Performance and Future Development of the Chilean Seismic Network

Date: 4/26/2019

Time: 06:00 PM

Room: Grand Ballroom

The National Seismological Center (CSN) of the University of Chile initiated in 2013 the implementation of a network of 65 permanent real-time six-component broadband and strong motion stations together with the installation of 130 Global Navigation Satellite Systems (GNSS) receivers; an off-line independent network of 297 strong ground motion instruments complement the system. The main portion of the deployment was completed within three years with later additions in specific zones of interest.

The network was designed to provide fast and accurate estimates of earthquake source parameters of potentially devastating earthquakes for emergency response applications, and was also capable of comprehensive characterization of Chilean seismicity, necessary for long-term hazard assessment and mitigation activities. In near-real-time applications, as well as in the near field, the GNSS stations become critical for determination of fault finiteness of M ∼ 7 or larger earthquakes that affect the coastal part of the country. We will present recent developments in rapid earthquake characterization using as examples the observations made for large earthquakes in the country: from the M8.2, April 1, 2014 event to the M6.9, April 24, 2017 earthquake.

Additionally, the network presently covers regions not monitored previously in a continuous manner at this scale, particularly in austral Chile, and clear patterns of seismicity are emerging after two years of operations in these areas.

As for future developments, a prototype of an integrated accelerometer device has been developed and tested for deployment in Central Chile as part of an Earthquake Early Warning System.

Presenting Author: Sergio E. Barrientos

Authors