National Geographic WORLD OCEAN FLOOR Tsunami Earthquake Map Japan Indonesia

Description

Large-format full-color fold-out map of the world ocean floor, published by the National Geographic Society.
This 2-sided map opens to a very generous 74 x 107 cm [29" x 42"] and is drawn on Mercator's Projection, at a scale of 1:42,440,000.
One side depicts the rugged topography of the ocean floor
before
two major undersea earthquakes and the disastrous tsunamis they created — the 2004 Indian Ocean earthquake and the 2011 earthquake off the Pacific coast of Tohoku, Japan.
These earthquakes triggered powerful tsunami waves and altered the topography of the ocean floor.
The Japan quake, for example, actually moved the island of Honshu to the east and even shifted the Earth on its axis.
This map will help you visualize the terrain of the ocean floor — a landscape normally hidden beneath the surface of the sea.
Seismologists today watch warily what is known as the Cascadia Subduction Zone — a long fault that stretches from Northern Vancouver Island to Cape Mendocino, California.
Should an earthquake occur there, a towering tsunami would sweep the Northwest coast with waves between 20 and 100 feet tall.
Condition:
This map is in
excellent condition
, bright and clean, with
no
marks, rips, or tears. Please see the scans and feel free to ask any questions.
This map was published as a supplement to the December 1981 issue of
National Geographic Magazine
.
On the reverse side there's a political map of the world, showing country names and boundaries as they existed when this map was printed, more than 40 years ago.
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