MARCHE-LES-DAMES (BE)
Quarry blast24 July 2019
- Magnitude
- 1.0ML
- Depth
- 2.4km ± 8.3
- Belgian time
- 13:50:042019-07-24
- UTC
- 11:50:042019-07-24
Main parameters
| Date and time | 2019-07-24 11:50:04 UTC 2019-07-24 13:50:04 Belgian time |
|---|---|
| Magnitude | ML 1.0 |
| Epicentral coordinates | 50.502° N, 4.988° E Uncertainty ± 2.3 km |
| Depth of hypocenter | 2.4 ± 8.3 km |
| Event ID | ROB 8425 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-07-24 14:07:50 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
- 14.8 – 91.5km
- Mean velocity, P wave
- 5.5km/s
- Mean velocity, S wave
- 3.0km/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. Hypocenter at a depth of 2.4 km. P wave: 12 measurements, root-mean-square deviation 1.93 s. S wave: 4 measurements, root-mean-square deviation 0.41 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 | nm | |
|---|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)12 stations | ||||||
| GESGesves | 14.8 | 152 | 11:50:06.73+2.12 s | 11:50:08.75+4.14 s | 2.02 | – |
| CLAClavier | 24.1 | 112 | 11:50:08.61+4.00 s | 11:50:11.85+7.24 s | 3.24 | 12.1 |
| MRDMaredsous | 27.2 | 215 | 11:50:09.14+4.53 s | 11:50:13.24+8.63 s | 4.10 | – |
| STISart Tilman | 41.8 | 77 | 11:50:04.86+0.25 s | – | – | – |
| RCHRochefort | 42.2 | 156 | 11:50:11.83+7.22 s | – | – | – |
| LCHLa Chartreuse | 45.9 | 70 | 11:50:13.32+8.71 s | – | – | – |
| DOUDourbes | 53.3 | 212 | 11:50:13.90+9.29 s | 11:50:20.79+16.18 s | 6.89 | – |
| RQRRonquières | 55.3 | 282 | 11:50:13.94+9.33 s | – | – | – |
| SKQSteenkerque | 66.4 | 285 | 11:50:15.03+10.42 s | – | – | – |
| MEMHMembach | 73.4 | 80 | 11:50:17.67+13.06 s | – | – | – |
| HOUHouvegnez | 74.1 | 102 | 11:50:17.13+12.52 s | – | – | – |
| KLBKalborn | 91.5 | 119 | 11:50:20.41+15.80 s | – | – | – |
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