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High Resolution 1:10,000 scale Mapping Strategy of Multi ... - NDMA

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EARTHQUAKE HAZARD ESTIMATE<br />

ISOSIESMALS – INTENSITY DISTRIBUTION OF EARTHQUAKE<br />

AWAY FROM EPICENTER<br />

In seismology an isoseismal map is used to show lines <strong>of</strong> equal felt seismic intensity,<br />

generally measured on the modified mercalli <strong>scale</strong>. Such maps help to identify<br />

earthquake epicenters, particularly where no instrumental records exist, such as for<br />

historical earthquakes. They also contain important information on ground conditions<br />

at particular locations, the underlying geology, and radiation pattern <strong>of</strong> the seismic<br />

waves and the response <strong>of</strong> different types <strong>of</strong> buildings. They form an important part<br />

Figure App 4.4: Pattern <strong>of</strong> seismic waves<br />

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