TROOZ (BE)
Quarry blast9 December 2021
- Magnitude
- 0.8ML
- Depth
- –
- Belgian time
- 12:08:462021-12-09
- UTC
- 11:08:462021-12-09
Main parameters
| Date and time | 2021-12-09 11:08:46 UTC 2021-12-09 12:08:46 Belgian time |
|---|---|
| Magnitude | ML 0.8 |
| Epicentral coordinates | 50.583° N, 5.696° E Uncertainty ± 1.1 km |
| Event ID | ROB 14975 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-12-10 09:52:59 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
- 9
- Epicentral distance
- 9.2 – 32.2km
- Mean velocity, P wave
- 5.7km/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 0.15 s.
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)7 stations | |||||
| LCHLa Chartreuse | 9.2 | 312 | 11:08:48.81+1.88 s | 11:08:50.14+3.21 s | 1.33 |
| STISart Tilman | 9.3 | 270 | 11:08:48.78+1.85 s | – | – |
| MEMHMembach | 22.4 | 83 | 11:08:50.80+3.87 s | – | – |
| MEMSMembach | 22.4 | 83 | 11:08:50.87+3.94 s | – | – |
| EBNEben-Emael | 23.8 | 357 | 11:08:51.46+4.53 s | – | – |
| MRGMont Rigi | 28.1 | 106 | 11:08:52.12+5.19 s | – | – |
| TNLTernell | 30.8 | 89 | 11:08:52.73+5.80 s | – | – |
| Dutch seismic network (KNMI)2 stations | |||||
| HGNHeimansgroeve | 26.1 | 40 | 11:08:51.53+4.60 s | 11:08:55.07+8.14 s | 3.54 |
| VKBValkenburg | 32.2 | 11 | 11:08:52.70+5.77 s | – | – |
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