PECQ (BE)
Quarry blast23 January 2017
- Magnitude
- 2.1ML
- Depth
- –
- Belgian time
- 13:00:172017-01-23
- UTC
- 12:00:172017-01-23
Main parameters
| Date and time | 2017-01-23 12:00:17 UTC 2017-01-23 13:00:17 Belgian time |
|---|---|
| Magnitude | ML 2.1 |
| Epicentral coordinates | 50.662° N, 3.381° E Uncertainty ± 6.3 km |
| Event ID | ROB 5616 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2017-01-23 13:36:11 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
- 13
- Epicentral distance
- 49.4 – 191.5km
- Mean velocity, P wave
- 5.8km/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. Depth not determined: hypocenter placed at the surface for the calculation. P wave: 9 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 | |
|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)12 stations | |||||
| SKQSteenkerque | 49.4 | 91 | 12:00:26.05+8.61 s | 12:00:31.56+14.12 s | 5.51 |
| BOUBougnies | 50.2 | 127 | 12:00:26.26+8.82 s | – | – |
| BRQBracquegnies | 57.1 | 110 | 12:00:27.24+9.80 s | – | – |
| RQRRonquières | 60.0 | 96 | 12:00:27.58+10.14 s | 12:00:34.40+16.96 s | 6.82 |
| ZEVZevekote | 62.8 | 328 | 12:00:28.41+10.97 s | – | – |
| SNFSeneffe | 66.1 | 104 | 12:00:28.46+11.02 s | – | – |
| UCCSUccle | 70.7 | 77 | 12:00:29.31+11.87 s | – | – |
| MRDMaredsous | 106.2 | 112 | 12:00:35.92+18.48 s | 12:00:49.42+31.98 s | 13.50 |
| DOUDourbes | 106.9 | 126 | 12:00:35.84+18.40 s | – | – |
| GESGesves | 124.8 | 104 | 12:00:38.53+21.09 s | 12:00:53.97+36.53 s | 15.44 |
| CLAClavier | 138.8 | 100 | 12:00:40.62+23.18 s | 12:00:57.37+39.93 s | 16.75 |
| MRGMont Rigi | 191.5 | 94 | 12:00:48.35+30.91 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 180.5 | 85 | 12:00:47.23+29.79 s | – | – |