MOLENBAIX (BE)
Quarry blast26 July 2018
- Magnitude
- 1.9ML
- Depth
- 14.5km ± 2.4
- Belgian time
- 12:30:132018-07-26
- UTC
- 10:30:132018-07-26
Main parameters
| Date and time | 2018-07-26 10:30:13 UTC 2018-07-26 12:30:13 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.698° N, 3.428° E Uncertainty ± 3.7 km |
| Depth of hypocenter | 14.5 ± 2.4 km |
| Event ID | ROB 7030 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-07-27 10:46:19 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
- 8
- Epicentral distance
- 29.4 – 201.9km
- Mean velocity, P wave
- 5.7km/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 14.5 km. P wave: 6 measurements, root-mean-square deviation 0.19 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 | nm | |
|---|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)8 stations | ||||||
| LESLessines | 29.4 | 87 | 10:30:18.11+5.02 s | 10:30:23.28+10.19 s | 5.17 | – |
| SKQSteenkerque | 46.4 | 96 | 10:30:21.51+8.42 s | 10:30:26.84+13.75 s | 5.33 | – |
| BOUBougnies | 50.2 | 133 | 10:30:21.67+8.58 s | – | – | – |
| BRQBracquegnies | 55.7 | 115 | 10:30:22.68+9.59 s | – | – | – |
| RQRRonquières | 57.3 | 100 | 10:30:22.86+9.77 s | – | – | – |
| DOUDourbes | 106.7 | 128 | 10:30:31.45+18.36 s | 10:30:43.50+30.41 s | 12.05 | – |
| CLAClavier | 136.4 | 102 | 10:30:35.01+21.92 s | 10:30:51.69+38.60 s | 16.68 | 14.9 |
| KLBKalborn | 201.9 | 108 | 10:30:44.11+31.02 s | 10:31:06.29+53.20 s | 22.18 | – |