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isoseismal
isoseismal adj. and n. 
/ˌaɪsoʊˈsaɪzm(ə)l/ [Greek σεισμός earthquake] (a line on a map, etc.) connecting points at which the intensity of an earthquake-shock is the same.
Brit. /ˌʌɪsə(ʊ)ˈsʌɪzml/
, /ˌʌɪsə(ʊ)ˈsʌɪzml/U.S. /ˌaɪsəˈsaɪzm(ə)l/
, /ˌaɪsəˈsaɪzm(ə)l//ˌaɪsoʊˈsaɪzm(ə)l/ΘΚΠ
the world > the earth > earth sciences > geography > map-making > map > [noun] > line on map > geological features or phenomena
isoseismal1883
isobase1892
isopachyte1912
isovol1915
isopach1918
isograd1924
isochron1968
the world > the earth > earth sciences > geography > map-making > map > [adjective] > line on map > geological features or phenomena
isacoustic1842
isoseismal1883
isopachous1913
isograde1924
isogradic1924
1883 Nature 6 Sept. 437/2 Isoseismal lines over the injured districts..assume the form of elongated ellipsoids.
1887 Science (U.S.) 20 May 493/1 The relations of these isoseismals to each other.
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