- Preceding something in time, development, or position; preliminary: precursory seismic activityMore example sentences
- This eruption began in July 1995 with phreatic explosions following 3 years of precursory seismic activity.
- Steven Soter, an astronomer in the Museum's Department of Astrophysics, is researching seismic precursory phenomena and the geoarchaeology of ancient Helike, a Greek city destroyed by an earthquake in 373 B.C.
- The activity observed in 1994 occurred largely at the site of the 1998 eruption and may have indicated precursory volcanic activity at a site on the brink of an eruption.
late 16th century: from Latin praecursorius, from praecurs- 'preceded' (see precursor).