YVOIR (BE)
Quarry blast31 May 2018
- Magnitude
- 1.8ML
- Depth
- –
- Belgian time
- 14:04:342018-05-31
- UTC
- 12:04:342018-05-31
Main parameters
| Date and time | 2018-05-31 12:04:34 UTC 2018-05-31 14:04:34 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.346° N, 4.880° E Uncertainty ± 1.9 km |
| Event ID | ROB 6690 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-05-31 14:25:08 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
- 9.4 – 91.9km
- Mean velocity, P wave
- 5.7km/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: 7 measurements, root-mean-square deviation 0.16 s. S wave: 4 measurements, root-mean-square deviation 0.13 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 | |||||
| MRDMaredsous | 9.4 | 238 | 12:04:35.79+1.66 s | 12:04:37.27+3.14 s | 1.48 |
| GESGesves | 15.3 | 74 | 12:04:36.75+2.62 s | 12:04:38.77+4.64 s | 2.02 |
| CLAClavier | 31.1 | 75 | 12:04:39.55+5.42 s | 12:04:43.91+9.78 s | 4.36 |
| DOUDourbes | 34.6 | 216 | 12:04:40.65+6.52 s | 12:04:44.90+10.77 s | 4.25 |
| HOUHouvegnez | 80.1 | 89 | 12:04:48.21+14.08 s | – | – |
| MEMSMembach | 85.3 | 70 | 12:04:49.14+15.01 s | – | – |
| KLBKalborn | 91.9 | 107 | 12:04:50.33+16.20 s | – | – |