1984 Northern Sumatra earthquake
Megathrust | |
| Areas affected | Indonesia |
|---|---|
| Max. intensity | MMI VII (Very strong)[1] |
| Casualties | 1 injured [1] |
The 1984 Northern Sumatra earthquake occurred with a
Tectonic setting
The island of Sumatra lies on the
2000 and 2002.[4] The deformation velocity in the offshore Sumatra fore-arc region is estimated to be 19 mm/yr along N45° near the equator, with compression being the dominant deformation.[5]
The 1984 earthquake occurred in the same gap as the 1935 event.
Characteristics
The earthquake was caused by a rupture of the subduction interface. The focal depth was about 27 km and the fault plane dipped at 12°. This earthquake contained mainly a down-dip convergence but also a right-lateral displacement.[3]
See also
References
- ^ a b USGS. "M 7.1 - Nias region, Indonesia". United States Geological Survey.
- ^ USGS (2010). "Significant Earthquakes of the World 1984". Archived from the original on 2009-12-04.
- ^ .
- hdl:10220/8480.
- ^ Lasitha, S.; Radhakrishna, M.; Sanu, T. D. (2006), "Seismically active deformation in the Sumatra–Java trench-arc region: geodynamic implications" (PDF), Current Science, 90 (6): 690–696
External links
- The International Seismological Centre has a bibliography and/or authoritative data for this event.