[vc_empty_space][vc_empty_space]
Seismic tomography imaging beneath Sinabung Volcano, North Sumatra Area, Indonesia
Aulia A.N.a, Nugraha A.D.a, Indrastuti N.b, Gunawan H.b
a Geophysical Engineering, Faculty of Mining and Petroleum Engineering, Institute of Technology Bandung, Indonesia
b Center for Volcanology and Geology Hazard Mitigation (CVGHM), Bandung, Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]The Sinabung volcano is located in Karo Regency, North Sumatra with altitude of 2460 m above sea level. Since the sudden eruption in 2010, Sinabung volcano, which is previously a volcano type B, turned into a volcano type A. Variations in the seismic velocity and earthquake hypocenter distribution can be determined using the Local Earthquake Tomography (LET) to well-describe the subsurface structures. We selected 2, 105 volcano-tectonic (VT) event from data catalog of CVGHM from November until December 2013. Updates 1-D initial velocity model for P and S wave were conducted by Joint Hypocenter Determination (JHD) method and then used as input for LET to determine 3-D Vp and Vp/Vs structures. Based on the checkerboard resolution test, seismic velocity structures are reliably imaged only about 1 km around the summit down to depths of about 4 km beneath Sinabung volcano due to the VT events seem clustered at that depth and the lack of stations. The tomographic inversion results showed anomalous of low Vp, Vs, and Vp/Vs around Sinabung Volcano may be related to the presence of a weak zone or crack filled by the hot material, CO2, and steam. The low Vp and Vs anomalies, and high Vp/Vs ratio value coincide with aseismic zone that was identified at a depths of 1-2 km beneath Sinabung volcano may be associated with the intermediate partial melting zone, which may cause Sinabung volcano is very active until now.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1063/1.4987091[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]