Definition of coseismal in English:



  • Relating to or denoting points on the earth's surface affected by an earthquake simultaneously.

    • ‘The field oscillation measurements allow to discover coseismal, near seismic and pre-seismic electromagnetism.’
    • ‘Several of Bull's research sites are within Sequoia and Kings Canyon National Parks since they are close enough to the San Andreas Fault for coseismal rock falls.’
    • ‘The purpose of the coseismal curves based upon these records is in general two - fold.’


  • A line on a map connecting coseismal points.

    • ‘The rupture has declared itself in an unmistakable rift observable at the surface, and coseismals are therefore unnecessary for the determination if this important factor.’


Mid 19th century: from co- ‘jointly’ + seismal (from Greek seismos ‘earthquake’, from seien ‘to shake’).