COUVIN (BE)
Quarry blast28 March 2017
- Magnitude
- 2.0ML
- Depth
- –
- Belgian time
- 12:53:262017-03-28
- UTC
- 10:53:262017-03-28
Main parameters
| Date and time | 2017-03-28 10:53:26 UTC 2017-03-28 12:53:26 Belgian time |
|---|---|
| Magnitude | ML 2.0 |
| Epicentral coordinates | 49.993° N, 4.497° E Uncertainty ± 4.6 km |
| Event ID | ROB 5659 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2017-03-28 13:09:40 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
- 10
- Epicentral distance
- 13.3 – 133.3km
- Mean velocity, P wave
- 5.3km/s
- Mean velocity, S wave
- 3.4km/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: 6 measurements, root-mean-square deviation 0.66 s. S wave: 7 measurements, root-mean-square deviation 0.32 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)9 stations | |||||
| DOUDourbes | 13.3 | 32 | 10:53:27.80+1.49 s | 10:53:29.45+3.14 s | 1.65 |
| MRDMaredsous | 39.4 | 29 | 10:53:34.50+8.19 s | 10:53:37.02+10.71 s | 2.52 |
| RCHRochefort | 55.3 | 71 | 10:53:35.71+9.40 s | 10:53:42.57+16.26 s | 6.86 |
| SNFSeneffe | 59.6 | 345 | 10:53:36.46+10.15 s | 10:53:43.10+16.79 s | 6.64 |
| GESGesves | 60.6 | 44 | 10:53:36.61+10.30 s | 10:53:43.89+17.58 s | 7.28 |
| CLAClavier | 74.5 | 50 | 10:53:39.64+13.33 s | 10:53:47.41+21.10 s | 7.77 |
| SKQSteenkerque | 78.8 | 338 | – | 10:53:49.32+23.01 s | – |
| MRGMont Rigi | 126.4 | 62 | 10:53:47.34+21.03 s | – | – |
| MEMSMembach | 127.7 | 57 | 10:53:47.81+21.50 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 133.3 | 49 | 10:53:48.86+22.55 s | – | – |