2000 Volume 109 Issue 6 Pages 971-982
Continuous measurement using dense permanent GPS array plays an important role in monitoring crustal deformations to understand tectonics of the region and mechanisms of earthquakes and volcanic eruptions. Since 1994, a nationwide GPS array of the Geographical Survey Institute detected a variety of crustal deformations caused by the plate motion, earthquakes and volcanic eruptions. In addition, interesting transient phenomena have been observed by continuous GPS. In this paper we discuss impacts of continuous GPS measurement on seismological and volcanological studies.