daemonheim's depths. Not everyone has come back, however."

Frozen door
The frozen door was present in the God Wars Dungeon since its release, but on 20 December 2010 an "open" option and a rumbling effects was added. When trying to open the door, a voice threatened the player with the following phrases:
 * Mortals, only death awaits you here
 * Release me and know despair
 * Face me and know despair
 * All those who oppose us will perish
 * Give me the power of shadow
 * My revenge will be great
 * Face me and you will suffer
 * You cannot imprison me forever

Falling rocks
On 2 July 2011, at roughly 19:03 UTC, large rocks fell from the sky, causing the screen to shake. The rocks remained in place for a few weeks until the release of Clan Citadels on 26 July 2011.

Chicken Appearances
Chickens started appearing around Runescape after the update on 7 July 2011. The chickens have smoke covering them and disappear after approximately 10 seconds. This is identical to the "Chicken" emote from the Rock fragment reward from Cryptic Clue Fest III.

They appeared in the following locations:
 * Varrock
 * Falador
 * Lumbridge
 * Piscatoris Fishing Colony
 * Canifis
 * Seers' Village
 * Grand Exchange
 * Daemonheim
 * East Ardougne
 * Burthorpe
 * Yanille
 * Neitiznot
 * Tree Gnome Stronghold