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Integrated geophysical measurements for subsurface mapping at Papandayan volcano, Garut, Indonesia (preliminary result)
Nurhasana, Sutarno D.a, Srigutomo W.a, Viridi S.a, Fitriani D.b
a Physics Department, Bandung Institute of Technology, Indonesia
b Physics Department, Padjadjaran University, 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]Papandayan volcano is an active volcano situated in Garut, West Java Indonesia. In 2002 eruption, it released pyroclastic volcanic material to the surface covering the 4 km2 area on the summit to the north part of the volcano and formed new craters on the summit. We have undertaken several geophysical measurements in period of 2008 – 2011 including magnetotelluric, gravity, magnetic and DC resistivity in order to delineate subsurface structure of the volcano. Magnetotelluric measurement was designed using a grid system with the 30 sites and interval station of approximately 250m covering the summit area. Frequency range from 320 Hz to 1 HZ were used in MT measurement by recording two components of electric and magnetic fields using phoenix MTU-5 system. Magnetic and gravity data were acquired in the summit area overlapping with the MT survey to determine basement of the volcano structure. The shallow resistivity structure was constrained by two lines DC resistivity survey that was carried out in east-west direction located in the center of the summit to confirm the thickness of pyroclastic distribution released from 2002 eruption. The MT result derived from 3D inversion shows that the resistive zone of deep structure with the circle-like shape exists in the middle of the model in coincidence with the location of new craters. A comparison of low total magnetic field appear to be consistent with the circle-like shaped resistive zone presumably related to high temperature distributed in center of the region. From gravity data, we have found the basement of the pyroclastic structure. © 2012 American Institute of Physics.[/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]DC resistivity,Gravity method,Magnetic method,Magnetotelluric methods (MT),Papandayan Volcano[/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/10.1063/1.4730710[/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]