Tsunami

Destructive nature of a tsunami

What is a Tsunami?

A tsunami is a series of enormous waves formed in the sea or near the coast generated by violent undersea disturbances such as earthquakes, induced movement of the ocean floor, landslides and underwater volcanic eruptions.

Most tsunamis are caused by earthquakes in the sea that induce movements in the sea floor. From the area where a tsunami originates, waves travel in all directions over great distances. In deep waters the tsunami wave is not noticeable but when it approaches the shore, it increases in height.

All tsunamis are potentially dangerous and can be extremely violent and damaging when they hit the shore.

Singapore's sheltered location minimises tsunami risk

Could Singapore be Affected by it?

Singapore is sheltered from tsunamis by the surrounding land masses, such as Peninsula Malaysia in the north, the Indonesian Archipelago in the west and south, and Borneo in the east. The risk of Singapore being affected directly by a tsunami would therefore be very low. Notwithstanding this, Singapore has since the mid-90s established a seismic monitoring system. The system managed by the Meteorological Services Division monitors tremor activity.

Sea recedes suddenly

Do not stay and investigate

Warning Signs to Look Out For

• If you are at the beach or near the ocean and feel the earth shake, run immediately to higher ground. Do not wait for a tsunami warning to be given.

• The sudden draw down of the sea level resulting in a receding shoreline, sometimes by a kilometre or more, is a sign of a preceding or in-between crest of tsunami waves. Head for high ground as quickly as possible.

• Do not approach the beach to investigate.

• If you are advised to evacuate, do so immediately.

What You Should Do if You are Caught in a Tsunami