|Title||Macroseismic and landslide information on the 1663 moment magnitude (M) 7 earthquake, Charlevoix, Quebec|
|Licence||Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences.|
|Source||Geological Survey of Canada, Open File 8772, 2021, 25 pages, https://doi.org/10.4095/328121 Open Access|
|Publisher||Natural Resources Canada|
|File format||pdf; rtf; xlsx (Microsoft® Excel®); kmz (Google® Earth®)|
|Province||Quebec; Nova Scotia|
|NTS||11; 20; 21; 22; 30; 31|
|Area||Charlevoix; St. Lawrence River; Trois-Rivières; Montréal; Canada; United States of America|
|Lat/Long WENS|| -78.0000 -60.0000 50.0000 40.2167|
|Subjects||geophysics; sedimentology; surficial geology/geomorphology; geochronology; Science and Technology; Nature and Environment; Health and Safety; seismology; earthquakes; earthquake magnitudes; earthquake
risk; earthquake damage; epicentres; landslides; mass wasting; history; geological history; depositional history; sedimentation rates; mud volcanoes; radiometric dating; radiocarbon dating; February 5, 1663 M7 Charlevoix Earthquake; Charlevoix
|Illustrations||photographs; location maps|
Safety Geoscience Intraplate Earthquakes|
|Released||2021 03 30|
|Abstract||The February 5, 1663, magnitude 7 Charlevoix earthquake occurred at approximately 5:30 p.m. local time (February 5, 1663, 22:30 U.T.). This earthquake is one of five known moment magnitude 5.5-7 events
that occurred in the Charlevoix Seismic Zone (CSZ) between 1663 and the present. Due to the sparse population at the time, the exact position of the epicenter and the magnitude are still debated. The Charlevoix Seismic Zone is generally assumed as
the epicentral region based on its historical earthquakes and its sustained lower magnitude earthquake activity. Given that this earthquake occurred in the mid 1600's and far from the few existing towns, felt accounts are limited in number. Available
historical documents reveal that it was felt by the then 2500 inhabitants of New France mostly concentrated in three towns (Quebec City, Trois-Rivières, Montréal), and by other inhabitants of New England and New Holland.|
information is augmented by landslides (subaqueous and terrestrial) and sedimentation events which likely were triggered by the 1663 earthquake. Most of these mass movements are dated using either C14 or sedimentation rate methods. These mass
movements are used as proxies to estimate both the magnitude of the earthquake and its epicentre.
This Open File Report presents the macroseismic information and its ratings on the Modified Mercalli Scale for a total of eight locations for Canada.
For each 2 locality, the felt information is rated on the Modified Mercalli intensity (MMI) scale and tabulated in a Microsoft Excel sheet. The text of some of the newspaper accounts are reproduced. The Open File also provides a GoogleEarth kmz file
that allows the felt information reports to be viewed in a geographic visualization tool.
|Summary||(Plain Language Summary, not published)|
The February 5, 1663, magnitude 7 Charlevoix earthquake occurred at approximately 8:00 p.m. local time (December 7, 1663, 01:00 U.T.). Given that this
earthquake occurred in the 1600's and far from major cities, felt accounts and newspaper reports are limited in number. Available historical documents reveal that it was felt in New France (Quebec City, Trois-Rivières, Montréal, plus a few other
poorly located sites), New England and New Holland. Modified Mercalli Scale for a total of eight locations for Canada. For each locality, the felt information is rated on the Modified Mercalli intensity (MMI) scale and tabulated in a Microsoft Excel
sheet. The text of some of the newspaper accounts were copied. The Open File also provides a GoogleEarth kmz file that allows the felt information reports to be viewed in a spatial tool.