TY - JOUR
T1 - Analysis of submarine landslide potential that can trigger tsunami based on seismic reflection interpretation
AU - Yazida, D. M.
AU - Supriyanto, null
AU - Priyanto, W. S.
N1 - Funding Information:
Authors would like to thank Research Center for Geotechnology of the Indonesian Institute of Sciences (LIPI) for providing the seismic and bathymetry data. We also thank Geospatial Information Agency for providing the open access bathymetry data. This project was supported by the PUTI Saintekes 2020 research programme under the Universitas Indonesia grant agreement with contract number NKB-4879/UN2.RST/HKP.05.00/2020.
Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2021/10/4
Y1 - 2021/10/4
N2 - The megathrust at the west part of Sumatera can produce a lot of earthquakes. Several earthquakes in Sumatera that occurred from 2004 to 2007 raised tsunami with various heights. The high tectonic activity in this area can trigger landslides in the ocean which may lead to tsunami. Therefore, research about seabed landslides needs to be done in this zone. The study identified the seabed geological structure from 2D seismic section in the east part of Siberut Island. The seismic section was generated from seismic processing of Seismic Line-05 (AA'). The seismic data were acquired using LIPI Baruna Jaya VIII research vessel on the Pre-Tsunami Investigation of Seismic Gap (PreTI-Gap) marine expedition in 2008. Seismic section interpretation shows the presence of backthrust on this seismic line. The bathymetry data from the Geospatial Information Agency and marine survey are used to make bathymetry map, bathymetry charts, and slope map. Analysis using 2D seismic section, bathymetry data, and slope map shows the steep zones at 3-5 km and at 15-16 km from the south west edge of Seismic Line-05 (AA') with 180 m and 300 m bathymetry drop, respectively. These steep zones must be watched because they can trigger submarine landslides and tsunami.
AB - The megathrust at the west part of Sumatera can produce a lot of earthquakes. Several earthquakes in Sumatera that occurred from 2004 to 2007 raised tsunami with various heights. The high tectonic activity in this area can trigger landslides in the ocean which may lead to tsunami. Therefore, research about seabed landslides needs to be done in this zone. The study identified the seabed geological structure from 2D seismic section in the east part of Siberut Island. The seismic section was generated from seismic processing of Seismic Line-05 (AA'). The seismic data were acquired using LIPI Baruna Jaya VIII research vessel on the Pre-Tsunami Investigation of Seismic Gap (PreTI-Gap) marine expedition in 2008. Seismic section interpretation shows the presence of backthrust on this seismic line. The bathymetry data from the Geospatial Information Agency and marine survey are used to make bathymetry map, bathymetry charts, and slope map. Analysis using 2D seismic section, bathymetry data, and slope map shows the steep zones at 3-5 km and at 15-16 km from the south west edge of Seismic Line-05 (AA') with 180 m and 300 m bathymetry drop, respectively. These steep zones must be watched because they can trigger submarine landslides and tsunami.
KW - Seismic
KW - submarine landslide
KW - tsunami
UR - http://www.scopus.com/inward/record.url?scp=85117881500&partnerID=8YFLogxK
U2 - 10.1088/1755-1315/846/1/012013
DO - 10.1088/1755-1315/846/1/012013
M3 - Conference article
AN - SCOPUS:85117881500
SN - 1755-1307
VL - 846
JO - IOP Conference Series: Earth and Environmental Science
JF - IOP Conference Series: Earth and Environmental Science
IS - 1
M1 - 012013
T2 - 4th Life and Environmental Sciences Academics Forum, LEAF 2020
Y2 - 6 November 2020 through 7 November 2020
ER -
