TROOZ (BE)
Quarry blast16 March 2021
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 12:04:512021-03-16
- UTC
- 11:04:512021-03-16
Main parameters
| Date and time | 2021-03-16 11:04:51 UTC 2021-03-16 12:04:51 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.581° N, 5.705° E Uncertainty ± 0.9 km |
| Event ID | ROB 12780 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-03-18 14:05:39 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
- 7
- Epicentral distance
- 9.9 – 33.8km
- Mean velocity, P wave
- 5.8km/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: 7 measurements, root-mean-square deviation 0.19 s. S wave: 5 measurements, root-mean-square deviation 0.24 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)5 stations | |||||
| LCHLa Chartreuse | 9.9 | 311 | 11:04:52.98+1.94 s | 11:04:54.59+3.55 s | 1.61 |
| MEMSMembach | 21.8 | 82 | 11:04:55.01+3.97 s | 11:04:57.77+6.73 s | 2.76 |
| MEMHMembach | 21.8 | 82 | 11:04:55.02+3.98 s | – | – |
| MRGMont Rigi | 27.4 | 106 | 11:04:56.14+5.10 s | 11:04:59.84+8.80 s | 3.70 |
| CLAClavier | 33.8 | 238 | 11:04:57.55+6.51 s | 11:05:01.12+10.08 s | 3.57 |
| Dutch seismic network (KNMI)2 stations | |||||
| TERZTerziet | 24.2 | 36 | 11:04:55.33+4.29 s | – | – |
| HGNHeimansgroeve | 26.0 | 38 | 11:04:55.64+4.60 s | 11:04:59.20+8.16 s | 3.56 |