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It is not a matter of size: a tsunami is very different from an ordinary wave. A tsunami wave is not wind-driven but is usually caused by an earthquake or landslide. They have a much longer wavelength, and so carry far more water than an ordinary wave of similar height. In open ocean a tsunami may be a couple feet high an hundreds of miles long, becoming higher in the shallow water near shore. While a storm wave washes in and out in a matter of seconds, a tsunami comes in as a continuous surge for several minutes.

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Related Questions

What did the 2011 Japan earthquake measure on the Richter scale?

9.0


What scale is used to describe the strength of an earthquakes?

The scale used to measure the strength of an earthquake is called the Richter scale


What scale does Japan use to measure earthquakes?

Japan uses the Richter scale to measure earthquakes. This scale quantifies the energy released by an earthquake using a logarithmic scale from 1 to 10. In addition to the Richter scale, Japan also uses the Japan Meteorological Agency (JMA) seismic intensity scale to evaluate the intensity of shaking felt at specific locations.


Does the Richter scale measure how deep an earthquake is?

No. The Richter's scale measures the magnitude or intensity of an earthquake on a scale up to ten.


How much did the haiti earthquake measure on the Richter scale?

The Haiti earthquake measured around 7.0 on the Richter Scale.


How pwerful was the earthquake in Japan?

8.9 on the Richter scale.


What is used to measure earthquake strength?

richter scale


How strong was the japan 2011 earthquake?

9.1 on the Richter Scale.


What high was the 2011 japan earthquake in the Richter scale?

8.5


What did the Japan earthquake measure on the Richter scale?

The March 11, 2011 earthquake was originally measured at magnitude 8.9, but later upgraded to 9.0 by both USGS and Japan scientists.


Why did Charles Richter invent the Richter scale?

Charles Richter made it so it can measure the size of an earthquake.


What scale does PAGASA used to measure the intensity of an earthquake?

PAGASA (Philippine Atmospheric, Geophysical and Astronomical Services Administration) uses the Richter scale to measure the intensity of earthquakes. This scale is a logarithmic scale that quantifies the energy released by an earthquake.