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Keep "coseismal" when the sentence already sounds natural, when a synonym would add unintended emphasis, or when readers need the most familiar wording. A synonym should clarify or sharpen the message, not simply make the sentence look more varied.
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Review note: Synonym lists are ranked with lexical data and reviewed for practical writing value. Use the comparison notes, sentence evidence, and source labels together; a high-ranking synonym can still be wrong when the audience, register, or grammar changes.
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3 total sentences available.
As illustrative of what would occur under the supposed conditions Dr. Schmidt gives a diagram like fig. 32, in which coseismals have been drawn on the assumption that the velocity has increased proportionately with the depth. In this case the earthquake rays, which are perpendicular to successive coseismals, are by refraction turned upwards, and no longer radiate in straight lines.
Source: wiktionary
The Central Meteorological Observatory has tentatively placed the epicentre at 144.°6 E, 39.°2 N — a result worked out from the coseismals, which were deduced from the times of beginning of the shock at the different meteorological stations.
Source: wiktionary
Now, the average distance between the two inner coseismals is 32 3/4 miles, between the two outer ones (so far as drawn) 35 1/6 miles, and between the first and third 67 1/6 miles.
Source: wiktionary
Closest matches include coseismic.
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