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Network of the Americas Borehole Strainmeter and Seismic Network: Network Highlights at 15 years plus of Continuous Operation

The Network of the Americas (NOTA) Borehole Strainmeter and Seismic (BSM) Network was installed between 2005 to 2009 as part of the NSF-funded Earthscope MREFC Plate Boundary Observatory (PBO). The network has continuous data collection for up to 18 years consisting of 73 sites, with 6 additional seismic only borehole sites, clustered around areas of geophysical interest such as observing slow slip along the Cascadia Subduction Zone from Vancouver Island through Northern California, the Mendocino Triple Junction, sections of the San Andreas Fault that observe creeping to locked zones as well as transition zones, the Eastern CA Shear Zone, Yellowstone Caldera, and St Helens Volcano. Subsequent to the original PBO network, 4 stations from the CALIPSO network in Montserrat, 6 strainmeters from the GONAF network in Turkey, and 6 strainmeters from the TABOO-STAR network in Italy are also maintained by NOTA and provide data to the archive. Throughout the NOTA BSM network, the Gladwin Tensor Strainmeter (GTSM) is grouted near the bottom of the borehole with a Malin 3-component 2 Hz Geophone Borehole Seismometer above. Instrument depths range from 76 to 243 meters, determined by the downhole geology. 10 volcano sites include Lily Borehole Tiltmeters and 27 sites include pore pressure sensors.

In celebration of the BSM network at 15 years of operations we will share network highlights, such as observing the 2019 Ridgecrest and other plate boundary geophysical events. Strain data has been used to create Peak Dynamic Strain models, which give an event magnitude estimate from the Gladwin strainmeters. With an aging network there is the constant assessment of replacing old technology with newer technologies and will share our direction for the future of the BSM network. All NOTA BSM data is available at the EarthScope Consortium DMC as the PBO Borehole Seismic Network (FDSN code PB) and has near-real-time data flow capabilities. Strain data is also available as network code GF (Geophysical Borehole Observatory at the North Anatolian Fault) and IV (Italian Seismic Network).

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

Type: Poster

Room: Ballroom

Date: 4/20/2023

Presentation Time: 08:00 AM (local time)

Presenting Author: Elizabeth J. VanBoskirk

Student Presenter: No

Additional Authors