MARCHE-LES-DAMES (BE)
Quarry blast28 April 2017
- Magnitude
- 1.4ML
- Depth
- 7.4km ± 4.0
- Belgian time
- 14:14:032017-04-28
- UTC
- 12:14:032017-04-28
Main parameters
| Date and time | 2017-04-28 12:14:03 UTC 2017-04-28 14:14:03 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.496° N, 4.960° E Uncertainty ± 1.9 km |
| Depth of hypocenter | 7.4 ± 4.0 km |
| Event ID | ROB 5681 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2017-04-28 14:39:29 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
- 15.3 – 92.9km
- Mean velocity, P wave
- 5.9km/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 7.4 km. P wave: 12 measurements, root-mean-square deviation 0.85 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 | 15.3 | 144 | 12:14:06.47+2.55 s | 12:14:08.80+4.88 s | 2.33 | 42.0 |
| MRDMaredsous | 25.6 | 212 | 12:14:08.74+4.82 s | – | – | – |
| CLAClavier | 25.7 | 109 | 12:14:08.53+4.61 s | 12:14:11.99+8.07 s | 3.46 | – |
| RCHRochefort | 42.4 | 153 | 12:14:11.49+7.57 s | – | – | – |
| STISart Tilman | 43.9 | 77 | 12:14:11.62+7.70 s | – | – | – |
| LCHLa Chartreuse | 47.9 | 70 | 12:14:09.32+5.40 s | – | – | – |
| DOUDourbes | 51.7 | 210 | 12:14:12.64+8.72 s | – | – | – |
| RQRRonquières | 53.5 | 283 | 12:14:12.87+8.95 s | – | – | – |
| SKQSteenkerque | 64.6 | 286 | 12:14:14.79+10.87 s | – | – | – |
| MEMHMembach | 75.4 | 80 | 12:14:17.51+13.59 s | – | – | – |
| HOUHouvegnez | 75.9 | 102 | 12:14:16.93+13.01 s | 12:14:26.00+22.08 s | 9.07 | 11.1 |
| KLBKalborn | 92.9 | 118 | 12:14:19.10+15.18 s | – | – | – |
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