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Revamping the Oklahoma Geological Survey Statewide Seismic Network for the Next Generation of Earthquake Monitoring

Description: 

The Oklahoma Geological Survey (OGS) monitors seismicity in Oklahoma by utilizing permanent and temporary seismometers installed by OGS and other agencies to generate a real‐time earthquake catalog. The OGS seismic network, functioning as a self-sustaining regional component of the Advanced National Seismic System (ANSS), provides earthquake information to the ANSS Comprehensive Earthquake Catalog, that is essential for the Oklahoma Corporation Commission to enforce their "traffic-light" mitigation strategy and other remedial measures. The occurrence of induced earthquakes in the state expedited the network's expansion from 10 permanent stations in 2010, to 34 permanent and 67 temporary stations as of January 2025. The spatiotemporal distribution of the seismic stations has largely been influenced by the advancement of seismic activity across the state. The network's development throughout time has resulted in the installation of a variety of instruments of varying quality, with most of the data transmitted via REFTEK Protocol.

We present a revamp of the OGS seismic network for the next generation of earthquake monitoring through a state legislative appropriation. We will be upgrading the seismic equipment at each of the OK and O2 network stations with new broadband sensors and convert the current temporary O2 network to the permanent OK network. We are expanding the network to 175 permanent stations with emphasis on reducing the close station epicentral distance, especially around faults that have proved to be prone to reactivation based on the last decade of earthquake history. Half of the permanent network will consist of additional accelerometers pertinent to seismic hazard studies across the state. In addition, we will purchase 50 short-period sensors for portable deployments. All the stations will stream real-time data via SeedLink protocol thereby improving data latency. We plan to incorporate infrasound sensors co-located with some of the equipment. We will discuss these plans and other upgrades required in back-end infrastructure and management that need to be made to handle the additional sensor data.

Session: Network Seismology: Recent Developments, Challenges and Lessons Learned - III

Type: Oral

Date: 4/15/2025

Presentation Time: 02:45 PM (local time)

Presenting Author: Paul

Student Presenter: No

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