High stress drops of short-period subevents from the 1968 Tokachi-Oki earthquake as observed on strong-motion records
- 1 October 1984
- journal article
- Published by Seismological Society of America (SSA) in Bulletin of the Seismological Society of America
- Vol. 74 (5) , 1529-1544
- https://doi.org/10.1785/bssa0740051529
Abstract
Strong-motion records of the 1968 Tokachi-Oki earthquake were examined, and two very high stress drop subevents were identified. The first subevent had been previously located by Nagamune (1969), and the second subevent was located in this study using P waves recorded on short-period WWSSN records. Estimates of source parameters revealed small source dimensions ( The two subevents also produced the dominant accelerations on the strong-motion records, and it is shown that high-peak accelerations (150 to 200 cm/sec2) were recorded even at relatively large distances (100 to 200 km).Keywords
This publication has 11 references indexed in Scilit:
- Short- and long-period subevents of the 4 February 1965 Rat Islands earthquakeBulletin of the Seismological Society of America, 1984
- The rupture process and asperity distribution of three great earthquakes from long-period diffracted P-wavesPhysics of the Earth and Planetary Interiors, 1983
- Investigation of two high stress drop earthquakes in the Shumagin Seismic Gap, AlaskaJournal of Geophysical Research, 1980
- Characterization of barriers on an earthquake faultJournal of Geophysical Research, 1979
- Foreshocks and multiple shocks of large earthquakesPhysics of the Earth and Planetary Interiors, 1975
- Source mechanism of February 4, 1965, Rat Island earthquakeJournal of Geophysical Research, 1973
- Possible criteria for predicting earthquake locations and their application to major plate boundaries of the Pacific and the CaribbeanJournal of Geophysical Research, 1973
- Focal mechanism of the Tokachi-Oki earthquake of may 16, 1968: Contortion of the lithosphere at a junction of two trenchesTectonophysics, 1971
- Travel Time Tables for Local Earthquakes In and Near JapanPapers in Meteorology and Geophysics, 1971
- Tectonic stress and the spectra of seismic shear waves from earthquakesJournal of Geophysical Research, 1970