Regional Differences in Ground-Motion Amplitudes of Small-to-Moderate Earthquakes across North America
Notice bibliographique
Résumé
Research Article| October 01, 2013 Regional Differences in Ground‐Motion Amplitudes of Small‐to‐Moderate Earthquakes across North America Alireza Babaie Mahani; Alireza Babaie Mahani University of Calgary, Department of Geoscience, ES 142, 2500 University Drive, Northwest, Calgary, Alberta, T2N 1N4 Canadaababaeim@ucalgary.cababaiemahani@gmail.com Search for other works by this author on: GSW Google Scholar Gail M. Atkinson Gail M. Atkinson Western University, Department of Earth Sciences, BGS 1068, 1151 Richmond Street, North, London, Ontario, N6A 5B7 Canada Search for other works by this author on: GSW Google Scholar Author and Article Information Alireza Babaie Mahani University of Calgary, Department of Geoscience, ES 142, 2500 University Drive, Northwest, Calgary, Alberta, T2N 1N4 Canadaababaeim@ucalgary.cababaiemahani@gmail.com Gail M. Atkinson Western University, Department of Earth Sciences, BGS 1068, 1151 Richmond Street, North, London, Ontario, N6A 5B7 Canada Publisher: Seismological Society of America First Online: 14 Jul 2017 Online ISSN: 1943-3573 Print ISSN: 0037-1106 Bulletin of the Seismological Society of America (2013) 103 (5): 2604–2620. https://doi.org/10.1785/0120120350 Article history First Online: 14 Jul 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Get Permissions Search Site Citation Alireza Babaie Mahani, Gail M. Atkinson; Regional Differences in Ground‐Motion Amplitudes of Small‐to‐Moderate Earthquakes across North America. Bulletin of the Seismological Society of America 2013;; 103 (5): 2604–2620. doi: https://doi.org/10.1785/0120120350 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin of the Seismological Society of America Search Advanced Search Abstract We studied the response spectral amplitudes and peak ground acceleration (PGA) of earthquakes with moment magnitude (M) from 3.0 to 6.0 to investigate regional differences in ground‐motion amplitudes across North America on a nonparametric basis, for a common National Earthquake Hazards Reduction Program B/C site condition (e.g., shear‐wave velocity of 760 m/s in the top 30 m of the soil column). We use southern California as the reference region because it has the most plentiful data against which to compare other regions. Amplitudes of response spectra in eastern Canada/northeastern United States become increasingly larger than those in southern California as distance, frequency, and magnitude increases. In the central United States, ground‐motion amplitudes are larger than those in southern California at distances more than 100 km (and lower at distances less than 100 km), over all frequency and magnitude ranges studied. Amplitudes for crustal events in the Pacific Northwest/British Columbia are lower than those in southern California at frequencies ≥1 Hz, over all magnitude and distance ranges (but have similar amplitudes below 1 Hz). Amplitudes in northern California are similar to those in southern California at low frequencies (below 3.3 Hz) but have lower amplitudes at high frequencies (PGA) over all distances and magnitudes. We conclude that regional amplitude differences are largely attributable to complex frequency‐dependent differences in regional attenuation. For example, the slope of apparent geometric spreading at distances less than 100 km is significantly steeper (more negative) in eastern Canada/northeastern United States than other regions and may be frequency dependent. The regional attributes of the attenuation comparisons appear to be the same for both vertical and horizontal components, at least for B/C site conditions.Online Material: Figures of region‐dependent ground‐motion amplitudes, apparent geometric spreading, statistical tests of the ground motions, and figures and table of ratios of ground motions relative to those from southern California. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
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Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,001 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,001 | 0,002 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,001 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,003 | 0,001 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».