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Improving Earthquake Monitoring Capabilities in Ohio With Low-Cost Robust Posthole Vaults

Description: 

The Ohio Seismic Network (OhioSeis) has undergone a significant transformation in instrumentation and vault design over the past decade. The current, modern network has substantially increased the number of earthquake detections across the region and improved our understanding of local seismic hazards and faulting mechanisms. Initially planned and created as a small cooperative network with single-component, narrowband instruments placed indoors, today OhioSeis consists of 29 free-field, broadband stations comprised of a selection of former Transportable Array (TA) vaults, shallow-surface barrel vaults, and more recently, posthole-style vaults. Recent work has focused on improving the viability and lowering the costs of these posthole emplacements. A complete off-the-shelf solution has been developed that can be installed permanently or slightly altered for rapid temporary deployments, such as during aftershock sequences. Depending on emplacement depth, a complete vault can be installed in as little as two hours for less than $100. Vault flooding, instrument damage, and station noise impacting OhioSeis stations have decreased with these new posthole emplacements. Earthquake catalog magnitude of completeness has been lowered to approximately ML 1.5. Today, OhioSeis is better equipped to detect low-magnitude earthquakes across the entire state and better serve the public, researchers, planners, and first responders with high-quality seismic data.

Session: Network Seismology: Recent Developments, Challenges and Lessons Learned [Poster Session]

Type: Poster

Date: 5/1/2024

Presentation Time: 08:00 AM (local time)

Presenting Author: Jeffrey

Student Presenter: No

Invited Presentation: 

Authors