Isoseismal map: Difference between revisions

In [[seismology]], an '''isoseismal map''' is used to show [[Contour line|countour lines]] of equally felt seismic intensity, generally measured on the [[Modified Mercalli scale]]. Such maps help to identify [[earthquake]] [[epicenter]]s, particularly where no [[seismometer|instrumental]] records exist, such as for [[historical earthquakes]]. They also contain important information on ground conditions at particular locations, the underlying [[geology]], radiation pattern of the [[seismic wave]]s, and the response of different types of buildings. They form an important part of the macroseismic approach, i.e. that part of seismology dealing with noninstrumental data. The shape and size of the isoseismal regions can be used to help determine the [[Seismic scale#Magnitude scales|magnitude]], [[Focus (earthquake)|focal]] depth, and [[focal mechanism]] of an earthquake.<ref name ="Musson"/><ref name ="Linkimer"/>