earthquake是什么意思？

In just the past few weeks, the world has witnessed the destructive power of earthquakes in Indonesia, typhoons in the Philippines, and the destructive sea waves that struck Samoa and neighboring islands.

Some of them had once experienced an earthquake.

By noting where the most severe earthquake in U. S. history occurred.

Since he was speaking in the Midwest, he decided to begin by noting that the most severe earthquake in American history took place not in California or Alaska but at New Madrid, Missouri in 1811.

If such an earthquake happened today, it would be felt from the Rocky Mountains to the Atlantic Ocean and would flatten most of the cities in the Mississippi valley

By reflecting on Americans' previous failures in predicting earthquakes.

By describing the destructive power of earthquakes

Juan Louis, a junior geology major, decided to give an informative speech about how earthquakes occur.

As he prepared the speech, Juan kept asking himself, "How can I make this clear and meaningful to someone who knows nothing about earthquakes or geological principles

Throughout the body of the speech, Juan dealt only with the basic mechanics of the earthquakes and carefully avoid technical terms.

0-magiiitude earthquake and tsunami along one of the nation's dangerous—and underestimated—faults.

But what if the fault that runs along the Pacific Northwest delivers a gigantic earthquake of its own?

California has spent years preparing for "The Big One"—the inevitable earthquake that will undoubtedly unleash all kinds of havoc along the famous San Andreas fault (断层).

first, the earthquake would shake metropolitan areas including Seattle and Portland.

Megathrusts are created in earthquake zones-land plate boundaries where two plates converge.

Nearly 700 miles long, the earthquake zone is located by the North American Plate off the coast of Pacific British Columbia, Washington, Oregon and Northern California.

The Cascadia Earthquake Zone is big enough to compete with San Andreas it's been called the most dangerous fault in Americ, but it's much lesser known than its California cousin.

The Cascadia Rising drill gives area residents and emergency responders a chance to practice what to do in case of a 9.0-magnitude earthquake and tsunami along one of the nation’s dangerous—and underestimated—faults.

The last time a major earthquake occurred along the Cascadia fault was in 1700, so officials worry that another event could occur any time.