Publication information

Geological Survey of Canada
Open File 8145

Earthquakes of the St. Lawrence River valley between Montreal and Québec: focal depth determination from Regional Depth Phases for the magnitude 2.8 and larger earthquakes for the time period 1980–2014  

S. Ma and M. Lamontagne

© Her Majesty the Queen in Right of Canada, as represented by the Minister of Natural Resources, 2017

Permanent link: https://doi.org/10.4095/304228

Publications in this series have not been edited; they are released as submitted by the author.

Recommended citation

Ma, S. and Lamontagne, M. 2017. Earthquakes of the St. Lawrence River valley between Montreal and Québec: focal depth determination from Regional Depth Phases for the magnitude 2.8 and larger earthquakes for the time period 1980–2014; Geological Survey of Canada, Open File 8145, 1 .zip file. https://doi.org/10.4095/304228

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Contents

This Open File describes how the focal depths of 62 earthquakes with magnitude (MN) ≥ 2.8 were calculated with the Regional Depth Phase Method (RDPM).  The earthquakes occurred between 1980 and 2014 in the St. Lawrence Valley between Montreal and Quebec City.  Nine of these 62 earthquakes are foreshocks, aftershocks or earthquake swarms.  For the 53 independent events, more than 50% occurred between 10 and 15 km depth.  Only 10% of the hypocentres are below 20 km, but that includes the two largest events of the period (MN 4.1 and 5.1). Shallow events (depth less than 5 km) represent only 5% of all SLV events.

Directory structure

of_8145.pdf
of_8145_Appendix_1.pdf
of_8145_readme.rtf

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Author contact information

M. Lamontagne  (maurice.lamontagne@canada.ca)
Geological Survey of Canada 
601 Booth Street
Ottawa, Ontario K1A 0E8 

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