Tsunami

Tsunami risk in Tonga is rated as extreme. This is because Tonga lies about 200 km west of the Tonga Trench fault zone, where the Pacific Plate subducts beneath the Australian Plate.
Tonga Trench is a potential source for a marine landslide caused by an earthquake or volcanic eruptions which could trigger a tsunami. Tonga is also located within the Ring of Fire that runs around the Pacific Ocean and where most seismic activities occurs.
Historical accounts show that some 20 tsunamis have affected many islands in Tonga. Most tsunami waves have been small (<1m) with little recorded damage.

However, the Niuatoputapu (NTT) tsunami reached maximum height of 16.9m on the southeast coast.

  • 9 fatalities and 6 seriously injured
  • Government centre destroyed including the hospital, Government staff quaters and offices
  • More than 60% of dwelling houses destroyed
  • Total estimated cost of damage – TOP$18.2m

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s