Ministry of Energy and Mines
Map 2

Earthquake Hazards Mapping

Map 2 is a simplified version of the amplification of ground motion map. This map has been simplified from Geoscience Map 2000-3b by combining the very low and low ratings and the very high and high ratings to produce a three-class rating system - low, moderate and high.

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Legend

Relative Hazard Ratings

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Maps 2-4, and Amplification Hazard on Map 1.

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Map 1 only.

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Streams; potential for locally high to very high liquefaction hazard.
Bedrock in shallow (generally <3m) excavation.
Small outcrop.
Borehole.
* Low to high hazard is applied to areas with insufficient data to assign a more specific hazard rating, but the average hazard rating can be considered moderate in these areas (see also comments on Map 1 referring to areas assigned low to high hazard rating on the slope hazard map).
The relative amplification hazard ratings shown on Maps 1 and 2 are generalized ratings and do not reflect the amplification hazard in all cases. In particular, the amount of amplification due to soil conditions diminishes as the strength of ground shaking (i.e. acceleration) increases. Maps 5 to 8 show how amplification factors (not the actual amount of earthquake ground motion) can vary wtih different strengths and periods of ground motion. The variation in ground motions predicted using the amplification factors shown in Maps 5 to 8 does not exceed the seismic design criteria of the current building code (National Research Council of Canada, 1995), but could be significant for structures not governed by the seismic provisions of the code as well as older structures.
NOTE:
This map and accompanying information are not intended to be used for site specific evaluation of properties. Soil and ground conditions in the map area were interpreted based on borehole data and other information, available prior to the date of publication and obtained from a variety of sources. Conditions and interpretations are subject to change with time as the quantity and quality of available data improves. The authors and the Ministry of Energy and Mines are not liable for any claims or actions arising from the use or interpretation of this data and do not warrant its accuracy and reliability.

 

Last updated August 30, 2000.

Geological Survey Branch