Blasting
notices
Date : June 3, 2020 11:00
Length : 9544 MS
Blasting may be cancelled due to unfavourable winds or community activities, such as religious ceremonies.
We are authorized to perform two blasts per day, 365 days a year, between 11 a.m. and noon, and between 3 p.m. and 4 p.m. The permitted blast length is 15 seconds. Standards are 12.7 mm/second for vibrations and 128 dB for noise.
| Date | Reference | Length | Seismograph | Wind Direction | Vibration | Decibels |
|---|---|---|---|---|---|---|
| 2020-06-02 15:00 (Canceled) | 20200602 PM | 5744 MS | ||||
| 2020-06-01 15:00 | 20200601 PM | 1 MS | ||||
| Jacques-Cartier | NE | SSD | SSD | |||
| Musée | NE | SSD | SSD | |||
| Renaud | NE | SSD | SSD | |||
| Des Saules | NE | SSD | SSD | |||
| Abitibi | NE | SSD | SSD | |||
| Royale | NE | SSD | SSD | |||
| Lasalle | NE | SSD | SSD |
Date : Blast date and time
Reference : Blast identification
Length : Blast length or the period between the detonation of the first shot and the detonation of the last shot in a sequence.
Seismograph : Measuring instrument equipped with a geophone and a microphone. The geophone detects ground motion and vibrations passing through the earth’s crust. The microphone detects air pressure variations..
Wind Direction : Indicates wind direction
Vibration : Indicates ground motion.
Decibels (dB) : Indicates air pressure variations.
Below Detection Limit (BDL) : Indicates seismograph has not been triggered. Seismograph is not triggered when ground vibrations are below 1 mm/s.
Not available (NA) : Indicates value is unavailable.
ms : Length is measured in milliseconds (1,000 ms = 1 second).
