Zalzala Koh (Urdu: زلزلہ کوہ, Earthquake Mountain) or Zalzala Jazeera (Urdu: زلزلہ جزیرہ, Earthquake Island) was a small island off the coast of the port city of Gwadar in Balochistan province of Pakistan which appeared on 24 September 2013 just hours after a powerful earthquake in Blochistan on that day.

As predicted by many geologists, the island soon started to submerge, with satellite images indicating the island had sunk 3 m (10 ft) into the sea one month after its initial appearance.

[3] Zalzala Koh may have been a mud volcano,[4] located in the Arabian Sea offshore of Gwadar in Balochistan, Pakistan.

Ali Rashid Tabriz, the head of Pakistan's National Institute of Oceanography, said that the surfacing of the island had been caused by an emission of methane gas on the seabed.

[1][6][7][8] While the surface was lifeless, the seas around the island became a haven for fish and other life forms (including the coral Acabaria delicata), which boosted the local fishing industry.