Home > Japan, SOCIETY > Japan:Scientists warn of huge quake east of Japan Trench

Japan:Scientists warn of huge quake east of Japan Trench

Tuesday, January 31, 2012

Laaska News Jan 31, 2012

Japanese researchers say the March 11th disaster has increased the risk of a major quake and tsunami east of the Japan Trench off northeastern Japan.

The research was carried out by a group at the Japan Agency for Marine-Earth Science and Technology.

The Japan Trench is where the Pacific Plate begins to sink under the tectonic plate extending from land.
The March 11th earthquake originated closer to land from the plate boundary.

The research group installed 20 seismometers on the seabed east of the Japan Trench to analyze aftershocks that occurred between late April and early July last year.

The data showed that the March quake apparently changed the dynamic force deep inside the Pacific Plate.

Before the disaster, many of the deeper quakes involved faults that form when the plate is being compressed.

But the research data showed that many of the post-March aftershocks involved a fault that forms when the plate is pulled apart.

This type of force is known to have caused a magnitude-8 earthquake about 80 years ago off northeastern Japan.

The research group concluded that the risk of the latter type of quake has risen in the region and warns that a tremor could again unleash a massive tsunami.

NHK.
.

Laaska News.
http://www.laaska.wordpress.com

Advertisements