Toward real-time microearthquake event detection and location in anisotropic media using a multiscale approach for EGS collab experiments

EGS Collab Team

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Real-time, automatic microearthquake detection and location provides crucial information on fracture growth during stimulation and is planned for the second phase of the EGS Collab stimulation experiments. We study the feasibility of real-time detection and location of microearthquake events for the sensor distribution in the EGS Collab Experiment I, using eighteen 3C accelerometers. We pre-compute a microearthquake waveform database for a 43 x 43 x 43 grid with a grid interval of 1 m using an anisotropic elastic-wave modeling tool. We then compute correlation coefficients between recorded seismograms and those in the waveform database using a moving time window and search for the highest correction coefficients to detect and locate microearthquake events simultaneously. Toward real-time monitoring, we employ a multiscale event scanning method that requires only 0.03% of the computation cost of the global search for 43 x 43 x 43 grid points and every scanning time step, making real-time detection and location feasible. We verify the feasibility of our multiscale microearthquake event detection and location for real-time monitoring using noise-free and noisy synthetic microearthquake data for the sensor distribution in the EGS Collab Experiment I.

Original languageEnglish (US)
Title of host publicationGeothermal's Role in Today's Energy Market - Geothermal Resources Council 2018 Annual Meeting, GRC 2018
PublisherGeothermal Resources Council
Pages695-707
Number of pages13
ISBN (Electronic)0934412235
StatePublished - Jan 1 2018
EventGeothermal Resources Council 2018 Annual Meeting: Geothermal's Role in Today's Energy Market, GRC 2018 - Reno, United States
Duration: Oct 14 2018Oct 17 2018

Publication series

NameTransactions - Geothermal Resources Council
Volume42
ISSN (Print)0193-5933

Conference

ConferenceGeothermal Resources Council 2018 Annual Meeting: Geothermal's Role in Today's Energy Market, GRC 2018
CountryUnited States
CityReno
Period10/14/1810/17/18

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All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Geophysics

Cite this

EGS Collab Team (2018). Toward real-time microearthquake event detection and location in anisotropic media using a multiscale approach for EGS collab experiments. In Geothermal's Role in Today's Energy Market - Geothermal Resources Council 2018 Annual Meeting, GRC 2018 (pp. 695-707). (Transactions - Geothermal Resources Council; Vol. 42). Geothermal Resources Council.