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.

Legend
Relative Hazard Ratings |

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. |
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| * 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. |
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