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TitleAttenuation of seismic waves in the northern Appalachians of southeastern Canada
AuthorFarahbod, A M; Cassidy, JORCID logo
SourceCTBT Science and Technology Conference 2021 (SnT2021), book of abstracts; Comprehensive Test Ban Treaty Organization (CTBTO), Science and Technology (SnT) Conference Series 2021 p. 105 Open
Access logo Open Access
LinksOnline - En ligne (complete volume - volume complet, PDF, 1.70 MB)
Alt SeriesNatural Resources Canada, Contribution Series 20200629
PublisherComprehensive Nuclear-Test-Ban Treaty Organization (CTBTO)
MeetingSnT 2021 - Comprehensive Test Ban Treaty Organization (CTBTO) Science and Technology (SnT) Conference 2021; June 28-July 2, 2021
Mediapaper; on-line; digital
File formatpdf
ProvinceNew Brunswick
NTS11E; 11L; 21B; 21G; 21H; 21I; 21J; 21N; 21O; 21P; 22A; 22B; 22C
Lat/Long WENS -70.0000 -63.0000 49.0000 44.0000
Subjectstectonics; geophysics; Nature and Environment; Science and Technology; Health and Safety; seismology; seismic waves; attenuation; earthquakes; earthquake risk; seismicity; seismic risk; modelling; Appalachian Orogen; Canadian National Seismograph Network; Charlevoix Seismic Zone
ProgramPublic Safety Geoscience Assessing Earthquake Geohazards
Released2021 06 01
AbstractWe investigate seismic attenuation characteristics of the Canadian portion of the northern Appalachians. Coda Q is determined using 389 earthquakes (1.8 =< M =< 3.9) recorded on four stations of the Canadian National Seismic Network (CNSN) in New Brunswick from 1985 to 2020. For comparison, we divide the study area into northern and southern portions, each with two seismic stations and 162 and 227 events, respectively. At lapse times of 12 to 60 seconds, coda Q at 1 Hz (Q0) at the two seismic stations in the region of northern New Brunswick that is closer to the seismically active Charlevoix seismic zone (including a M7 event in 1663) is 82 +/- 5 on average. In contrast, the two stations in southern New Brunswick have an average Q0 of 114 +/- 3. The lower Q0 value in the north in comparison with the southern part of the region is in agreement with Jin and Aki's (1988) finding that Q0 is lower in the vicinity of large earthquakes. Ongoing mapping of coda Q in the area using the CNSN stations is planned in order to contribute to the ongoing development of more accurate seismic hazard models.
Summary(Plain Language Summary, not published)
Our presentation provides an overall knowledge about coda Q in a region in southeastern Canada. Coda Q is one of the most useful parameters for the study of earth structure and earthquake hazard assessments. This is the first study of this type in this part of Canada.

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