CONSTHUM (LU)
Quarry blast20 May 2020
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 14:57:162020-05-20
- UTC
- 12:57:162020-05-20
Main parameters
| Date and time | 2020-05-20 12:57:16 UTC 2020-05-20 14:57:16 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 49.981° N, 6.045° E Uncertainty ± 0.7 km |
| Event ID | ROB 10075 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-05-21 15:18:29 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
- 12.3 – 104.7km
- 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: 8 measurements, root-mean-square deviation 0.40 s. S wave: 7 measurements, root-mean-square deviation 0.31 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 | |||||
| VIAVianden | 12.3 | 114 | 12:57:18.38+2.26 s | 12:57:20.31+4.19 s | 1.93 |
| KLBKalborn | 14.0 | 19 | 12:57:18.82+2.70 s | 12:57:21.36+5.24 s | 2.54 |
| HOUHouvegnez | 41.6 | 356 | 12:57:23.57+7.45 s | – | – |
| MRGMont Rigi | 59.0 | 2 | 12:57:26.52+10.40 s | 12:57:34.05+17.93 s | 7.53 |
| RCHRochefort | 61.7 | 289 | 12:57:26.20+10.08 s | 12:57:34.42+18.30 s | 8.22 |
| MEMHMembach | 69.9 | 358 | 12:57:28.70+12.58 s | 12:57:36.94+20.82 s | 8.24 |
| DOUDourbes | 104.7 | 278 | 12:57:35.00+18.88 s | 12:57:47.04+30.92 s | 12.04 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 87.5 | 355 | 12:57:31.59+15.47 s | 12:57:41.87+25.75 s | 10.28 |