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The Chile-2015 (Illapel) Earthquake and Tsunami pp 1–9Cite as

Birkhäuser

A Review of Source Models of the 2015 Illapel, Chile Earthquake and Insights from Tsunami Data

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Abstract

The 16 September 2015 Illapel, Chile, earthquake and associated tsunami have been studied by many researchers from various aspects. This paper reviews studies on the source model of the earthquake and examines tsunami data. The Illapel earthquake occurred in the source region of previous earthquakes in 1943 and 1880. The earthquake source was studied using various geophysical data, such as near-field seismograms, teleseismic waveform and backprojection, GPS and InSAR data, and tsunami waveforms. Most seismological analyses show a duration of ~100 s with a peak at ~50 s. The spatial distribution has some variety, but they all have the largest slip varying from 5 to 16 m located at 31°S, 72°W, which is ~70 km NW of the epicenter. The shallow slip seems to be extended to the trench axis. A deeper slip patch was proposed from high-frequency seismic data. A tsunami earthquake model with a total duration of 250 s and a third asperity south of the epicenter is also proposed, but we show that the tsunami data do not support this model.

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Acknowledgements

We thank Alexander Rabinovich (Editor-in-Chief) for inviting us to contribute this review article. Tsunami data are downloaded from the sea-level station monitoring facility of Intergovernmental Oceanographic Commission (IOC) of UNESCO at: http://www.ioc-sealevelmonitoring.org/. Some figures are drafted using the GMT software of Wessel and Smith (1998). DART data are provided by the National Oceanic and Atmospheric Administration (NOAA) of the United States (http://www.ndbc.noaa. gov/dart.shtml). This work was partially supported by KAKENHI (16H01838).

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Authors and Affiliations

  1. Earthquake Research Institute, The University of Tokyo, Tokyo, Japan

    Kenji Satake & Mohammad Heidarzadeh

  2. Port and Airport Research Institute, Yokosuka, Japan

    Mohammad Heidarzadeh

Authors
  1. Kenji Satake
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  2. Mohammad Heidarzadeh
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Correspondence to Kenji Satake .

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Editors and Affiliations

  1. Department of Mathematics and Geoscience, University of Trieste, Trieste, Italy

    Carla Braitenberg

  2. Department of Fisheries and Oceans, Institute of Ocean Sciences, Sidney, Canada

    Alexander B. Rabinovich

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Satake, K., Heidarzadeh, M. (2017). A Review of Source Models of the 2015 Illapel, Chile Earthquake and Insights from Tsunami Data. In: Braitenberg, C., Rabinovich, A. (eds) The Chile-2015 (Illapel) Earthquake and Tsunami. Pageoph Topical Volumes. Birkhäuser, Cham. https://doi.org/10.1007/978-3-319-57822-4_1

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