DURBUY (BE)
Quarry blast18 September 2019
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 14:23:542019-09-18
- UTC
- 12:23:542019-09-18
Main parameters
| Date and time | 2019-09-18 12:23:54 UTC 2019-09-18 14:23:54 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.359° N, 5.556° E Uncertainty ± 0.9 km |
| Event ID | ROB 8675 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-09-18 15:09:45 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
- 19.2 – 52.3km
- Mean velocity, P wave
- 5.8km/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 0.19 s. S wave: 4 measurements, root-mean-square deviation 0.35 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 | |||||
| CLAClavier | 19.2 | 290 | 12:23:57.72+2.98 s | 12:24:01.15+6.41 s | 3.43 |
| HOUHouvegnez | 32.0 | 91 | 12:24:00.11+5.37 s | – | – |
| GESGesves | 33.4 | 275 | 12:24:00.57+5.83 s | 12:24:05.48+10.74 s | 4.91 |
| MEMSMembach | 42.6 | 49 | 12:24:02.12+7.38 s | – | – |
| MEMHMembach | 42.6 | 49 | 12:24:02.25+7.51 s | 12:24:08.28+13.54 s | 6.03 |
| KLBKalborn | 48.9 | 126 | 12:24:03.44+8.70 s | 12:24:09.55+14.81 s | 6.11 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 52.3 | 30 | 12:24:03.93+9.19 s | – | – |