TROOZ (BE)
Quarry blast7 May 2020
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 13:33:232020-05-07
- UTC
- 11:33:232020-05-07
Main parameters
| Date and time | 2020-05-07 11:33:23 UTC 2020-05-07 13:33:23 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.571° N, 5.691° E Uncertainty ± 1.5 km |
| Event ID | ROB 9985 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-05-07 16:08:53 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
- 8
- Epicentral distance
- 9.9 – 60.3km
- Mean velocity, P wave
- 5.9km/s
- Mean velocity, S wave
- 3.2km/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 0.29 s. S wave: 6 measurements, root-mean-square deviation 0.34 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)6 stations | |||||
| LCHLa Chartreuse | 9.9 | 319 | 11:33:25.11+1.90 s | 11:33:27.28+4.07 s | 2.17 |
| MEMHMembach | 23.0 | 79 | 11:33:27.01+3.80 s | 11:33:30.64+7.43 s | 3.63 |
| EBNEben-Emael | 25.1 | 358 | 11:33:27.59+4.38 s | – | – |
| MRGMont Rigi | 28.0 | 104 | 11:33:28.12+4.91 s | 11:33:32.25+9.04 s | 4.13 |
| RCHRochefort | 56.9 | 216 | 11:33:32.84+9.63 s | – | – |
| KLBKalborn | 60.3 | 150 | 11:33:34.24+11.03 s | 11:33:42.02+18.81 s | 7.78 |
| Dutch seismic network (KNMI)2 stations | |||||
| HGNHeimansgroeve | 27.4 | 38 | 11:33:27.69+4.48 s | 11:33:31.67+8.46 s | 3.98 |
| VKBValkenburg | 33.5 | 11 | 11:33:29.00+5.79 s | 11:33:33.62+10.41 s | 4.62 |