Japan Geoscience Union Meeting 2018

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[EJ] Oral

S (Solid Earth Sciences) » S-SS Seismology

[S-SS09] Crustal Deformation

Sun. May 20, 2018 1:45 PM - 3:15 PM Convention Hall B (CH-B) (2F International Conference Hall, Makuhari Messe)

convener:Tadafumi Ochi(Institute of Earthquake and Volcano Geology, Geological Survey of Japan, The National Institute of Advanced Industrial Science and Technology), Mako Ohzono(Institute of Seismology and Volcanology, Graduate School of Science, Hokkaido University), Chairperson:Yamasaki Tadashi, Mitsui Yuta

3:00 PM - 3:15 PM

[SSS09-06] Current deformation in South Sumatra - Java and its implications for earthquake hazards

*Irwan Meilano1, S. Susilo2, Endra Gunawan1, Henri Kuncoro1, Bambang Setyadji1, Dina Sarsito1, Rahma Hanifa1, Hasanuddin Abidin1 (1.Institut Teknologi Bandung - Indonesia, 2.Geospatial Information Agency - Indonesia)

Keywords:Crustal Deformation, Sumatra - Java, Earthquake hazards

The distribution of deformation in South Sumatra and Java Islands is determined from the GPS Network Operations Reference 2010-2017 (InaCORS). The GPS analysis shows that the current deformations in South Sumatra and the Java Islands are controlled by the rotation of Sunda land, the extension in the southern Sunda Strait, postseismic deformation occurred in the 2006 earthquake and the incorporation of the Indo-Australian plate and Sunda land. The results of the strain analysis show compression in the southern part of Java Island. Using an elastic dislocation model, the estimated interplate coupling in the Sunda Strait and the Java trench is about 50-80 percent. The slip deficit at this subduction interface has important implications for earthquake hazards in South Sumatra and the Java Islands.