John Adams's research while affiliated with Natural Resources Canada and other places

... In addition to the criteria for the selection of locations for the installation of seismological stations, such as choice of network geometry, natural conditions, seismic characteristics, seismic vibrations, relief, climatic conditions, conditions for the realization of works, the possibility of purchasing the land to be used, conditions for electricity supply, and ensuring telecommunication conditions for uninterrupted data transfer are also the criterion for determining the speed of seismic waves [6][7][8][9][10]. Considering the above, the configuration, i.e., the geometry of the network of seismological stations in Kosovo should be carefully selected. ...

... On this basis, the software and functional architecture of the system are designed. Finally, the application of the proposed system in the actual power grid is introduced [3]. ...

... This platform can benefit users from different domains, as it can be customized as per individual usage needs. Further, the source and ground motion models developed for NBCC 2015 have been implemented by Allen et al. (2020) in OpenQuake platform, which motivated and enabled authors for exploring this platform for estimating lateral spread hazard for the present study. ...

... Conversely, anomalous seismic swarms occurring at shallow depth can have natural causes (e.g. Bent et al., 2017). Natural earthquakes close to industrial sites heighten public concern and can cause financial loss to operating companies if mis-attributed as induced; an example being the 2015 Mw 6.1 Emilia, Italy earthquake (Dahm et al., 2015;Grigoli et al., 2017). ...

... This b-value is consistent with the studies of Sandiford (2013) for the same sequence. Magnitude-frequency distributions from aftershock sequences are dependent on the magnitude type used, but commonly have b-values less than 1.0 in stable continental interiors (e.g., Mandal et al., 2006;Ebel, 2009;Bent et al., 2015;Meng et al., 2018). For example, b-values for the 2011 M w 5.8 Mineral, Virginia, U.S.A., aftershock sequence have been estimated to be between 0.71 and 0.86 (McNamara et al., 2014;Wu et al., 2015;Meng et al., 2018). ...

... Figure 6 plots loss ratios for each system at the five considered hazard levels. 15 Although the fixed-base healthcare and school buildings have significantly higher loss ratios than the base-isolated buildings at all hazard levels, the highest loss ratio of the fixed-base system of 0.26 is significantly smaller than the FEMA P-58 replacement threshold of 0.4. Therefore, none of the buildings is to be replaced even for a very rare earthquake with the 2% probability of exceedance in 50 years. ...

... It is now a near-universal requirement for seismic design standards to use Vs 30 , which increases the precision and dependability of seismic design techniques, particularly for locations with diverse soil conditions (Castellaro et al., 2008;Borcherdt, 2012;Myriam et al., 2018;Stanko and Markušić, 2020). In Canada, Vs 30 was adopted for seismic site classification in the 2005 National Building Code (NBC) (Adams and Halchuk, 2004) and maintained in the code until 2020 (NBCC, 2015). The recently adopted 2020 NBC permits the use of Vs 30 directly to determine seismic design ground motions when it is calculated from an in situ seismic field method (Kolaj et al., 2020); otherwise, the design ground motions are the maximum motion for the seismic site class based on in situ measurements of standard penetration test blow count (N) or undrained shear strength (s u ) averaged for the upper 30 m. ...

... Figure 1-2. Carte géologique simplifiée de la région du Saint-Laurent (modifié d'après Mazzotti et al., 2005). Les ellipses en pointillés correspondent à des zones sismiques actives (CSZ : zone de Charlevoix-Kamouraska, LSZ : zone du Bas Saint-Laurent). ...

... The authors also suggested that aseismic creep and strain release might hinder significant strain energy accumulation. However, the overall low geodetic strain rates in this area (Mazzotti & Adams, 2005;Sella et al., 2007) make it challenging to evaluate which of the above two scenarios is more plausible. (Figure 4b) that is likely amplified by pre-existing structural weakness. ...

... The case of SSZ is a good example that explains why basing the seismic design on 475 years return period GM has led to the design of structures with lower reliability levels in the low-to moderate-hazard regions, which have severe earthquakes rarely. To treat the problem of these so-called "low-probability/high-consequence" earthquakes, many studies have proposed a transitioning to lower exceedance probabilities in national design provisions (Adams et al. 2000;Tsang 2011;Allen 2020). That is why modern codes in the US and Canada changed the reference hazard level from 10 to 2% in 50 years EP. ...