An Earthquake Early Warning System for Northern Chile
Session: Earthquake Early Warning System in the Americas: The On-Going Effort and the State of the Art I
Type: Oral
Date: 4/19/2021
Presentation Time: 06:00 PM Pacific
Description:
In 2020, the National Seismological Center (CSN) implemented an earthquake early warning (EEW) system in northern Chile, which has one of the largest seismic gaps in Chile. Here, a Mw ~ 9.0 earthquake is possible, even likely, in a region with a population of more than 1.4 million. From an economic perspective, this region hosts 90% of the copper mining companies and production in Chile, with more than 15% of the Gross National Product coming from the mining industry. With the goal of keeping both the population and mining industry safe, Antofagasta Minerals (AMSA) decided to finance an EEW prototype for this region, that could potentially save lives and support critical mining operations. Twenty-six new seismic stations have been added to the CSN permanent network to support this EEW system that will issue alerts for strong shaking. We successfully locate and calculate the magnitude of more than 1000 earthquakes using the EPIC (Earthquake Point‐source Integrated Code) algorithm developed for the U.S. ShakeAlert system. The average alert time per event is ~20 seconds and 95% of earthquakes larger than magnitude 5 were alerted.
Presenting Author: Sebastian Riquelme
Student Presenter: No
Authors
Miguel Medina miguel.medina@dgf.uchile.cl University of Chile |
Rodrigo Sanchez rodrigo@csn.uchile.cl University of Chile |
Sebastian Riquelme Presenting Author Corresponding Author sebastian@csn.uchile.cl University of Chile |
Sergio Barrientos sbarrien@csn.uchile.cl University of Chile |
Ivan Henson ihenson@berkeley.edu University of California, Berkeley |
Angela Chung aichung@berkeley.edu University of California, Berkeley |
Diego Melgar dmelgarm@uoregon.edu University of Oregon |
Ricardo Muhr rmuhr@aminerals.cl Antofagasta Minerals |
Constantino Mpodozis cmpdodozis@aminerals.cl Antofagasta Minerals |
Margaret Hellweg peggy@seismo.berkeley.edu University of California, Berkeley, Berkeley, California, United States |
Richard Allen rallen@berkeley.edu University of California, Berkeley, Berkeley, California, United States |
An Earthquake Early Warning System for Northern Chile
Category
Earthquake Early Warning System in the Americas: The On-going Effort and the State of the Art