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| 2014 Iquique earthquake | |
|---|---|
| Name | 2014 Iquique earthquake |
| Native name | Terremoto de Iquique de 2014 |
| Date | 2014-04-01 |
| Time | 20:46:47 UTC |
| Magnitude | 8.2 M_w |
| Depth | 25 km |
| Epicenter | off the coast of Iquique, Chile |
| Countries affected | Chile, Peru, Bolivia, Argentina |
2014 Iquique earthquake
The 2014 Iquique earthquake struck off the coast of northern Chile on 1 April 2014, producing a moment magnitude of 8.2 and triggering a multi-wave tsunami that affected the Pacific basin. The event occurred near the city of Iquique and generated widespread seismic, social, and diplomatic activity involving institutions such as the Servicio Sismológico de la Universidad de Chile, the United States Geological Survey, the International Tsunami Information Center, and regional authorities including the Onemi. The earthquake highlighted the seismic hazard along the Peru–Chile Trench and prompted responses from national militaries, humanitarian agencies, and scientific networks like the Global Seismographic Network.
The earthquake occurred along the convergent plate boundary where the Nazca Plate subducts beneath the South American Plate at the Peru–Chile Trench. The region has produced historic megathrust earthquakes including the 1868 Arica earthquake, the 1877 Iquique earthquake, and the 1960 Valdivia earthquake, the latter being the largest instrumentally recorded earthquake. Northern Chile lies within a seismic gap that had been identified by researchers from institutions such as the University of Chile, the California Institute of Technology, and the National Oceanic and Atmospheric Administration as posing potential rupture risk. Geophysical studies by groups like the Geological Society of America and the Pan-American Institute of Geography and History have mapped the plate interface, indicating locked segments and slip deficit that informed seismic hazard models used by the Intergovernmental Panel on Climate Change-related coastal planning initiatives.
Seismological analyses by the United States Geological Survey and the Centro Sismológico Nacional reported a moment magnitude (M_w) of 8.2 with a shallow hypocenter. Waveform inversion and finite-fault modeling performed by teams at the GFZ German Research Centre for Geosciences, the Earthquake Research Institute (University of Tokyo), and the Instituto Geofísico del Perú indicated rupture propagated along a segment of the megathrust offshore of Iquique and Pisagua. The rupture exhibited heterogeneous slip, with maximum coseismic displacement concentrated in discrete patches similar to patterns documented for the Mw 8.8 2010 Chile earthquake. Strong-motion recordings were analyzed by the Pacific Northwest Seismic Network and the Institute of Engineering, UNAM, while geodetic data from GPS stations operated by the Scripps Institution of Oceanography and the Comisión Nacional de Investigación Científica y Tecnológica resolved coseismic deformation.
The event caused deaths, injuries, and structural damage across the Tarapacá Region and affected cities including Iquique, Alto Hospicio, and Arica. Hospitals such as the Hospital Regional de Iquique and public services coordinated with the Armada de Chile and the Fuerza Aérea de Chile for evacuations. Infrastructure damage included collapsed buildings, damaged port facilities in Iquique Port, and disruptions to the Pan-American Highway and rail lines managed by companies like Empresa de los Ferrocarriles del Estado. Mining operations of firms including CODELCO, Antofagasta PLC, and regional contractors reported inspections and temporary halts at sites near Pampa del Tamarugal. Economic impacts were assessed by the Banco Central de Chile and insurance entities such as the Compañía de Seguros industry, which coordinated with municipal authorities.
A tsunami advisory and subsequent evacuation orders were issued by the Onemi and the Centro de Alerta de Tsunamis del Pacífico. Sea-level disturbances were recorded by tide gauges operated by the National Oceanic and Atmospheric Administration, the Servicio Hidrográfico y Oceanográfico de la Armada de Chile (SHOA), and the Pacific Tsunami Warning Center. Coastal towns including Iquique, Pisagua, and northern Peruvian ports such as Paita and Sechura observed inundation, harbor damage, and stranded vessels. International monitoring by the Japan Meteorological Agency and the French Research Institute for Exploitation of the Sea (IFREMER) contributed to wave modeling, while local fishermen's cooperatives and port authorities coordinated immediate responses.
Chile's national response involved coordination among the Onemi, the Ministerio del Interior y Seguridad Pública (Chile), the Defensa Civil de Chile, and the Armada de Chile for search, rescue, and humanitarian logistics. Evacuation orders affected tens of thousands, with shelters established by municipal governments and non-governmental organizations including the Cruz Roja Chilena and international NGOs like Médecins Sans Frontières and the International Federation of Red Cross and Red Crescent Societies. Reconstruction efforts mobilized regional planning bodies, the Ministerio de Vivienda y Urbanismo (Chile), and engineering teams from the Universidad de Chile and the Pontifical Catholic University of Chile to assess building codes and retrofit needs. Restoration of critical infrastructure involved utilities regulated by the Superintendencia de Servicios Sanitarios and transport agencies.
The mainshock was followed by a sequence of aftershocks monitored by the Centro Sismológico Nacional and global networks including the Incorporated Research Institutions for Seismology (IRIS). Notable aftershocks reached magnitudes above 6.0, prompting additional evacuations and inspections of structures and tailings facilities associated with mining companies. Seismologists from institutions such as the Massachusetts Institute of Technology and the University of California, Berkeley analyzed temporal decay of aftershock rates, stress transfer, and implications for adjacent segments of the trench, informing early-warning improvements by agencies like the Japan Agency for Marine-Earth Science and Technology.
Regional governments of Peru, Bolivia, and Argentina coordinated consular assistance and monitoring through their foreign ministries and disaster agencies, while international bodies including the United Nations Office for the Coordination of Humanitarian Affairs (OCHA) and the Inter-American Development Bank offered technical and financial support. Bilateral offers of aid arrived from countries such as the United States, Japan, and Brazil, with specialized teams from the Federal Emergency Management Agency (FEMA) and the European Union Civil Protection Mechanism providing expertise in tsunami response and infrastructure assessment. Scientific collaboration intensified among oceanographic and seismological institutions to improve regional resilience and early-warning systems for future megathrust events.
Category:2014 earthquakes Category:Earthquakes in Chile Category:Tsunamis in Chile