REBECQ (BE)
Quarry blast9 May 2019
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 14:40:402019-05-09
- UTC
- 12:40:402019-05-09
Main parameters
| Date and time | 2019-05-09 12:40:40 UTC 2019-05-09 14:40:40 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.681° N, 4.140° E Uncertainty ± 2.0 km |
| Event ID | ROB 8140 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-05-09 16:44:14 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
- 12
- Epicentral distance
- 5.6 – 154.2km
- Mean velocity, P wave
- 5.8km/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 0.36 s.
Stations farther than 120 km are left out of the fit: the first waves to reach them have travelled beneath the crust, through the mantle, where they propagate faster.
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)11 stations | |||||
| SKQSteenkerque | 5.6 | 230 | 12:40:41.97+1.05 s | 12:40:42.72+1.80 s | 0.75 |
| RQRRonquières | 10.3 | 144 | 12:40:42.42+1.50 s | – | – |
| UCCBUccle | 20.2 | 50 | 12:40:44.66+3.74 s | 12:40:47.18+6.26 s | 2.52 |
| BRQBracquegnies | 22.3 | 181 | 12:40:45.51+4.59 s | – | – |
| BOUBougnies | 35.4 | 203 | 12:40:47.40+6.48 s | – | – |
| MRDMaredsous | 61.4 | 133 | 12:40:51.07+10.15 s | – | – |
| DOUDourbes | 72.8 | 153 | 12:40:53.91+12.99 s | – | – |
| CLAClavier | 87.4 | 109 | 12:40:56.01+15.09 s | 12:41:06.36+25.44 s | 10.35 |
| MEMSMembach | 132.5 | 93 | 12:41:03.13+22.21 s | 12:41:19.95+39.03 s | 16.82 |
| MRGMont Rigi | 138.3 | 97 | 12:41:04.94+24.02 s | 12:41:22.25+41.33 s | 17.31 |
| KLBKalborn | 154.2 | 114 | 12:41:06.09+25.17 s | 12:41:24.98+44.06 s | 18.89 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 126.9 | 85 | 12:41:03.08+22.16 s | 12:41:18.81+37.89 s | 15.73 |