RT journal article
T1 Detection and study of a high magnitude seismic event from GPS data: Case study of the 2011 Tohoku-Oki earthquake
A1 Cibeira Urtiaga, Ángel
A1 Berrocoso Domínguez, Manuel
A1 Rosado Moscoso, Belén
A1 Pazos, Antonio
A2 Matemáticas
K1 Seismogeodesy
K1 gps
K1 Tohoku-Oki
K1 Geodesy
AB The advent of GPS provided a new way of measuring surface displacements due to earthquakes by deploying GPSnetworks within active seismic areas. Japan is located in the confluence of several tectonic plates, hence its seismicity.In order to surveille this activity, one of wider GPS network in the world was deployed, i.e., GEONET. By processingdata from 93 GEONET reference stations, we analyze the 2011 Tohoku-Oki earthquake using PPP strategy. We stu-died the time series during the event setting up a threshold value at we consider the time series are being altered bythe earthquake. We also identified the time after the occurrence when the maximum displacements happen. With thestudy of these two parameters, we aim to show their different behavior as the main shock propagates along the Japanislands, with a focus on a better understanding of the earthquake and its propagation. To achieving this, a least squareadjustment method was used to relate epicentral distance to topocentric displacements and the time of detection toepicentral distance. The results show an exponential behavior of the distance-displacement regression versus a linearbehavior of the distance-time regression. Besides, we use the former linear regression to calculate and approximationof the velocity of the shock waves
PB UNIV NACIONAL DE COLOMBIA
SN 2339-3459
YR 2022
FD 2022-06
LK http://hdl.handle.net/10498/28472
UL http://hdl.handle.net/10498/28472
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 07-nov-2026