DURBUY (BE)
Quarry blast20 June 2019
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 14:35:302019-06-20
- UTC
- 12:35:302019-06-20
Main parameters
| Date and time | 2019-06-20 12:35:30 UTC 2019-06-20 14:35:30 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.354° N, 5.581° E Uncertainty ± 1.3 km |
| Event ID | ROB 8270 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-06-20 14:48:05 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
- 13
- Epicentral distance
- 21.1 – 116.5km
- Mean velocity, P wave
- 5.6km/s
- Mean velocity, S wave
- 3.3km/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: 13 measurements, root-mean-square deviation 0.62 s. S wave: 7 measurements, root-mean-square deviation 0.52 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)12 stations | |||||
| CLAClavier | 21.1 | 290 | 12:35:33.58+3.28 s | 12:35:36.91+6.61 s | 3.33 |
| HOUHouvegnez | 30.2 | 90 | 12:35:35.71+5.41 s | 12:35:39.95+9.65 s | 4.24 |
| LCHLa Chartreuse | 31.7 | 2 | 12:35:36.04+5.74 s | – | – |
| GESGesves | 35.3 | 276 | 12:35:36.16+5.86 s | 12:35:41.03+10.73 s | 4.87 |
| MRGMont Rigi | 39.2 | 63 | 12:35:37.24+6.94 s | 12:35:41.45+11.15 s | 4.21 |
| MEMHMembach | 41.6 | 47 | 12:35:37.72+7.42 s | – | – |
| MEMSMembach | 41.6 | 47 | 12:35:37.77+7.47 s | – | – |
| KLBKalborn | 47.1 | 127 | 12:35:38.65+8.35 s | 12:35:44.67+14.37 s | 6.02 |
| DOUDourbes | 76.0 | 248 | 12:35:44.22+13.92 s | 12:35:52.30+22.00 s | 8.08 |
| OPTOpitter | 84.4 | 3 | 12:35:47.24+16.94 s | – | – |
| SKQSteenkerque | 111.4 | 288 | 12:35:49.41+19.11 s | 12:36:04.31+34.01 s | 14.90 |
| BOUBougnies | 116.5 | 273 | 12:35:50.60+20.30 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 51.9 | 28 | 12:35:39.53+9.23 s | – | – |