CORDES (BE)
Quarry blast14 February 2017
- Magnitude
- 1.2ML
- Depth
- 8.1km ± 9.8
- Belgian time
- 13:00:182017-02-14
- UTC
- 12:00:182017-02-14
Main parameters
| Date and time | 2017-02-14 12:00:18 UTC 2017-02-14 13:00:18 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.683° N, 3.513° E Uncertainty ± 8.0 km |
| Depth of hypocenter | 8.1 ± 9.8 km |
| Event ID | ROB 5634 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2017-02-14 14:40:26 Belgian time
Location map
- Epicentre
- Station that recorded the event
Arrival times at the stations
Each station first records the P wave, the fastest, then the S wave. The farther a station is from the epicentre, the later the waves reach it and the wider the gap between the two.
- Stations
- 6
- Epicentral distance
- 40.3 – 130.1km
- Mean velocity, P wave
- 5.9km/s
- P wave
- S wave
- Curve fitted to the measurements
Notes and method
Curves: travel time of a direct wave in a homogeneous medium. The velocity of each wave and an origin-time shift, common to both, are fitted to the measurements by least squares. Hypocenter at a depth of 8.1 km. P wave: 5 measurements, root-mean-square deviation 0.20 s.
Stations farther than 120 km are left out of the fit: the first waves to reach them have travelled beneath the crust, through the mantle, where they propagate faster.
Station measurements
P- and S-wave arrivals and ground displacement measured at each station. Click a column heading to change the order.
| km | ° | UTC | UTC | s | nm | |
|---|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)6 stations | ||||||
| SKQSteenkerque | 40.3 | 95 | 12:00:25.94+7.23 s | – | – | – |
| BRQBracquegnies | 49.5 | 117 | 12:00:27.00+8.29 s | – | – | – |
| RQRRonquières | 51.1 | 99 | 12:00:27.48+8.77 s | – | – | – |
| SNFSeneffe | 57.8 | 109 | 12:00:28.32+9.61 s | – | – | – |
| DOUDourbes | 101.0 | 130 | 12:00:35.95+17.24 s | 12:00:48.01+29.30 s | 12.06 | 4.4 |
| CLAClavier | 130.1 | 102 | 12:00:40.43+21.72 s | – | – | – |