000011579 001__ 11579
000011579 005__ 20141205155925.0
000011579 04107 $$aeng
000011579 046__ $$k2008-10-12
000011579 100__ $$aSeemann, Mark
000011579 24500 $$aSeismic Hazard Resulting from Aftershock Activity Following a Cascadia Subduction Earthquake

000011579 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000011579 260__ $$b
000011579 506__ $$arestricted
000011579 520__ $$2eng$$aGreat (M>8.0) subduction interface earthquakes, or megathrust earthquakes, are typically followed by hundreds or even thousands of aftershocks, several of which may have magnitudes exceeding M7.0. While the seismic hazard resulting from a Cascadia megathrust earthquake is well recognized and discussed, little attention has been given to quantifying the subsequent aftershock activity and its potential impact on communities in the region. The probability of the next Cascadia megathrust earthquake occurring within the next 100 years is estimated to be 17 percent. Based on an analysis of recorded aftershock sequences at Cascadia-like subduction zones, this paper offers preliminary estimates of ground shaking probabilities resulting from Cascadia megathrust earthquake aftershocks for 22 communities in southwestern British Columbia, Canada and the Pacific Northwest, USA. Calculations estimate the likelihood of an aftershock exceeding each of three intensity levels (MMI V - widely felt; MMI VI threshold for non-structural damage; and, MMI VII - threshold of structural damage). Results presented in this paper are intended to enable community officials and the general public to better understand the Cascadia earthquake threat and to encourage a more comprehensive discussion of the next great Cascadia megathrust event.

000011579 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000011579 653__ $$aAftershocks, subduction earthquakes, ground shaking probabilities, Cascadia

000011579 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000011579 720__ $$aSeemann, Mark$$iOnur, Tuna$$iCassidy, John F.
000011579 8560_ $$ffischerc@itam.cas.cz
000011579 8564_ $$s193744$$uhttps://invenio.itam.cas.cz/record/11579/files/03-01-0026.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 03-01-0026.
000011579 962__ $$r9324
000011579 980__ $$aPAPER