Physics
Scientific paper
Apr 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985pepi...38...83w&link_type=abstract
Physics of the Earth and Planetary Interiors, Volume 38, Issue 2-3, p. 83-91.
Physics
Scientific paper
Although large earthquakes including several of magnitude 7 are known to have occurred in eastern Canada since the arrival of European settlers in the 16th century, no significant strong ground motion records were available until 1982, and earthquake engineering design relies on extrapolation of results from mostly California data, modified to take into account the well-known lower attenuation of felt intensities in the east.
In January 1982, a mb 5.7 earthquake occurred in the sparsely populated central region of New Brunswick and was felt at ground level to distances of 400 km. Quickly installed strong motion recorders registered peak acceleration over 50% of gravity at high frequencies close to a mb 5.0 aftershock. This is an order of magnitude higher than expected from the reported intensities and from the absence of significant damage; however, peak ground velocities, as well as the low-frequency Fourier components of acceleration, are consistent with accepted ground motion/intensity relations. This highlights again the need to go beyond the single-parameter scaling of ground motion for purposes of the building code for ordinary buildings and for special engineering structures.
The large dynamic range of the digital records from the Eastern Canadian Telemetered Seismic Network allows limited extrapolation of the strong motion records to the larger earthquakes and, by inference, to perhaps other eastern earthquakes in granitic environments, such as Charlevoix, Temiskaming and Cornwall, where large magnitudes appear to be generated in small source volumes, resulting in explosion-like high frequency but short-duration near-source ground motions.
No associations
LandOfFree
New Brunswick strong ground motion records does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with New Brunswick strong ground motion records, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and New Brunswick strong ground motion records will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1289895