Now showing items 1-20 of 25

    • Sáez, Miguel; Ruiz Tapia, Sergio (Amer Geophysical Union, 2018)
      T phases from 54 South American earthquakes with M-w > 5.2 are observed at a broadband station on Juan Fernandez Island. We computed the T phase energy flux (TPEF) values of the seismograms. The TPEF values show a large ...
    • Fernández, José; Pastén, César; Ruiz Tapia, Sergio; Leyton, Felipe (Springer Netherlands, 2019)
      © 2018, Springer Nature B.V.Destructive megathrust earthquakes, such as the 2015 Mw 8.3 Illapel event, frequently affect Chile. In this study, we assess the damage of the 2015 Illapel Earthquake in the Coquimbo Region ...
    • Pastén Puchi, César; Salomón, José; Sáez, Miguel; Ruiz Tapia, Sergio; Leyton, Felipe (ICSMGE, 2017)
      Evaluation of the seismic response of the Santiago Basin requires a shear wave velocity model with vertical and lateral variations that may explain the site effects reported during the 2010 Maule Earthquake. In order to ...
    • León Ríos, Sergio; Ruiz Tapia, Sergio; Maksymowicz, Andrei; Leyton, Felipe; Fuenzalida, Amaya; Madariaga, Raúl (Springer, 2016)
      We study the foreshocks and aftershocks of the 1 April 2014 Iquique earthquake of Mw 8.1. Most of these events were recorded by a large digital seismic network that included the Northern Chile permanent network and up to ...
    • Herrera Ramírez, Carlos; Ruiz Tapia, Sergio; Madariaga, Raúl; Poli, Piero (Oxford University Press, 2017-05)
      We study the seismic source of the 2015 (M-w 6.7) Jujuy, Argentina intermediate depth earthquake. We first constrain the fault plane by using a teleseismic inversion and by determining the aftershock distribution. Then, ...
    • Madariaga, Raúl; Ruiz Tapia, Sergio (Springer, 2016)
      We review the development of earthquake dynamics taken from the point of view of the origin of seismic radiation instead of the detailed study of rupture propagation on complex surfaces. Many features of seismic radiation ...
    • Carrasco, Sebastián; Ruiz Tapia, Sergio; Sáez, Miguel (Seismological Society of America, 2020)
      The Juan Fernandez Islands (JFI) are located in the Pacific Ocean 675 km west of the Chilean coast. This archipelago has historically been affected by large tsunamis. Robinson Crusoe Island (RCI), the main island of the ...
    • Leyton, F.; Pastén Puchi, César; Ruiz Tapia, Sergio; Idini, B.; Rojas Barrales, Fabián (Seismological Society of America, 2018)
      The National Seismological Center of the University of Chile (CSN, Centro Sismologico Nacional) has been operating more than 400 seismic stations throughout the country. The data collected from this network, from March ...
    • Pasten-Araya, F.; Salazar, P.; Ruiz Tapia, Sergio; Rivera, E.; Potin, B.; Maksymowicz, A.; Torres, E.; Villarroel, J.; Cruz, E.; Valenzuela, J.; Jaldín, D.; González, G.; Bloch, W.; Wigger, P.; Shapiro, S. (Blackwell Publishing Ltd, 2018)
      The plate interface beneath the Mejillones Peninsula in Northern Chile is characterized by anomalous seismogenic behaviors, with seismic and aseismic slip, and low coupling values. We analyze this zone through the ...
    • Leyton, F.; Ruiz Tapia, Sergio; Madariaga, R. (Seismological Soc Amer, 2018)
      Nowadays, most fast, automatic algorithms estimate the magnitude and location of earthquakes assuming a point-source approximation that might produce large errors in the predicted shaking. In this study, using a kinematic ...
    • Leyton, F.; Leopold, A.; Hurtado, G.; Pastén, C.; Ruiz Tapia, Sergio; Montalva, G.; Saéz, E. (Seismological Soc Amer, 2018)
      The Chilean Seismological Network has been rapidly growing in recent years, going from a few dozens stations working before 2010 to nearly a 100 installed all over the territory. Even more, nearly 300 strong-motion stations ...
    • Maksymowicz, Andrei; Ruiz, Javier; Vera, Emilio; Contreras-Reyes, Eduardo; Ruiz Tapia, Sergio; Arraigada, César; Bonvalot, Sylvain; Bascuñan, Sebastián (Oxford University Press, 2018)
      Recent studies have proposed that nucleation zones, seismic barriers and high-slip patches of megathrust earthquakes correlate with physical heterogeneities, both in the oceanic/subducting plate and in the continental ...
    • Ruiz Tapia, Sergio; Madariaga, R. (Elsevier, 2018-05)
      Recent earthquakes in Chile, 2014, Mw 8.2 Iquique, 2015, Mw 8.3 Illapel and 2016, Mw 7.6 Chiloe have put in evidence some problems with the straightforward application of ideas about seismic gaps, earthquake periodicity ...
    • Leyton, F.; Ruiz Tapia, Sergio; Baez, J.; Meneses, G.; Madariaga, R. (Blackwell Publishing Ltd, 2018)
      Fast and reliable characterization of earthquakes can provide vital information to the population, even reducing the effects of strong shaking produced by them. In this study, we explore the minimum time required to estimate ...
    • Madariaga, Raul; Ruiz Tapia, Sergio; Rivera, Efrain; Leyton, Felipe; Baez, Juan Carlos (Birkhauser Verlag AG, 2019)
      © 2018, Springer Nature Switzerland AG.We have studied the spectra of large subduction earthquakes in Chile at short epicentral distances. In this work, we concentrate on the Mw 8.2, Iquique earthquake of 1 April 2014. For ...
    • Ruiz Tapia, Sergio; Moreno, M.; Melnick, D.; Campo, F. del; Poli, P.; Baez, J. C.; Leyton, F.; Madariaga, R. (American Geophysical Union, 2017)
      On 25 December 2016, the M-w 7.6 Chiloe earthquake broke a plate boundary asperity in south central Chile near the center of the rupture zone of the Mw 9.5 Valdivia earthquake of 1960. To gain insight on decadal-scale ...
    • Ojeda, Javier; Ruiz Tapia, Sergio (Copernicus Gesellschaft MBH, 2021)
      On 3 March 2020, the first case of COVID-19 was confirmed in Chile. Since then, the Ministry of Health has imposed mobility restrictions, a global policy implemented to mitigate the propagation of the virus. The national ...
    • Ammirati, Jean-Baptiste; Flores, M. Constanza; Ruiz Tapia, Sergio (Elsevier, 2020)
      The Magallanes-Fagnano fault (at similar to 51-56 degrees S) is a continental NW-SE transform fault zone that marks the boundary between the South American Plate (north) and the Scotia Plate (South). In 1949, two crustal ...
    • Inzunza, Diego A.; Montalva, Gonzalo A.; Leyton, Felipe; Prieto, German; Ruiz Tapia, Sergio (Seismological Society of America, 2019)
      Forecasting surface seismic intensities is the main objective of much of the research in seismic engineering. The seismic demand for tall buildings, bridges, wind farms, and other existing slender structures is predominantly ...
    • Otárola Bravo, Cristián; Ruiz Tapia, Sergio (Seismological Society of America, 2016)
      The generation of accelerograms using stochastic methods has been a very useful methodology for solving the problem of the lack of appropriate strong-motion records for seismic design. Here, we propose the generation of ...