PECQ (BE)
Quarry blast1 April 2020
- Magnitude
- 2.0ML
- Depth
- –
- Belgian time
- 12:32:052020-04-01
- UTC
- 10:32:052020-04-01
Main parameters
| Date and time | 2020-04-01 10:32:05 UTC 2020-04-01 12:32:05 Belgian time |
|---|---|
| Magnitude | ML 2.0 |
| Epicentral coordinates | 50.677° N, 3.328° E Uncertainty ± 2.6 km |
| Event ID | ROB 9680 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-04-01 14:36:43 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
- 36.6 – 207.9km
- Mean velocity, P wave
- 6.2km/s
- Mean velocity, S wave
- 3.5km/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: 8 measurements, root-mean-square deviation 0.21 s. S wave: 5 measurements, root-mean-square deviation 0.22 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)11 stations | |||||
| LESLessines | 36.6 | 84 | 10:32:12.95+7.12 s | 10:32:17.03+11.20 s | 4.08 |
| SKQSteenkerque | 53.2 | 93 | 10:32:15.10+9.27 s | 10:32:21.64+15.81 s | 6.54 |
| BOUBougnies | 54.2 | 126 | 10:32:15.41+9.58 s | – | – |
| BRQBracquegnies | 61.2 | 111 | 10:32:16.29+10.46 s | – | – |
| RQRRonquières | 63.9 | 97 | 10:32:16.72+10.89 s | – | – |
| UCCBUccle | 74.0 | 79 | 10:32:18.45+12.62 s | 10:32:27.95+22.12 s | 9.50 |
| MRDMaredsous | 110.3 | 112 | 10:32:24.43+18.60 s | 10:32:38.65+32.82 s | 14.22 |
| DOUDourbes | 110.9 | 125 | 10:32:24.73+18.90 s | 10:32:38.20+32.37 s | 13.47 |
| GESGesves | 128.8 | 104 | 10:32:27.70+21.87 s | 10:32:44.29+38.46 s | 16.59 |
| CLAClavier | 142.8 | 101 | 10:32:29.73+23.90 s | 10:32:47.85+42.02 s | 18.12 |
| KLBKalborn | 207.9 | 107 | 10:32:39.57+33.74 s | 10:33:02.86+57.03 s | 23.29 |