isoseismal


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isoseismal

[¦ī·sə′sīz·məl]
(geophysics)
Pertaining to points having equal intensity of earthquake shock, or to a line on a map of the earth's surface connecting such points.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Based on DIM, a mathematical interpolation method has been proposed to draw isoseismal line by using these discrete intensity values.
Although isoseismal line has realized the conversion from discrete intensity values to continuous ones, however, it is still discrete between the lines.
Time (U.T.) Latitude Longitude Date hr:min:sec [degrees]N [degrees]W May 22,1817 7:45 45.0 67.2 February 08, 1855 7:03 46.0 64.5 October 22, 1869 9:55 46.5 67.0 March 21, 1904 6:04 45.0 67.2 July 2, 1922 9:22 46.5 66.6 September 30, 1937 7:58:10 47.4 66.3 Felt area Isoseismal IV Date magnitude (1) magnitude (1) May 22,1817 4.6 5.4 February 08, 1855 4.8 5.4 October 22, 1869 5.3 6.0 March 21, 1904 5.3 6.0 July 2, 1922 4.7 5.4 September 30, 1937 4.5 * -- Date Su Sub-zone May 22,1817 Passamaquoddy Bay February 08, 1855 Moncton region October 22, 1869 Central Highlands March 21, 1904 Passamaquoddy Bay July 2, 1922 Central Highlands September 30, 1937 Central Highlands Notes: (1) Values determined by relationships between magnitude and felt area (Burke 2009).