The Sidebar Computer Program, a seismic-shaking intensity meter: users' manual and software description

Evans, John R.

doi:10.3133/ofr03202

Cited by 2 publications

(4 citation statements)

References 4 publications

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“…Both in Figures 8a and 8b, an empirical statistical-fit model is represented as a dashed curve. The parameter, PGV 2 /PGA, follows the findings of Pineda-Porras and Ordaz [29], and the boxes marked as indicative damage limits follow the findings of Evans [30].…”

Section: Seismicitysupporting

confidence: 71%

“…As always in assessing seismic hazards, attention must be paid to differences between earthquake intensity and associated earthquake damage [27][28][29][30]. In many situations, earthquake damage from a given earthquake intensity varies with geology, including whether a structure is founded upon solid bedrock or loose sediments.…”

Section: Seismicitymentioning

confidence: 99%

“…For seismic damage to buried pipelines, Pineda-Porras and Ordaz [29] found a predictor of PGD based on PGA and PGV. A separate, calibrated ground-shaking model by Evans [30], found related relationships for seismic damage:…”

Section: Seismicitymentioning

confidence: 99%

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Geologic perspective for carbon sequestration by woody biomass burial

Gooding

2023

STET

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Carbon sequestration by Woody Biomass Burial (WBB) leverages carbon capture through natural photosynthesis, followed by the isolation of dead or fallen wood in a relatively shallow Underground Wood Vault (UWV). Long-term geologic containment, including any greenhouse gas decomposition products, depends on the careful selection of UWV location and depth. To achieve carbon sequestration durability of 100 y, an initially low-moisture UWV should be built as follows: (a) low-permeability, high-plasticity clays with a hydraulic conductivity of ≤10−9 m/s, and with vertical/lateral separation distance of ≥1 m from the nearest aquifer; (b) residual compaction voids at least partially filled, with loose, smectite-rich clay; (c) capped with ≥2 m of clay compacted to achieve hydraulic conductivity <5 × 10−9 m/s; (d) restricted to locations where the 50-y seismic Peak Ground Acceleration (PGA) is ≤9% g (8.8 × 10−1 m/s2). A UWV built in a low-PGA location, with larger cap and confinement thicknesses and/or lower hydraulic conductivity, should be capable of sequestration durability approaching 500–1000 y or more.

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Section: Seismicitysupporting

confidence: 71%

Section: Seismicitymentioning

confidence: 99%

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Geologic perspective for carbon sequestration by woody biomass burial

Gooding

2023

STET

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“…We have taken additional steps to lower costs or optimize the usefulness of TREMOR instruments. These include rapid, integer computation of PGV by a microcontroller (Evans et al 2003), retention in memory of the events with the largest PGVs (discussed above), a computer program for monitoring TREMOR data locally (Evans 2003), and a suggestion for lowering the risk and cost of operating GPS at any instrument. We also compiled new and old methods for siting and permitting instruments, and joined or planned cooperative efforts with a wide range of public and private groups (Evans et al 2003).…”

Section: Other Mattersmentioning

confidence: 99%

TREMOR: A Wireless MEMS Accelerograph for Dense Arrays

Evans

Hamstra²,

Kundig³

et al. 2005

Earthquake Spectra

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The ability of a strong-motion network to resolve wavefields can be described on three axes: frequency, amplitude, and space. While the need for spatial resolution is apparent, for practical reasons that axis is often neglected. TREMOR is a MEMS-based accelerograph using wireless Internet to minimize lifecycle cost. TREMOR instruments can economically augment traditional ones, residing between them to improve spatial resolution. The TREMOR instrument described here has dynamic range of 96 dB between ±2 g, or 102 dB between ±4 g. It is linear to <1% of full scale (FS), with a response function effectively shaped electronically. We developed an economical, very low noise, accurate (<1%FS) temperature compensation method. Displacement is easily recovered to 10-cm accuracy at full bandwidth, and better with care. We deployed prototype instruments in Oakland, California, beginning in 1998, with 13 now at mean spacing of ∼3 km—one of the most densely instrumented urban centers in the United States. This array is among the quickest in returning (PGA, PGV, Sa) vectors to ShakeMap, ∼75 to 100 s. Some 13 events have been recorded. A ShakeMap and an example of spatial variability are shown. Extensive tests of the prototypes for a commercial instrument are described here and in a companion paper.

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The Sidebar Computer Program, a seismic-shaking intensity meter: users' manual and software description

Cited by 2 publications

References 4 publications

Geologic perspective for carbon sequestration by woody biomass burial

Geologic perspective for carbon sequestration by woody biomass burial

TREMOR: A Wireless MEMS Accelerograph for Dense Arrays

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