MONTROEUL-AU-BOIS (BE)
Quarry blast15 May 2017
- Magnitude
- 1.8ML
- Depth
- 13.0km ± 4.1
- Belgian time
- 13:00:382017-05-15
- UTC
- 11:00:382017-05-15
Main parameters
| Date and time | 2017-05-15 11:00:38 UTC 2017-05-15 13:00:38 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.654° N, 3.558° E Uncertainty ± 5.3 km |
| Depth of hypocenter | 13.0 ± 4.1 km |
| Event ID | ROB 5701 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2017-05-15 14:10:00 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
- 11
- Epicentral distance
- 21.1 – 131.0km
- 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 13.0 km. P wave: 8 measurements, root-mean-square deviation 0.50 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)11 stations | ||||||
| LESLessines | 21.1 | 73 | 11:00:42.42+4.24 s | 11:00:46.49+8.31 s | 4.07 | – |
| BOUBougnies | 40.3 | 137 | 11:00:45.61+7.43 s | – | – | – |
| BRQBracquegnies | 45.3 | 115 | 11:00:44.66+6.48 s | – | – | – |
| RQRRonquières | 47.5 | 96 | 11:00:46.19+8.01 s | – | – | – |
| SNFSeneffe | 53.9 | 107 | 11:00:47.00+8.82 s | – | – | – |
| MRDMaredsous | 94.4 | 114 | 11:00:54.32+16.14 s | – | – | – |
| DOUDourbes | 96.5 | 130 | 11:00:54.44+16.26 s | 11:01:06.57+28.39 s | 12.13 | – |
| GESGesves | 112.5 | 105 | 11:00:56.96+18.78 s | 11:01:10.77+32.59 s | 13.81 | – |
| DSLBDessel | 123.9 | 58 | 11:00:58.40+20.22 s | – | – | – |
| CLAClavier | 126.4 | 101 | 11:00:59.21+21.03 s | 11:01:12.81+34.63 s | 13.60 | 13.9 |
| RCHRochefort | 131.0 | 114 | 11:01:00.37+22.19 s | – | – | – |