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Adaptive Spectrum Analysis for a Precise Attenuation Parameter Estimation on the Induced Seismicity Recorded at Puerto Gaitán (Colombia)

Description: 

In the last few years there has been a growing interest in the seismicity within the intraplate settings caused by natural processes and anthropogenic activity. Since 2013 a significant increase in seismic activity has been detected and associated to reinjection of wastewater of ~477000 m³ a day at Puerto Gaitán. The operator installed a local seismic network composed by 22 broadband triaxial stations surrounding the injection wells. Through this network, more than 7000 shallow earthquakes were recorded between 2013 and 2016. We are interested in estimating seismic attenuation and its temporal variations, but before being able to do an attenuation tomography, our main objective is to focus on robustly determining: (1) hypocentral parameters and (2) source spectra and other spectrum characteristics to better select the optimum band range for studying attenuation properties. To achieve this, the processing flowchart implemented here involves a precise earthquake locations and spectral methods to determine earthquake source and attenuation parameters using a proposed adaptive window analysis. In this work, we will present the processing techniques carried out as inputs of the tomography study.

Session: Understanding and Managing Induced Seismicity [Poster]

Type: Poster

Date: 4/19/2023

Presentation Time: 08:00 AM (local time)

Presenting Author: German A. Prieto

Student Presenter: No

Invited Presentation: 

Authors