E. Krismanto, P. Ariyanto, Ilham
Maluku Islands is an area with relatively high seismic activity it is the meeting area of three plates: Indo-Australia, Eurasia, and the Philippines. One of the earthquake sources in Maluku is the Seram Trough subductions zone, located north of Seram and Buru Islands. This study proposes to determine the depth of the Moho discontinuity and slab subduction, the velocity model of P and S wave and the vp/vs ratio on Seram and Buru Islands using the receiver function from teleseismic earthquake P wave recorded by four broadband three components sensors of the BMKG network (Indonesia Agency for Meteorology, Climatology, and Geophysics). The depth of the moho discontinuity on Seram Island was identified at depth between 22-42 km, and on Buru Island at depth 30-40 km. Based on the cross section analysis of the results of the receiver function migration results into depth domain, the depth of the slab on Buru Island was identified at a depth of 40-100 km. The P and S wave velocity models on Seram and Buru Islands vary, with low velocity zone at the AAII station due to geothermal field activity in the east of Ambon Island. © Published under licence by IOP Publishing Ltd.
Indonesia Agency for Meteorology Climatology and Geophysical, Indonesia; Indonesia State College for Meteorology Climatology and Geophysical, Indonesia; Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Brawijaya, Malang, 65145, Indonesia
