The Japan Meteorological Agency has a unique seismic scale called shindo that measures the degree of shaking in the. Earthquake distribution around Japan 1960-2011 Monitoring of Earthquakes and Provision of Information To. Tables explaining the JMA Seismic Intensity Scale Contents Notes Human perception and reaction indoor. Notes on using JMA seismic intensity data. J-SHIS was established to help prevent and prepare for earthquake disaster by providing a public portal for seismic..
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Major damage to buildings and structures likely to be destroyed Will cause moderate to heavy damage to sturdy or earthquake-resistant buildings. There is not one magnitude above which damage will occur It depends on other variables such as the distance from the earthquake what type of soil you are on building construction etc. Often felt but only causes minor damage Slight damage to buildings and other structures May cause a lot of damage in very populated areas. Richter scale of earthquake magnitude magnitude level category effects earthquakes per year less than 10 to 29 micro generally not felt by people though recorded on local. Public domain The time location and magnitude of an earthquake can be determined from the data recorded by seismometer Seismometers record the vibrations from earthquakes that travel..
The Richter scale 1 ˈrɪktər also called the Richter magnitude scale Richters magnitude scale and the GutenbergRichter scale 2 is a measure of the strength of earthquakes. Richter scale M L quantitative measure of an earthquakes magnitude size devised in 1935 by American seismologists Charles F. An earthquake has one magnitude unit The magnitude does not depend on the location where the measurement is made Since 1970 the Moment Magnitude Scale has been used. An earthquakes seismic moment can be estimated in various ways which are the bases of the Mwb Mwr Mwc Mww Mwp Mi and Mwpd scales all subtypes of the generic M w scale. Magnitude is expressed in whole numbers and decimal fractions For example a magnitude 53 is a moderate earthquake and a 63 is a strong earthquake..
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All scales except M w saturate for large earthquakes meaning they are based on the amplitudes of waves that have a wavelength shorter than the rupture. The 20 largest recorded earthquakes in history 1 Wrecked houses in Valdivia Chile after the 1960. Richter scale ML quantitative measure of an earthquake s magnitude size devised in 1935. Largest earthquakes by year 1938 Banda Sea earthquake A tsunami up to 2 meters high was generated without major damage. With an isoseismal map of the observed intensities see illustration an earthquakes magnitude can be estimated from both the maximum..
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